Experimentally implement t.like() assertion

Co-authored-by: Mark Wubben <mark@novemberborn.net>

Author: futpib

docs/03-assertions.md

@@ -207,6 +207,55 @@ Assert that `value` is deeply equal to `expected`. See [Concordance](https://git
 
 Assert that `value` is not deeply equal to `expected`. The inverse of `.deepEqual()`.
 
+### `.like(value, selector, message?)`
+
+Assert that `value` is like `selector`. This is a variant of `.deepEqual()`, however `selector` does not need to have the same enumerable properties as `value` does.
+
+Instead AVA derives a *comparable* object from `value`, based on the deeply-nested properties of `selector`. This object is then compared to `selector` using `.deepEqual()`.
+
+Any values in `selector` that are not regular objects should be deeply equal to the corresponding values in `value`.
+
+This is an experimental assertion for the time being. You need to enable it:
+
+**`package.json`**:
+
+```json
+{
+	"ava": {
+		"nonSemVerExperiments": {
+			"likeAssertion": true
+		}
+	}
+}
+```
+
+**`ava.config.js`**:
+
+```js
+export default {
+	nonSemVerExperiments: {
+		likeAssertion: true
+	}
+}
+```
+
+In the following example, the `map` property of `value` must be deeply equal to that of `selector`. However `nested.qux` is ignored, because it's not in `selector`.
+
+```js
+t.like({
+	map: new Map([['foo', 'bar']]),
+	nested: {
+		baz: 'thud',
+		qux: 'quux'
+	}
+}, {
+	map: new Map([['foo', 'bar']]),
+	nested: {
+		baz: 'thud',
+	}
+})
+```
+
 ### `.throws(fn, expectation?, message?)`
 
 Assert that an error is thrown. `fn` must be a function which should throw. The thrown value *must* be an error. It is returned so you can run more assertions against it.

index.d.ts

@@ -45,6 +45,9 @@ export interface Assertions {
 	/** Assert that `actual` is [deeply equal](https://github.com/concordancejs/concordance#comparison-details) to `expected`. */
 	deepEqual: DeepEqualAssertion;
 
+	/** Assert that `actual` is like `expected`. */
+	like: LikeAssertion;
+
 	/** Fail the test. */
 	fail: FailAssertion;
 
@@ -125,6 +128,14 @@ export interface DeepEqualAssertion {
 	skip(actual: any, expected: any, message?: string): void;
 }
 
+export interface LikeAssertion {
+	/** Assert that `value` is like `selector`. */
+	(value: any, selector: object, message?: string): void;
+
+	/** Skip this assertion. */
+	skip(value: any, selector: any, message?: string): void;
+}
+
 export interface FailAssertion {
 	/** Fail the test. */
 	(message?: string): void;

lib/assert.js

@@ -3,6 +3,7 @@ const concordance = require('concordance');
 const isError = require('is-error');
 const isPromise = require('is-promise');
 const concordanceOptions = require('./concordance-options').default;
+const {CIRCULAR_SELECTOR, isLikeSelector, selectComparable} = require('./like-selector');
 const snapshotManager = require('./snapshot-manager');
 
 function formatDescriptorDiff(actualDescriptor, expectedDescriptor, options) {
@@ -241,7 +242,8 @@ class Assertions {
 		fail = notImplemented,
 		skip = notImplemented,
 		compareWithSnapshot = notImplemented,
-		powerAssert
+		powerAssert,
+		experiments = {}
 	} = {}) {
 		const withSkip = assertionFn => {
 			assertionFn.skip = skip;
@@ -386,6 +388,61 @@ class Assertions {
 			}
 		});
 
+		this.like = withSkip((actual, selector, message) => {
+			if (!experiments.likeAssertion) {
+				fail(new AssertionError({
+					assertion: 'like',
+					improperUsage: true,
+					message: 'You must enable the `likeAssertion` experiment in order to use `t.like()`'
+				}));
+				return;
+			}
+
+			if (!checkMessage('like', message)) {
+				return;
+			}
+
+			if (!isLikeSelector(selector)) {
+				fail(new AssertionError({
+					assertion: 'like',
+					improperUsage: true,
+					message: '`t.like()` selector must be a non-empty object',
+					values: [formatWithLabel('Called with:', selector)]
+				}));
+				return;
+			}
+
+			let comparable;
+			try {
+				comparable = selectComparable(actual, selector);
+			} catch (error) {
+				if (error === CIRCULAR_SELECTOR) {
+					fail(new AssertionError({
+						assertion: 'like',
+						improperUsage: true,
+						message: '`t.like()` selector must not contain circular references',
+						values: [formatWithLabel('Called with:', selector)]
+					}));
+					return;
+				}
+
+				throw error;
+			}
+
+			const result = concordance.compare(comparable, selector, concordanceOptions);
+			if (result.pass) {
+				pass();
+			} else {
+				const actualDescriptor = result.actual || concordance.describe(comparable, concordanceOptions);
+				const expectedDescriptor = result.expected || concordance.describe(selector, concordanceOptions);
+				fail(new AssertionError({
+					assertion: 'like',
+					message,
+					values: [formatDescriptorDiff(actualDescriptor, expectedDescriptor)]
+				}));
+			}
+		});
+
 		this.throws = withSkip((...args) => {
 			// Since arrow functions do not support 'arguments', we are using rest
 			// operator, so we can determine the total number of arguments passed

lib/like-selector.js

@@ -0,0 +1,37 @@
+'use strict';
+function isLikeSelector(selector) {
+	return selector !== null &&
+		typeof selector === 'object' &&
+		Reflect.getPrototypeOf(selector) === Object.prototype &&
+		Reflect.ownKeys(selector).length > 0;
+}
+
+exports.isLikeSelector = isLikeSelector;
+
+const CIRCULAR_SELECTOR = new Error('Encountered a circular selector');
+exports.CIRCULAR_SELECTOR = CIRCULAR_SELECTOR;
+
+function selectComparable(lhs, selector, circular = new Set()) {
+	if (circular.has(selector)) {
+		throw CIRCULAR_SELECTOR;
+	}
+
+	circular.add(selector);
+
+	if (lhs === null || typeof lhs !== 'object') {
+		return lhs;
+	}
+
+	const comparable = {};
+	for (const [key, rhs] of Object.entries(selector)) {
+		if (isLikeSelector(rhs)) {
+			comparable[key] = selectComparable(Reflect.get(lhs, key), rhs, circular);
+		} else {
+			comparable[key] = Reflect.get(lhs, key);
+		}
+	}
+
+	return comparable;
+}
+
+exports.selectComparable = selectComparable;

lib/load-config.js

@@ -7,7 +7,7 @@ const pkgConf = require('pkg-conf');
 
 const NO_SUCH_FILE = Symbol('no ava.config.js file');
 const MISSING_DEFAULT_EXPORT = Symbol('missing default export');
-const EXPERIMENTS = new Set(['reverseTeardowns']);
+const EXPERIMENTS = new Set(['likeAssertion', 'reverseTeardowns']);
 
 // *Very* rudimentary support for loading ava.config.js files containing an `export default` statement.
 const evaluateJsConfig = configFile => {

lib/test.js

@@ -39,7 +39,8 @@ class ExecutionContext extends assert.Assertions {
 			compareWithSnapshot: options => {
 				return test.compareWithSnapshot(options);
 			},
-			powerAssert: test.powerAssert
+			powerAssert: test.powerAssert,
+			experiments: test.experiments
 		});
 		testMap.set(this, test);
 

test-d/like.ts

@@ -0,0 +1,17 @@
+import test from '..';
+
+test('like', t => {
+	t.like({
+		map: new Map([['foo', 'bar']]),
+		nested: {
+			baz: 'thud',
+			qux: 'quux'
+		}
+	}, {
+		map: new Map([['foo', 'bar']]),
+		nested: {
+			baz: 'thud'
+		}
+	});
+});
+

test-tap/assert.js

@@ -31,6 +31,9 @@ const assertions = new class extends assert.Assertions {
 				lastFailure = error;
 			},
 			skip: () => {},
+			experiments: {
+				likeAssertion: true
+			},
 			...overwrites
 		});
 	}
@@ -783,6 +786,210 @@ test('.notDeepEqual()', t => {
 	t.end();
 });
 
+test('.like()', t => {
+	fails(t, () => {
+		assertions.like({a: false}, {a: 0});
+	});
+
+	passes(t, () => {
+		assertions.like({
+			a: 'a',
+			b: 'b'
+		}, {
+			b: 'b',
+			a: 'a'
+		});
+	});
+
+	passes(t, () => {
+		const {like} = assertions;
+		like({a: 'a', b: 'b'}, {b: 'b', a: 'a'});
+	});
+
+	passes(t, () => {
+		assertions.like({
+			a: 'a',
+			b: 'b',
+			c: {
+				d: 'd',
+				x: 'x'
+			},
+			x: 'x'
+		}, {
+			c: {
+				d: 'd'
+			},
+			b: 'b',
+			a: 'a'
+		});
+	});
+
+	fails(t, () => {
+		assertions.like([1, 2, 3], [1, 2, 3, 4]);
+	});
+
+	fails(t, () => {
+		assertions.like({
+			a: [1, 2, 3]
+		}, {
+			a: [1, 2, 3, 4]
+		});
+	});
+
+	passes(t, () => {
+		assertions.like({
+			a: [1, 2, 3],
+			x: 'x'
+		}, {
+			a: [1, 2, 3]
+		});
+	});
+
+	passes(t, () => {
+		const actual = {
+			a: 'a',
+			extra: 'irrelevant'
+		};
+		actual.circular = actual;
+
+		const likePattern = {
+			a: 'a'
+		};
+
+		assertions.like(actual, likePattern);
+	});
+
+	fails(t, () => {
+		const fnA = a => a;
+		const fnB = a => a;
+		assertions.like(fnA, fnB);
+	});
+
+	fails(t, () => {
+		const fnA = a => a;
+		const fnB = a => a;
+		assertions.like({
+			fn: fnA
+		}, {
+			fn: fnB
+		});
+	});
+
+	fails(t, () => {
+		function Foo(a) {
+			this.a = a;
+		}
+
+		function Bar(a) {
+			this.a = a;
+		}
+
+		const x = new Foo(1);
+		const y = new Bar(1);
+
+		assertions.like(x, y);
+	});
+
+	passes(t, () => {
+		assertions.like({a: 'a'}, {a: 'a'});
+	});
+
+	passes(t, () => {
+		assertions.like({a: 'a', b: 'b'}, {a: 'a'});
+	});
+
+	passes(t, () => {
+		assertions.like({ab: ['a', 'b']}, {ab: ['a', 'b']});
+	});
+
+	passes(t, () => {
+		assertions.like({ab: ['a', 'b'], c: 'c'}, {ab: ['a', 'b']});
+	});
+
+	fails(t, () => {
+		assertions.like({a: 'a'}, {a: 'b'});
+	});
+
+	fails(t, () => {
+		assertions.like({a: 'a', b: 'b'}, {a: 'b'});
+	});
+
+	fails(t, () => {
+		assertions.like({ab: ['a', 'b']}, {ab: ['a', 'a']});
+	});
+
+	fails(t, () => {
+		assertions.like({ab: ['a', 'b'], c: 'c'}, {ab: ['a', 'a']});
+	});
+
+	fails(t, () => {
+		assertions.like([['a', 'b'], 'c'], [['a', 'b'], 'd']);
+	});
+
+	fails(t, () => {
+		const circular = ['a', 'b'];
+		circular.push(circular);
+		assertions.like([circular, 'c'], [circular, 'd']);
+	});
+
+	fails(t, () => {
+		const circular = ['a', 'b'];
+		circular.push(circular);
+		assertions.like({xc: [circular, 'c']}, {xc: [circular, 'd']});
+	});
+
+	failsWith(t, () => {
+		assertions.like({a: 'a'}, {});
+	}, {
+		assertion: 'like',
+		message: '`t.like()` selector must be a non-empty object',
+		values: [{label: 'Called with:', formatted: '{}'}]
+	});
+
+	failsWith(t, () => {
+		assertions.like('foo', 'bar');
+	}, {
+		assertion: 'like',
+		message: '`t.like()` selector must be a non-empty object',
+		values: [{label: 'Called with:', formatted: '\'bar\''}]
+	});
+
+	failsWith(t, () => {
+		const likePattern = {
+			a: 'a'
+		};
+		likePattern.circular = likePattern;
+
+		assertions.like({}, likePattern);
+	}, {
+		assertion: 'like',
+		message: '`t.like()` selector must not contain circular references',
+		values: [{label: 'Called with:', formatted: '{\n  a: \'a\',\n  circular: [Circular],\n}'}]
+	});
+
+	failsWith(t, () => {
+		assertions.like({}, {}, null);
+	}, {
+		assertion: 'like',
+		improperUsage: true,
+		message: 'The assertion message must be a string',
+		values: [{
+			label: 'Called with:',
+			formatted: /null/
+		}]
+	});
+
+	failsWith(t, () => {
+		assertions.like({a: 'foo', b: 'irrelevant'}, {a: 'bar'});
+	}, {
+		assertion: 'like',
+		message: '',
+		values: [{label: 'Difference:', formatted: /{\n-\s*a: 'foo',\n\+\s*a: 'bar',\n\s*}/}]
+	});
+
+	t.end();
+});
+
 test('.throws()', gather(t => {
 	// Fails because function doesn't throw.
 	failsWith(t, () => {

test-tap/fixture/report/regular/nested-objects.js

@@ -27,3 +27,29 @@ test('format with max depth 4', t => {
 	};
 	t.deepEqual(exp, act);
 });
+
+test('format like with max depth 4', t => {
+	const pattern = {
+		a: {
+			b: {
+				foo: 'qux'
+			}
+		}
+	};
+	const actual = {
+		a: {
+			b: {
+				foo: 'bar',
+				extra: 'irrelevant'
+			}
+		},
+		c: {
+			d: {
+				e: {
+					foo: 'bar'
+				}
+			}
+		}
+	};
+	t.like(actual, pattern);
+});

test-tap/helper/report.js

@@ -52,7 +52,7 @@ exports.assert = (t, logFile, buffer) => {
 		// Log the entire actual and expected values, so they can be diffed
 		// manually. TAP's diff output is really confusing in this situation.
 		console.dir({actual, expected});
-		t.fail('Output did not match expectation');
+		t.fail(`Output did not match expectation: ${logFile}`);
 	}
 };
 
@@ -88,7 +88,7 @@ const run = (type, reporter, {match = [], filter} = {}) => {
 		serial: type === 'failFast' || type === 'failFast2',
 		require: [],
 		cacheEnabled: true,
-		experiments: {},
+		experiments: {likeAssertion: true},
 		match,
 		providers,
 		projectDir,

test-tap/reporters/mini.regular.v10.log

@@ -7,155 +7,159 @@
 
   1 test failed---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
+* nested-objects › format like with max depth 4
+
+  2 tests failed---tty-stream-chunk-separator
+---tty-stream-chunk-separator
 * output-in-hook › passing test
 
   1 passed
-  1 test failed---tty-stream-chunk-separator
+  2 tests failed---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * output-in-hook › failing test
 
   1 passed
-  2 tests failed---tty-stream-chunk-separator
+  3 tests failed---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * test › passes
 
   2 passed
-  2 tests failed
+  3 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * test › fails
 
   2 passed
-  3 tests failed
+  4 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * test › known failure
 
   2 passed
   1 known failure
-  3 tests failed
+  4 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * test › no longer failing
 
   2 passed
   1 known failure
-  4 tests failed
+  5 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * test › logs
 
   2 passed
   1 known failure
-  5 tests failed
+  6 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * test › formatted
 
   2 passed
   1 known failure
-  6 tests failed
+  7 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * test › power-assert
 
   2 passed
   1 known failure
-  7 tests failed
+  8 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * test › bad throws
 
   2 passed
   1 known failure
-  8 tests failed
+  9 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * test › bad notThrows
 
   2 passed
   1 known failure
-  9 tests failed
+  10 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * test › implementation throws non-error
 
   2 passed
   1 known failure
-  10 tests failed
+  11 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * traces-in-t-throws › throws
 
   2 passed
   1 known failure
-  11 tests failed
+  12 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * traces-in-t-throws › notThrows
 
   2 passed
   1 known failure
-  12 tests failed
+  13 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * traces-in-t-throws › notThrowsAsync
 
   2 passed
   1 known failure
-  13 tests failed
+  14 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * traces-in-t-throws › throwsAsync
 
   2 passed
   1 known failure
-  14 tests failed
+  15 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * traces-in-t-throws › throwsAsync different error
 
   2 passed
   1 known failure
-  15 tests failed
+  16 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * uncaught-exception › passes
 
   3 passed
   1 known failure
-  15 tests failed
+  16 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * unhandled-rejection › passes
 
   4 passed
   1 known failure
-  15 tests failed
+  16 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * unhandled-rejection › unhandled non-error rejection
 
   5 passed
   1 known failure
-  15 tests failed
+  16 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
@@ -193,6 +197,30 @@
 
 
 
+  nested-objects › format like with max depth 4
+
+  nested-objects.js:54
+
+   53:   };                      
+   54:   t.like(actual, pattern);
+   55: });                       
+
+  Difference:
+
+    {
+      a: {
+        b: {
+  -       foo: 'bar',
+  +       foo: 'qux',
+        },
+      },
+    }
+
+  › t (test-tap/fixture/report/regular/nested-objects.js:54:4)
+  › process._tickCallback (internal/process/next_tick.js:68:7)
+
+
+
   output-in-hook › failing test
 
   output-in-hook.js:34
@@ -518,7 +546,7 @@
 
   ─
 
-  15 tests failed
+  16 tests failed
   1 known failure
   1 test skipped
   1 test todo

test-tap/reporters/mini.regular.v12.log

@@ -7,155 +7,159 @@
 
   1 test failed---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
+* nested-objects › format like with max depth 4
+
+  2 tests failed---tty-stream-chunk-separator
+---tty-stream-chunk-separator
 * output-in-hook › passing test
 
   1 passed
-  1 test failed---tty-stream-chunk-separator
+  2 tests failed---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * output-in-hook › failing test
 
   1 passed
-  2 tests failed---tty-stream-chunk-separator
+  3 tests failed---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * test › passes
 
   2 passed
-  2 tests failed
+  3 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * test › fails
 
   2 passed
-  3 tests failed
+  4 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * test › known failure
 
   2 passed
   1 known failure
-  3 tests failed
+  4 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * test › no longer failing
 
   2 passed
   1 known failure
-  4 tests failed
+  5 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * test › logs
 
   2 passed
   1 known failure
-  5 tests failed
+  6 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * test › formatted
 
   2 passed
   1 known failure
-  6 tests failed
+  7 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * test › power-assert
 
   2 passed
   1 known failure
-  7 tests failed
+  8 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * test › bad throws
 
   2 passed
   1 known failure
-  8 tests failed
+  9 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * test › bad notThrows
 
   2 passed
   1 known failure
-  9 tests failed
+  10 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * test › implementation throws non-error
 
   2 passed
   1 known failure
-  10 tests failed
+  11 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * traces-in-t-throws › throws
 
   2 passed
   1 known failure
-  11 tests failed
+  12 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * traces-in-t-throws › notThrows
 
   2 passed
   1 known failure
-  12 tests failed
+  13 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * traces-in-t-throws › notThrowsAsync
 
   2 passed
   1 known failure
-  13 tests failed
+  14 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * traces-in-t-throws › throwsAsync
 
   2 passed
   1 known failure
-  14 tests failed
+  15 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * traces-in-t-throws › throwsAsync different error
 
   2 passed
   1 known failure
-  15 tests failed
+  16 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * uncaught-exception › passes
 
   3 passed
   1 known failure
-  15 tests failed
+  16 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * unhandled-rejection › passes
 
   4 passed
   1 known failure
-  15 tests failed
+  16 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * unhandled-rejection › unhandled non-error rejection
 
   5 passed
   1 known failure
-  15 tests failed
+  16 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
@@ -192,6 +196,29 @@
 
 
 
+  nested-objects › format like with max depth 4
+
+  nested-objects.js:54
+
+   53:   };                      
+   54:   t.like(actual, pattern);
+   55: });                       
+
+  Difference:
+
+    {
+      a: {
+        b: {
+  -       foo: 'bar',
+  +       foo: 'qux',
+        },
+      },
+    }
+
+  › test-tap/fixture/report/regular/nested-objects.js:54:4
+
+
+
   output-in-hook › failing test
 
   output-in-hook.js:34
@@ -502,7 +529,7 @@
 
   ─
 
-  15 tests failed
+  16 tests failed
   1 known failure
   1 test skipped
   1 test todo

test-tap/reporters/mini.regular.v13.log

@@ -7,155 +7,159 @@
 
   1 test failed---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
+* nested-objects › format like with max depth 4
+
+  2 tests failed---tty-stream-chunk-separator
+---tty-stream-chunk-separator
 * output-in-hook › passing test
 
   1 passed
-  1 test failed---tty-stream-chunk-separator
+  2 tests failed---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * output-in-hook › failing test
 
   1 passed
-  2 tests failed---tty-stream-chunk-separator
+  3 tests failed---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * test › passes
 
   2 passed
-  2 tests failed
+  3 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * test › fails
 
   2 passed
-  3 tests failed
+  4 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * test › known failure
 
   2 passed
   1 known failure
-  3 tests failed
+  4 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * test › no longer failing
 
   2 passed
   1 known failure
-  4 tests failed
+  5 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * test › logs
 
   2 passed
   1 known failure
-  5 tests failed
+  6 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * test › formatted
 
   2 passed
   1 known failure
-  6 tests failed
+  7 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * test › power-assert
 
   2 passed
   1 known failure
-  7 tests failed
+  8 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * test › bad throws
 
   2 passed
   1 known failure
-  8 tests failed
+  9 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * test › bad notThrows
 
   2 passed
   1 known failure
-  9 tests failed
+  10 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * test › implementation throws non-error
 
   2 passed
   1 known failure
-  10 tests failed
+  11 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * traces-in-t-throws › throws
 
   2 passed
   1 known failure
-  11 tests failed
+  12 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * traces-in-t-throws › notThrows
 
   2 passed
   1 known failure
-  12 tests failed
+  13 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * traces-in-t-throws › notThrowsAsync
 
   2 passed
   1 known failure
-  13 tests failed
+  14 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * traces-in-t-throws › throwsAsync
 
   2 passed
   1 known failure
-  14 tests failed
+  15 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * traces-in-t-throws › throwsAsync different error
 
   2 passed
   1 known failure
-  15 tests failed
+  16 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * uncaught-exception › passes
 
   3 passed
   1 known failure
-  15 tests failed
+  16 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * unhandled-rejection › passes
 
   4 passed
   1 known failure
-  15 tests failed
+  16 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * unhandled-rejection › unhandled non-error rejection
 
   5 passed
   1 known failure
-  15 tests failed
+  16 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
@@ -192,6 +196,29 @@
 
 
 
+  nested-objects › format like with max depth 4
+
+  nested-objects.js:54
+
+   53:   };                      
+   54:   t.like(actual, pattern);
+   55: });                       
+
+  Difference:
+
+    {
+      a: {
+        b: {
+  -       foo: 'bar',
+  +       foo: 'qux',
+        },
+      },
+    }
+
+  › test-tap/fixture/report/regular/nested-objects.js:54:4
+
+
+
   output-in-hook › failing test
 
   output-in-hook.js:34
@@ -502,7 +529,7 @@
 
   ─
 
-  15 tests failed
+  16 tests failed
   1 known failure
   1 test skipped
   1 test todo

test-tap/reporters/mini.regular.v14.log

@@ -7,155 +7,159 @@
 
   1 test failed---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
+* nested-objects › format like with max depth 4
+
+  2 tests failed---tty-stream-chunk-separator
+---tty-stream-chunk-separator
 * output-in-hook › passing test
 
   1 passed
-  1 test failed---tty-stream-chunk-separator
+  2 tests failed---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * output-in-hook › failing test
 
   1 passed
-  2 tests failed---tty-stream-chunk-separator
+  3 tests failed---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * test › passes
 
   2 passed
-  2 tests failed
+  3 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * test › fails
 
   2 passed
-  3 tests failed
+  4 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * test › known failure
 
   2 passed
   1 known failure
-  3 tests failed
+  4 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * test › no longer failing
 
   2 passed
   1 known failure
-  4 tests failed
+  5 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * test › logs
 
   2 passed
   1 known failure
-  5 tests failed
+  6 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * test › formatted
 
   2 passed
   1 known failure
-  6 tests failed
+  7 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * test › power-assert
 
   2 passed
   1 known failure
-  7 tests failed
+  8 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * test › bad throws
 
   2 passed
   1 known failure
-  8 tests failed
+  9 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * test › bad notThrows
 
   2 passed
   1 known failure
-  9 tests failed
+  10 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * test › implementation throws non-error
 
   2 passed
   1 known failure
-  10 tests failed
+  11 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * traces-in-t-throws › throws
 
   2 passed
   1 known failure
-  11 tests failed
+  12 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * traces-in-t-throws › notThrows
 
   2 passed
   1 known failure
-  12 tests failed
+  13 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * traces-in-t-throws › notThrowsAsync
 
   2 passed
   1 known failure
-  13 tests failed
+  14 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * traces-in-t-throws › throwsAsync
 
   2 passed
   1 known failure
-  14 tests failed
+  15 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * traces-in-t-throws › throwsAsync different error
 
   2 passed
   1 known failure
-  15 tests failed
+  16 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * uncaught-exception › passes
 
   3 passed
   1 known failure
-  15 tests failed
+  16 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * unhandled-rejection › passes
 
   4 passed
   1 known failure
-  15 tests failed
+  16 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
 * unhandled-rejection › unhandled non-error rejection
 
   5 passed
   1 known failure
-  15 tests failed
+  16 tests failed
   1 skipped
   1 todo---tty-stream-chunk-separator
 ---tty-stream-chunk-separator
@@ -192,6 +196,29 @@
 
 
 
+  nested-objects › format like with max depth 4
+
+  nested-objects.js:54
+
+   53:   };                      
+   54:   t.like(actual, pattern);
+   55: });                       
+
+  Difference:
+
+    {
+      a: {
+        b: {
+  -       foo: 'bar',
+  +       foo: 'qux',
+        },
+      },
+    }
+
+  › test-tap/fixture/report/regular/nested-objects.js:54:4
+
+
+
   output-in-hook › failing test
 
   output-in-hook.js:34
@@ -502,7 +529,7 @@
 
   ─
 
-  15 tests failed
+  16 tests failed
   1 known failure
   1 test skipped
   1 test todo

test-tap/reporters/tap.regular.v10.log

@@ -37,6 +37,26 @@ not ok 3 - nested-objects › format with max depth 4
       process._tickCallback (internal/process/next_tick.js:68:7)
   ...
 ---tty-stream-chunk-separator
+# nested-objects › format like with max depth 4
+not ok 4 - nested-objects › format like with max depth 4
+  ---
+    name: AssertionError
+    assertion: like
+    values:
+      'Difference:': |2-
+          {
+            a: {
+              b: {
+        -       foo: 'bar',
+        +       foo: 'qux',
+              },
+            },
+          }
+    at: |-
+      t (test-tap/fixture/report/regular/nested-objects.js:54:4)
+      process._tickCallback (internal/process/next_tick.js:68:7)
+  ...
+---tty-stream-chunk-separator
 # output-in-hook › before hook
 ---tty-stream-chunk-separator
 # output-in-hook › before hook
@@ -52,10 +72,10 @@ not ok 3 - nested-objects › format with max depth 4
   # beforeEach
 ---tty-stream-chunk-separator
 # output-in-hook › passing test
-ok 4 - output-in-hook › passing test
+ok 5 - output-in-hook › passing test
 ---tty-stream-chunk-separator
 # output-in-hook › failing test
-not ok 5 - output-in-hook › failing test
+not ok 6 - output-in-hook › failing test
   ---
     name: AssertionError
     message: Test failed via `t.fail()`
@@ -82,16 +102,16 @@ not ok 5 - output-in-hook › failing test
   # afterAlways
 ---tty-stream-chunk-separator
 # test › skip
-ok 6 - test › skip # SKIP
+ok 7 - test › skip # SKIP
 ---tty-stream-chunk-separator
 # test › todo
-not ok 7 - test › todo # TODO
+not ok 8 - test › todo # TODO
 ---tty-stream-chunk-separator
 # test › passes
-ok 8 - test › passes
+ok 9 - test › passes
 ---tty-stream-chunk-separator
 # test › fails
-not ok 9 - test › fails
+not ok 10 - test › fails
   ---
     name: AssertionError
     message: Test failed via `t.fail()`
@@ -102,10 +122,10 @@ not ok 9 - test › fails
   ...
 ---tty-stream-chunk-separator
 # test › known failure
-ok 10 - test › known failure
+ok 11 - test › known failure
 ---tty-stream-chunk-separator
 # test › no longer failing
-not ok 11 - test › no longer failing
+not ok 12 - test › no longer failing
   ---
     name: Error
     message: >-
@@ -115,7 +135,7 @@ not ok 11 - test › no longer failing
   ...
 ---tty-stream-chunk-separator
 # test › logs
-not ok 12 - test › logs
+not ok 13 - test › logs
   * hello
   * world
   ---
@@ -128,7 +148,7 @@ not ok 12 - test › logs
   ...
 ---tty-stream-chunk-separator
 # test › formatted
-not ok 13 - test › formatted
+not ok 14 - test › formatted
   ---
     name: AssertionError
     assertion: deepEqual
@@ -142,7 +162,7 @@ not ok 13 - test › formatted
   ...
 ---tty-stream-chunk-separator
 # test › power-assert
-not ok 14 - test › power-assert
+not ok 15 - test › power-assert
   ---
     name: AssertionError
     assertion: assert
@@ -155,7 +175,7 @@ not ok 14 - test › power-assert
   ...
 ---tty-stream-chunk-separator
 # test › bad throws
-not ok 15 - test › bad throws
+not ok 16 - test › bad throws
   ---
     name: AssertionError
     message: Improper usage of `t.throws()` detected
@@ -172,7 +192,7 @@ not ok 15 - test › bad throws
   ...
 ---tty-stream-chunk-separator
 # test › bad notThrows
-not ok 16 - test › bad notThrows
+not ok 17 - test › bad notThrows
   ---
     name: AssertionError
     message: Improper usage of `t.notThrows()` detected
@@ -189,7 +209,7 @@ not ok 16 - test › bad notThrows
   ...
 ---tty-stream-chunk-separator
 # test › implementation throws non-error
-not ok 17 - test › implementation throws non-error
+not ok 18 - test › implementation throws non-error
   ---
     name: AssertionError
     message: Error thrown in test
@@ -199,7 +219,7 @@ not ok 17 - test › implementation throws non-error
   ...
 ---tty-stream-chunk-separator
 # traces-in-t-throws › throws
-not ok 18 - traces-in-t-throws › throws
+not ok 19 - traces-in-t-throws › throws
   ---
     name: AssertionError
     assertion: throws
@@ -221,7 +241,7 @@ not ok 18 - traces-in-t-throws › throws
   ...
 ---tty-stream-chunk-separator
 # traces-in-t-throws › notThrows
-not ok 19 - traces-in-t-throws › notThrows
+not ok 20 - traces-in-t-throws › notThrows
   ---
     name: AssertionError
     assertion: notThrows
@@ -242,7 +262,7 @@ not ok 19 - traces-in-t-throws › notThrows
   ...
 ---tty-stream-chunk-separator
 # traces-in-t-throws › notThrowsAsync
-not ok 20 - traces-in-t-throws › notThrowsAsync
+not ok 21 - traces-in-t-throws › notThrowsAsync
   ---
     name: AssertionError
     assertion: notThrowsAsync
@@ -259,7 +279,7 @@ not ok 20 - traces-in-t-throws › notThrowsAsync
   ...
 ---tty-stream-chunk-separator
 # traces-in-t-throws › throwsAsync
-not ok 21 - traces-in-t-throws › throwsAsync
+not ok 22 - traces-in-t-throws › throwsAsync
   ---
     name: AssertionError
     assertion: throwsAsync
@@ -276,7 +296,7 @@ not ok 21 - traces-in-t-throws › throwsAsync
   ...
 ---tty-stream-chunk-separator
 # traces-in-t-throws › throwsAsync different error
-not ok 22 - traces-in-t-throws › throwsAsync different error
+not ok 23 - traces-in-t-throws › throwsAsync different error
   ---
     name: AssertionError
     assertion: throwsAsync
@@ -296,27 +316,27 @@ not ok 22 - traces-in-t-throws › throwsAsync different erro
   ...
 ---tty-stream-chunk-separator
 # uncaught-exception › passes
-ok 23 - uncaught-exception › passes
+ok 24 - uncaught-exception › passes
 ---tty-stream-chunk-separator
 # Error: Can’t catch me
-not ok 24 - Error: Can’t catch me
+not ok 25 - Error: Can’t catch me
   ---
     name: Error
     message: Can’t catch me
     at: 'Timeout.setTimeout (test-tap/fixture/report/regular/uncaught-exception.js:5:9)'
   ...
 ---tty-stream-chunk-separator
 # uncaught-exception.js exited with a non-zero exit code: 1
-not ok 25 - uncaught-exception.js exited with a non-zero exit code: 1
+not ok 26 - uncaught-exception.js exited with a non-zero exit code: 1
 ---tty-stream-chunk-separator
 # unhandled-rejection › passes
-ok 26 - unhandled-rejection › passes
+ok 27 - unhandled-rejection › passes
 ---tty-stream-chunk-separator
 # unhandled-rejection › unhandled non-error rejection
-ok 27 - unhandled-rejection › unhandled non-error rejection
+ok 28 - unhandled-rejection › unhandled non-error rejection
 ---tty-stream-chunk-separator
 # Error: Can’t catch me
-not ok 28 - Error: Can’t catch me
+not ok 29 - Error: Can’t catch me
   ---
     name: Error
     message: Can’t catch me
@@ -326,17 +346,17 @@ not ok 28 - Error: Can’t catch me
   ...
 ---tty-stream-chunk-separator
 # unhandled-rejection
-not ok 29 - unhandled-rejection
+not ok 30 - unhandled-rejection
   ---
     message: Non-error object
     formatted: 'null'
   ...
 ---tty-stream-chunk-separator
 
-1..23
-# tests 22
+1..24
+# tests 23
 # pass 6
 # skip 1
-# fail 22
+# fail 23
 
 ---tty-stream-chunk-separator

test-tap/reporters/tap.regular.v12.log

@@ -35,6 +35,24 @@ not ok 3 - nested-objects › format with max depth 4
     at: 'test-tap/fixture/report/regular/nested-objects.js:28:4'
   ...
 ---tty-stream-chunk-separator
+# nested-objects › format like with max depth 4
+not ok 4 - nested-objects › format like with max depth 4
+  ---
+    name: AssertionError
+    assertion: like
+    values:
+      'Difference:': |2-
+          {
+            a: {
+              b: {
+        -       foo: 'bar',
+        +       foo: 'qux',
+              },
+            },
+          }
+    at: 'test-tap/fixture/report/regular/nested-objects.js:54:4'
+  ...
+---tty-stream-chunk-separator
 # output-in-hook › before hook
 ---tty-stream-chunk-separator
 # output-in-hook › before hook
@@ -50,10 +68,10 @@ not ok 3 - nested-objects › format with max depth 4
   # beforeEach
 ---tty-stream-chunk-separator
 # output-in-hook › passing test
-ok 4 - output-in-hook › passing test
+ok 5 - output-in-hook › passing test
 ---tty-stream-chunk-separator
 # output-in-hook › failing test
-not ok 5 - output-in-hook › failing test
+not ok 6 - output-in-hook › failing test
   ---
     name: AssertionError
     message: Test failed via `t.fail()`
@@ -78,16 +96,16 @@ not ok 5 - output-in-hook › failing test
   # afterAlways
 ---tty-stream-chunk-separator
 # test › skip
-ok 6 - test › skip # SKIP
+ok 7 - test › skip # SKIP
 ---tty-stream-chunk-separator
 # test › todo
-not ok 7 - test › todo # TODO
+not ok 8 - test › todo # TODO
 ---tty-stream-chunk-separator
 # test › passes
-ok 8 - test › passes
+ok 9 - test › passes
 ---tty-stream-chunk-separator
 # test › fails
-not ok 9 - test › fails
+not ok 10 - test › fails
   ---
     name: AssertionError
     message: Test failed via `t.fail()`
@@ -96,10 +114,10 @@ not ok 9 - test › fails
   ...
 ---tty-stream-chunk-separator
 # test › known failure
-ok 10 - test › known failure
+ok 11 - test › known failure
 ---tty-stream-chunk-separator
 # test › no longer failing
-not ok 11 - test › no longer failing
+not ok 12 - test › no longer failing
   ---
     name: Error
     message: >-
@@ -109,7 +127,7 @@ not ok 11 - test › no longer failing
   ...
 ---tty-stream-chunk-separator
 # test › logs
-not ok 12 - test › logs
+not ok 13 - test › logs
   * hello
   * world
   ---
@@ -120,7 +138,7 @@ not ok 12 - test › logs
   ...
 ---tty-stream-chunk-separator
 # test › formatted
-not ok 13 - test › formatted
+not ok 14 - test › formatted
   ---
     name: AssertionError
     assertion: deepEqual
@@ -132,7 +150,7 @@ not ok 13 - test › formatted
   ...
 ---tty-stream-chunk-separator
 # test › power-assert
-not ok 14 - test › power-assert
+not ok 15 - test › power-assert
   ---
     name: AssertionError
     assertion: assert
@@ -143,7 +161,7 @@ not ok 14 - test › power-assert
   ...
 ---tty-stream-chunk-separator
 # test › bad throws
-not ok 15 - test › bad throws
+not ok 16 - test › bad throws
   ---
     name: AssertionError
     message: Improper usage of `t.throws()` detected
@@ -159,7 +177,7 @@ not ok 15 - test › bad throws
   ...
 ---tty-stream-chunk-separator
 # test › bad notThrows
-not ok 16 - test › bad notThrows
+not ok 17 - test › bad notThrows
   ---
     name: AssertionError
     message: Improper usage of `t.notThrows()` detected
@@ -175,7 +193,7 @@ not ok 16 - test › bad notThrows
   ...
 ---tty-stream-chunk-separator
 # test › implementation throws non-error
-not ok 17 - test › implementation throws non-error
+not ok 18 - test › implementation throws non-error
   ---
     name: AssertionError
     message: Error thrown in test
@@ -185,7 +203,7 @@ not ok 17 - test › implementation throws non-error
   ...
 ---tty-stream-chunk-separator
 # traces-in-t-throws › throws
-not ok 18 - traces-in-t-throws › throws
+not ok 19 - traces-in-t-throws › throws
   ---
     name: AssertionError
     assertion: throws
@@ -202,7 +220,7 @@ not ok 18 - traces-in-t-throws › throws
   ...
 ---tty-stream-chunk-separator
 # traces-in-t-throws › notThrows
-not ok 19 - traces-in-t-throws › notThrows
+not ok 20 - traces-in-t-throws › notThrows
   ---
     name: AssertionError
     assertion: notThrows
@@ -218,7 +236,7 @@ not ok 19 - traces-in-t-throws › notThrows
   ...
 ---tty-stream-chunk-separator
 # traces-in-t-throws › notThrowsAsync
-not ok 20 - traces-in-t-throws › notThrowsAsync
+not ok 21 - traces-in-t-throws › notThrowsAsync
   ---
     name: AssertionError
     assertion: notThrowsAsync
@@ -234,7 +252,7 @@ not ok 20 - traces-in-t-throws › notThrowsAsync
   ...
 ---tty-stream-chunk-separator
 # traces-in-t-throws › throwsAsync
-not ok 21 - traces-in-t-throws › throwsAsync
+not ok 22 - traces-in-t-throws › throwsAsync
   ---
     name: AssertionError
     assertion: throwsAsync
@@ -253,7 +271,7 @@ not ok 21 - traces-in-t-throws › throwsAsync
   ...
 ---tty-stream-chunk-separator
 # traces-in-t-throws › throwsAsync different error
-not ok 22 - traces-in-t-throws › throwsAsync different error
+not ok 23 - traces-in-t-throws › throwsAsync different error
   ---
     name: AssertionError
     assertion: throwsAsync
@@ -271,10 +289,10 @@ not ok 22 - traces-in-t-throws › throwsAsync different erro
   ...
 ---tty-stream-chunk-separator
 # uncaught-exception › passes
-ok 23 - uncaught-exception › passes
+ok 24 - uncaught-exception › passes
 ---tty-stream-chunk-separator
 # Error: Can’t catch me
-not ok 24 - Error: Can’t catch me
+not ok 25 - Error: Can’t catch me
   ---
     name: Error
     message: Can’t catch me
@@ -285,34 +303,34 @@ not ok 24 - Error: Can’t catch me
   ...
 ---tty-stream-chunk-separator
 # uncaught-exception.js exited with a non-zero exit code: 1
-not ok 25 - uncaught-exception.js exited with a non-zero exit code: 1
+not ok 26 - uncaught-exception.js exited with a non-zero exit code: 1
 ---tty-stream-chunk-separator
 # unhandled-rejection › passes
-ok 26 - unhandled-rejection › passes
+ok 27 - unhandled-rejection › passes
 ---tty-stream-chunk-separator
 # unhandled-rejection › unhandled non-error rejection
-ok 27 - unhandled-rejection › unhandled non-error rejection
+ok 28 - unhandled-rejection › unhandled non-error rejection
 ---tty-stream-chunk-separator
 # Error: Can’t catch me
-not ok 28 - Error: Can’t catch me
+not ok 29 - Error: Can’t catch me
   ---
     name: Error
     message: Can’t catch me
     at: 'passes (test-tap/fixture/report/regular/unhandled-rejection.js:4:17)'
   ...
 ---tty-stream-chunk-separator
 # unhandled-rejection
-not ok 29 - unhandled-rejection
+not ok 30 - unhandled-rejection
   ---
     message: Non-error object
     formatted: 'null'
   ...
 ---tty-stream-chunk-separator
 
-1..23
-# tests 22
+1..24
+# tests 23
 # pass 6
 # skip 1
-# fail 22
+# fail 23
 
 ---tty-stream-chunk-separator

test-tap/reporters/tap.regular.v13.log

@@ -35,6 +35,24 @@ not ok 3 - nested-objects › format with max depth 4
     at: 'test-tap/fixture/report/regular/nested-objects.js:28:4'
   ...
 ---tty-stream-chunk-separator
+# nested-objects › format like with max depth 4
+not ok 4 - nested-objects › format like with max depth 4
+  ---
+    name: AssertionError
+    assertion: like
+    values:
+      'Difference:': |2-
+          {
+            a: {
+              b: {
+        -       foo: 'bar',
+        +       foo: 'qux',
+              },
+            },
+          }
+    at: 'test-tap/fixture/report/regular/nested-objects.js:54:4'
+  ...
+---tty-stream-chunk-separator
 # output-in-hook › before hook
 ---tty-stream-chunk-separator
 # output-in-hook › before hook
@@ -50,10 +68,10 @@ not ok 3 - nested-objects › format with max depth 4
   # beforeEach
 ---tty-stream-chunk-separator
 # output-in-hook › passing test
-ok 4 - output-in-hook › passing test
+ok 5 - output-in-hook › passing test
 ---tty-stream-chunk-separator
 # output-in-hook › failing test
-not ok 5 - output-in-hook › failing test
+not ok 6 - output-in-hook › failing test
   ---
     name: AssertionError
     message: Test failed via `t.fail()`
@@ -78,16 +96,16 @@ not ok 5 - output-in-hook › failing test
   # afterAlways
 ---tty-stream-chunk-separator
 # test › skip
-ok 6 - test › skip # SKIP
+ok 7 - test › skip # SKIP
 ---tty-stream-chunk-separator
 # test › todo
-not ok 7 - test › todo # TODO
+not ok 8 - test › todo # TODO
 ---tty-stream-chunk-separator
 # test › passes
-ok 8 - test › passes
+ok 9 - test › passes
 ---tty-stream-chunk-separator
 # test › fails
-not ok 9 - test › fails
+not ok 10 - test › fails
   ---
     name: AssertionError
     message: Test failed via `t.fail()`
@@ -96,10 +114,10 @@ not ok 9 - test › fails
   ...
 ---tty-stream-chunk-separator
 # test › known failure
-ok 10 - test › known failure
+ok 11 - test › known failure
 ---tty-stream-chunk-separator
 # test › no longer failing
-not ok 11 - test › no longer failing
+not ok 12 - test › no longer failing
   ---
     name: Error
     message: >-
@@ -109,7 +127,7 @@ not ok 11 - test › no longer failing
   ...
 ---tty-stream-chunk-separator
 # test › logs
-not ok 12 - test › logs
+not ok 13 - test › logs
   * hello
   * world
   ---
@@ -120,7 +138,7 @@ not ok 12 - test › logs
   ...
 ---tty-stream-chunk-separator
 # test › formatted
-not ok 13 - test › formatted
+not ok 14 - test › formatted
   ---
     name: AssertionError
     assertion: deepEqual
@@ -132,7 +150,7 @@ not ok 13 - test › formatted
   ...
 ---tty-stream-chunk-separator
 # test › power-assert
-not ok 14 - test › power-assert
+not ok 15 - test › power-assert
   ---
     name: AssertionError
     assertion: assert
@@ -143,7 +161,7 @@ not ok 14 - test › power-assert
   ...
 ---tty-stream-chunk-separator
 # test › bad throws
-not ok 15 - test › bad throws
+not ok 16 - test › bad throws
   ---
     name: AssertionError
     message: Improper usage of `t.throws()` detected
@@ -159,7 +177,7 @@ not ok 15 - test › bad throws
   ...
 ---tty-stream-chunk-separator
 # test › bad notThrows
-not ok 16 - test › bad notThrows
+not ok 17 - test › bad notThrows
   ---
     name: AssertionError
     message: Improper usage of `t.notThrows()` detected
@@ -175,7 +193,7 @@ not ok 16 - test › bad notThrows
   ...
 ---tty-stream-chunk-separator
 # test › implementation throws non-error
-not ok 17 - test › implementation throws non-error
+not ok 18 - test › implementation throws non-error
   ---
     name: AssertionError
     message: Error thrown in test
@@ -185,7 +203,7 @@ not ok 17 - test › implementation throws non-error
   ...
 ---tty-stream-chunk-separator
 # traces-in-t-throws › throws
-not ok 18 - traces-in-t-throws › throws
+not ok 19 - traces-in-t-throws › throws
   ---
     name: AssertionError
     assertion: throws
@@ -202,7 +220,7 @@ not ok 18 - traces-in-t-throws › throws
   ...
 ---tty-stream-chunk-separator
 # traces-in-t-throws › notThrows
-not ok 19 - traces-in-t-throws › notThrows
+not ok 20 - traces-in-t-throws › notThrows
   ---
     name: AssertionError
     assertion: notThrows
@@ -218,7 +236,7 @@ not ok 19 - traces-in-t-throws › notThrows
   ...
 ---tty-stream-chunk-separator
 # traces-in-t-throws › notThrowsAsync
-not ok 20 - traces-in-t-throws › notThrowsAsync
+not ok 21 - traces-in-t-throws › notThrowsAsync
   ---
     name: AssertionError
     assertion: notThrowsAsync
@@ -234,7 +252,7 @@ not ok 20 - traces-in-t-throws › notThrowsAsync
   ...
 ---tty-stream-chunk-separator
 # traces-in-t-throws › throwsAsync
-not ok 21 - traces-in-t-throws › throwsAsync
+not ok 22 - traces-in-t-throws › throwsAsync
   ---
     name: AssertionError
     assertion: throwsAsync
@@ -253,7 +271,7 @@ not ok 21 - traces-in-t-throws › throwsAsync
   ...
 ---tty-stream-chunk-separator
 # traces-in-t-throws › throwsAsync different error
-not ok 22 - traces-in-t-throws › throwsAsync different error
+not ok 23 - traces-in-t-throws › throwsAsync different error
   ---
     name: AssertionError
     assertion: throwsAsync
@@ -271,10 +289,10 @@ not ok 22 - traces-in-t-throws › throwsAsync different erro
   ...
 ---tty-stream-chunk-separator
 # uncaught-exception › passes
-ok 23 - uncaught-exception › passes
+ok 24 - uncaught-exception › passes
 ---tty-stream-chunk-separator
 # Error: Can’t catch me
-not ok 24 - Error: Can’t catch me
+not ok 25 - Error: Can’t catch me
   ---
     name: Error
     message: Can’t catch me
@@ -285,34 +303,34 @@ not ok 24 - Error: Can’t catch me
   ...
 ---tty-stream-chunk-separator
 # uncaught-exception.js exited with a non-zero exit code: 1
-not ok 25 - uncaught-exception.js exited with a non-zero exit code: 1
+not ok 26 - uncaught-exception.js exited with a non-zero exit code: 1
 ---tty-stream-chunk-separator
 # unhandled-rejection › passes
-ok 26 - unhandled-rejection › passes
+ok 27 - unhandled-rejection › passes
 ---tty-stream-chunk-separator
 # unhandled-rejection › unhandled non-error rejection
-ok 27 - unhandled-rejection › unhandled non-error rejection
+ok 28 - unhandled-rejection › unhandled non-error rejection
 ---tty-stream-chunk-separator
 # Error: Can’t catch me
-not ok 28 - Error: Can’t catch me
+not ok 29 - Error: Can’t catch me
   ---
     name: Error
     message: Can’t catch me
     at: 'passes (test-tap/fixture/report/regular/unhandled-rejection.js:4:17)'
   ...
 ---tty-stream-chunk-separator
 # unhandled-rejection
-not ok 29 - unhandled-rejection
+not ok 30 - unhandled-rejection
   ---
     message: Non-error object
     formatted: 'null'
   ...
 ---tty-stream-chunk-separator
 
-1..23
-# tests 22
+1..24
+# tests 23
 # pass 6
 # skip 1
-# fail 22
+# fail 23
 
 ---tty-stream-chunk-separator

test-tap/reporters/tap.regular.v14.log

@@ -35,6 +35,24 @@ not ok 3 - nested-objects › format with max depth 4
     at: 'test-tap/fixture/report/regular/nested-objects.js:28:4'
   ...
 ---tty-stream-chunk-separator
+# nested-objects › format like with max depth 4
+not ok 4 - nested-objects › format like with max depth 4
+  ---
+    name: AssertionError
+    assertion: like
+    values:
+      'Difference:': |2-
+          {
+            a: {
+              b: {
+        -       foo: 'bar',
+        +       foo: 'qux',
+              },
+            },
+          }
+    at: 'test-tap/fixture/report/regular/nested-objects.js:54:4'
+  ...
+---tty-stream-chunk-separator
 # output-in-hook › before hook
 ---tty-stream-chunk-separator
 # output-in-hook › before hook
@@ -50,10 +68,10 @@ not ok 3 - nested-objects › format with max depth 4
   # beforeEach
 ---tty-stream-chunk-separator
 # output-in-hook › passing test
-ok 4 - output-in-hook › passing test
+ok 5 - output-in-hook › passing test
 ---tty-stream-chunk-separator
 # output-in-hook › failing test
-not ok 5 - output-in-hook › failing test
+not ok 6 - output-in-hook › failing test
   ---
     name: AssertionError
     message: Test failed via `t.fail()`
@@ -78,16 +96,16 @@ not ok 5 - output-in-hook › failing test
   # afterAlways
 ---tty-stream-chunk-separator
 # test › skip
-ok 6 - test › skip # SKIP
+ok 7 - test › skip # SKIP
 ---tty-stream-chunk-separator
 # test › todo
-not ok 7 - test › todo # TODO
+not ok 8 - test › todo # TODO
 ---tty-stream-chunk-separator
 # test › passes
-ok 8 - test › passes
+ok 9 - test › passes
 ---tty-stream-chunk-separator
 # test › fails
-not ok 9 - test › fails
+not ok 10 - test › fails
   ---
     name: AssertionError
     message: Test failed via `t.fail()`
@@ -96,10 +114,10 @@ not ok 9 - test › fails
   ...
 ---tty-stream-chunk-separator
 # test › known failure
-ok 10 - test › known failure
+ok 11 - test › known failure
 ---tty-stream-chunk-separator
 # test › no longer failing
-not ok 11 - test › no longer failing
+not ok 12 - test › no longer failing
   ---
     name: Error
     message: >-
@@ -109,7 +127,7 @@ not ok 11 - test › no longer failing
   ...
 ---tty-stream-chunk-separator
 # test › logs
-not ok 12 - test › logs
+not ok 13 - test › logs
   * hello
   * world
   ---
@@ -120,7 +138,7 @@ not ok 12 - test › logs
   ...
 ---tty-stream-chunk-separator
 # test › formatted
-not ok 13 - test › formatted
+not ok 14 - test › formatted
   ---
     name: AssertionError
     assertion: deepEqual
@@ -132,7 +150,7 @@ not ok 13 - test › formatted
   ...
 ---tty-stream-chunk-separator
 # test › power-assert
-not ok 14 - test › power-assert
+not ok 15 - test › power-assert
   ---
     name: AssertionError
     assertion: assert
@@ -143,7 +161,7 @@ not ok 14 - test › power-assert
   ...
 ---tty-stream-chunk-separator
 # test › bad throws
-not ok 15 - test › bad throws
+not ok 16 - test › bad throws
   ---
     name: AssertionError
     message: Improper usage of `t.throws()` detected
@@ -159,7 +177,7 @@ not ok 15 - test › bad throws
   ...
 ---tty-stream-chunk-separator
 # test › bad notThrows
-not ok 16 - test › bad notThrows
+not ok 17 - test › bad notThrows
   ---
     name: AssertionError
     message: Improper usage of `t.notThrows()` detected
@@ -175,7 +193,7 @@ not ok 16 - test › bad notThrows
   ...
 ---tty-stream-chunk-separator
 # test › implementation throws non-error
-not ok 17 - test › implementation throws non-error
+not ok 18 - test › implementation throws non-error
   ---
     name: AssertionError
     message: Error thrown in test
@@ -185,7 +203,7 @@ not ok 17 - test › implementation throws non-error
   ...
 ---tty-stream-chunk-separator
 # traces-in-t-throws › throws
-not ok 18 - traces-in-t-throws › throws
+not ok 19 - traces-in-t-throws › throws
   ---
     name: AssertionError
     assertion: throws
@@ -202,7 +220,7 @@ not ok 18 - traces-in-t-throws › throws
   ...
 ---tty-stream-chunk-separator
 # traces-in-t-throws › notThrows
-not ok 19 - traces-in-t-throws › notThrows
+not ok 20 - traces-in-t-throws › notThrows
   ---
     name: AssertionError
     assertion: notThrows
@@ -218,7 +236,7 @@ not ok 19 - traces-in-t-throws › notThrows
   ...
 ---tty-stream-chunk-separator
 # traces-in-t-throws › notThrowsAsync
-not ok 20 - traces-in-t-throws › notThrowsAsync
+not ok 21 - traces-in-t-throws › notThrowsAsync
   ---
     name: AssertionError
     assertion: notThrowsAsync
@@ -234,7 +252,7 @@ not ok 20 - traces-in-t-throws › notThrowsAsync
   ...
 ---tty-stream-chunk-separator
 # traces-in-t-throws › throwsAsync
-not ok 21 - traces-in-t-throws › throwsAsync
+not ok 22 - traces-in-t-throws › throwsAsync
   ---
     name: AssertionError
     assertion: throwsAsync
@@ -253,7 +271,7 @@ not ok 21 - traces-in-t-throws › throwsAsync
   ...
 ---tty-stream-chunk-separator
 # traces-in-t-throws › throwsAsync different error
-not ok 22 - traces-in-t-throws › throwsAsync different error
+not ok 23 - traces-in-t-throws › throwsAsync different error
   ---
     name: AssertionError
     assertion: throwsAsync
@@ -271,10 +289,10 @@ not ok 22 - traces-in-t-throws › throwsAsync different erro
   ...
 ---tty-stream-chunk-separator
 # uncaught-exception › passes
-ok 23 - uncaught-exception › passes
+ok 24 - uncaught-exception › passes
 ---tty-stream-chunk-separator
 # Error: Can’t catch me
-not ok 24 - Error: Can’t catch me
+not ok 25 - Error: Can’t catch me
   ---
     name: Error
     message: Can’t catch me
@@ -285,34 +303,34 @@ not ok 24 - Error: Can’t catch me
   ...
 ---tty-stream-chunk-separator
 # uncaught-exception.js exited with a non-zero exit code: 1
-not ok 25 - uncaught-exception.js exited with a non-zero exit code: 1
+not ok 26 - uncaught-exception.js exited with a non-zero exit code: 1
 ---tty-stream-chunk-separator
 # unhandled-rejection › passes
-ok 26 - unhandled-rejection › passes
+ok 27 - unhandled-rejection › passes
 ---tty-stream-chunk-separator
 # unhandled-rejection › unhandled non-error rejection
-ok 27 - unhandled-rejection › unhandled non-error rejection
+ok 28 - unhandled-rejection › unhandled non-error rejection
 ---tty-stream-chunk-separator
 # Error: Can’t catch me
-not ok 28 - Error: Can’t catch me
+not ok 29 - Error: Can’t catch me
   ---
     name: Error
     message: Can’t catch me
     at: 'passes (test-tap/fixture/report/regular/unhandled-rejection.js:4:17)'
   ...
 ---tty-stream-chunk-separator
 # unhandled-rejection
-not ok 29 - unhandled-rejection
+not ok 30 - unhandled-rejection
   ---
     message: Non-error object
     formatted: 'null'
   ...
 ---tty-stream-chunk-separator
 
-1..23
-# tests 22
+1..24
+# tests 23
 # pass 6
 # skip 1
-# fail 22
+# fail 23
 
 ---tty-stream-chunk-separator

test-tap/reporters/verbose.regular.v10.log

@@ -16,6 +16,8 @@
   ✖ bad-test-chain.js exited with a non-zero exit code: 1
 ---tty-stream-chunk-separator
   ✖ nested-objects › format with max depth 4 
+---tty-stream-chunk-separator
+  ✖ nested-objects › format like with max depth 4 
 ---tty-stream-chunk-separator
     output-in-hook › before hook
     ℹ before
@@ -152,6 +154,30 @@
 
 
 
+  nested-objects › format like with max depth 4
+
+  nested-objects.js:54
+
+   53:   };                      
+   54:   t.like(actual, pattern);
+   55: });                       
+
+  Difference:
+
+    {
+      a: {
+        b: {
+  -       foo: 'bar',
+  +       foo: 'qux',
+        },
+      },
+    }
+
+  › t (test-tap/fixture/report/regular/nested-objects.js:54:4)
+  › process._tickCallback (internal/process/next_tick.js:68:7)
+
+
+
   output-in-hook › failing test
 
   output-in-hook.js:34
@@ -428,7 +454,7 @@
 
   ─
 
-  15 tests failed
+  16 tests failed
   1 known failure
   1 test skipped
   1 test todo

test-tap/reporters/verbose.regular.v12.log

@@ -16,6 +16,8 @@
   ✖ bad-test-chain.js exited with a non-zero exit code: 1
 ---tty-stream-chunk-separator
   ✖ nested-objects › format with max depth 4 
+---tty-stream-chunk-separator
+  ✖ nested-objects › format like with max depth 4 
 ---tty-stream-chunk-separator
     output-in-hook › before hook
     ℹ before
@@ -152,6 +154,29 @@
 
 
 
+  nested-objects › format like with max depth 4
+
+  nested-objects.js:54
+
+   53:   };                      
+   54:   t.like(actual, pattern);
+   55: });                       
+
+  Difference:
+
+    {
+      a: {
+        b: {
+  -       foo: 'bar',
+  +       foo: 'qux',
+        },
+      },
+    }
+
+  › test-tap/fixture/report/regular/nested-objects.js:54:4
+
+
+
   output-in-hook › failing test
 
   output-in-hook.js:34
@@ -412,7 +437,7 @@
 
   ─
 
-  15 tests failed
+  16 tests failed
   1 known failure
   1 test skipped
   1 test todo

test-tap/reporters/verbose.regular.v13.log

@@ -16,6 +16,8 @@
   ✖ bad-test-chain.js exited with a non-zero exit code: 1
 ---tty-stream-chunk-separator
   ✖ nested-objects › format with max depth 4 
+---tty-stream-chunk-separator
+  ✖ nested-objects › format like with max depth 4 
 ---tty-stream-chunk-separator
     output-in-hook › before hook
     ℹ before
@@ -152,6 +154,29 @@
 
 
 
+  nested-objects › format like with max depth 4
+
+  nested-objects.js:54
+
+   53:   };                      
+   54:   t.like(actual, pattern);
+   55: });                       
+
+  Difference:
+
+    {
+      a: {
+        b: {
+  -       foo: 'bar',
+  +       foo: 'qux',
+        },
+      },
+    }
+
+  › test-tap/fixture/report/regular/nested-objects.js:54:4
+
+
+
   output-in-hook › failing test
 
   output-in-hook.js:34
@@ -412,7 +437,7 @@
 
   ─
 
-  15 tests failed
+  16 tests failed
   1 known failure
   1 test skipped
   1 test todo

test-tap/reporters/verbose.regular.v14.log

@@ -16,6 +16,8 @@
   ✖ bad-test-chain.js exited with a non-zero exit code: 1
 ---tty-stream-chunk-separator
   ✖ nested-objects › format with max depth 4 
+---tty-stream-chunk-separator
+  ✖ nested-objects › format like with max depth 4 
 ---tty-stream-chunk-separator
     output-in-hook › before hook
     ℹ before
@@ -152,6 +154,29 @@
 
 
 
+  nested-objects › format like with max depth 4
+
+  nested-objects.js:54
+
+   53:   };                      
+   54:   t.like(actual, pattern);
+   55: });                       
+
+  Difference:
+
+    {
+      a: {
+        b: {
+  -       foo: 'bar',
+  +       foo: 'qux',
+        },
+      },
+    }
+
+  › test-tap/fixture/report/regular/nested-objects.js:54:4
+
+
+
   output-in-hook › failing test
 
   output-in-hook.js:34
@@ -412,7 +437,7 @@
 
   ─
 
-  15 tests failed
+  16 tests failed
   1 known failure
   1 test skipped
   1 test todo

test-tap/test.js

@@ -360,13 +360,14 @@ test('fails with thrown non-error object', t => {
 
 test('skipped assertions count towards the plan', t => {
 	const instance = ava(a => {
-		a.plan(15);
+		a.plan(16);
 		a.pass.skip();
 		a.fail.skip();
 		a.is.skip(1, 1);
 		a.not.skip(1, 2);
 		a.deepEqual.skip({foo: 'bar'}, {foo: 'bar'});
 		a.notDeepEqual.skip({foo: 'bar'}, {baz: 'thud'});
+		a.like.skip({foo: 'bar'}, {foo: 'bar'});
 		a.throws.skip(() => {
 			throw new Error(); // eslint-disable-line unicorn/error-message
 		});
@@ -381,20 +382,21 @@ test('skipped assertions count towards the plan', t => {
 	});
 	return instance.run().then(result => {
 		t.is(result.passed, true);
-		t.is(instance.planCount, 15);
-		t.is(instance.assertCount, 15);
+		t.is(instance.planCount, 16);
+		t.is(instance.assertCount, 16);
 	});
 });
 
 test('assertion.skip() is bound', t => {
 	const instance = ava(a => {
-		a.plan(15);
+		a.plan(16);
 		(a.pass.skip)();
 		(a.fail.skip)();
 		(a.is.skip)(1, 1);
 		(a.not.skip)(1, 2);
 		(a.deepEqual.skip)({foo: 'bar'}, {foo: 'bar'});
 		(a.notDeepEqual.skip)({foo: 'bar'}, {baz: 'thud'});
+		(a.like.skip)({foo: 'bar'}, {foo: 'bar'});
 		(a.throws.skip)(() => {
 			throw new Error(); // eslint-disable-line unicorn/error-message
 		});
@@ -409,8 +411,8 @@ test('assertion.skip() is bound', t => {
 	});
 	return instance.run().then(result => {
 		t.is(result.passed, true);
-		t.is(instance.planCount, 15);
-		t.is(instance.assertCount, 15);
+		t.is(instance.planCount, 16);
+		t.is(instance.assertCount, 16);
 	});
 });
 
@@ -646,13 +648,14 @@ test('log from tests', t => {
 
 test('assertions are bound', t => {
 	// This does not test .fail() and .snapshot(). It'll suffice.
-	return ava(a => {
-		(a.plan)(13);
+	return withExperiments({likeAssertion: true})(a => {
+		(a.plan)(14);
 		(a.pass)();
 		(a.is)(1, 1);
 		(a.not)(1, 2);
 		(a.deepEqual)({foo: 'bar'}, {foo: 'bar'});
 		(a.notDeepEqual)({foo: 'bar'}, {baz: 'thud'});
+		(a.like)({foo: 'bar'}, {foo: 'bar'});
 		(a.throws)(() => {
 			throw new Error(); // eslint-disable-line unicorn/error-message
 		});

test/assertions/fixtures/happy-path.js

@@ -11,6 +11,22 @@ test(passes, 'is', 1, 1);
 test(passes, 'not', 1, 2);
 test(passes, 'deepEqual', {foo: 'bar'}, {foo: 'bar'});
 test(passes, 'notDeepEqual', {foo: 'bar'}, {foo: 'baz'});
+test(passes, 'like', {
+	foo: 'bar',
+	deep: {
+		buz: 'qux',
+		extra: 'irrelevant'
+	},
+	extra: 'irrelevant',
+	deepExtra: {
+		extra: 'irrelevant'
+	}
+}, {
+	foo: 'bar',
+	deep: {
+		buz: 'qux'
+	}
+});
 test(passes, 'throws', () => {
 	throw new Error('error');
 });

test/assertions/fixtures/package.json

@@ -2,7 +2,10 @@
   "ava": {
     "files": [
       "*.js"
-    ]
+    ],
+    "nonSemVerExperiments": {
+      "likeAssertion": true
+    }
   },
   "dependencies": {
     "ava": "file:../../.."

test/assertions/snapshots/test.js.md

@@ -14,6 +14,7 @@ Generated by [AVA](https://avajs.dev).
       't.false(false) passes',
       't.falsy("") passes',
       't.is(1, 1) passes',
+      't.like({"foo":"bar","deep":{"buz":"qux","extra":"irrelevant"},"extra":"irrelevant","deepExtra":{"extra":"irrelevant"}}, {"foo":"bar","deep":{"buz":"qux"}}) passes',
       't.not(1, 2) passes',
       't.notDeepEqual({"foo":"bar"}, {"foo":"baz"}) passes',
       't.notRegex("bar", {}) passes',