/
test.ts
1653 lines (1456 loc) · 32.3 KB
/
test.ts
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import fs = require('fs');
import net = require('net');
import Stream = require('stream');
import {inspect} from 'util';
import test, {ExecutionContext} from 'ava';
import {JSDOM} from 'jsdom';
import {Subject, Observable} from 'rxjs';
import tempy = require('tempy');
import ZenObservable = require('zen-observable');
import is, {assert, AssertionTypeDescription, Primitive, TypedArray, TypeName} from '../source';
class PromiseSubclassFixture<T> extends Promise<T> {}
class ErrorSubclassFixture extends Error {}
const {window} = new JSDOM();
const {document} = window;
const createDomElement = (element: string) => document.createElement(element);
interface Test {
assert: (...args: any[]) => void | never;
fixtures: unknown[];
typename?: TypeName;
typeDescription?: AssertionTypeDescription | TypeName;
is(value: unknown): boolean;
}
const invertAssertThrow = (description: string, fn: () => void | never, value: unknown): void | never => {
const expectedAssertErrorMessage = `Expected value which is \`${description}\`, received value of type \`${is(value)}\`.`;
try {
fn();
} catch (error) {
if (error instanceof TypeError && error.message.includes(expectedAssertErrorMessage)) {
return;
}
throw error;
}
throw new Error(`Function did not throw any error, expected: ${expectedAssertErrorMessage}`);
};
const types = new Map<string, Test>([
['undefined', {
is: is.undefined,
assert: assert.undefined,
fixtures: [
undefined
],
typename: 'undefined'
}],
['null', {
is: is.null_,
assert: assert.null_,
fixtures: [
null
],
typename: 'null'
}],
['string', {
is: is.string,
assert: assert.string,
fixtures: [
'🦄',
'hello world',
''
],
typename: 'string'
}],
['emptyString', {
is: is.emptyString,
assert: assert.emptyString,
fixtures: [
'',
String()
],
typename: 'string',
typeDescription: AssertionTypeDescription.emptyString
}],
['number', {
is: is.number,
assert: assert.number,
fixtures: [
6,
1.4,
0,
-0,
Infinity,
-Infinity
],
typename: 'number'
}],
['bigint', {
is: is.bigint,
assert: assert.bigint,
fixtures: [
// Disabled until TS supports it for an ESnnnn target.
// 1n,
// 0n,
// -0n,
BigInt('1234')
],
typename: 'bigint'
}],
['boolean', {
is: is.boolean,
assert: assert.boolean,
fixtures: [
true, false
],
typename: 'boolean'
}],
['symbol', {
is: is.symbol,
assert: assert.symbol,
fixtures: [
Symbol('🦄')
],
typename: 'symbol'
}],
['numericString', {
is: is.numericString,
assert: assert.numericString,
fixtures: [
'5',
'-3.2',
'Infinity',
'0x56'
],
typename: 'string',
typeDescription: AssertionTypeDescription.numericString
}],
['array', {
is: is.array,
assert: assert.array,
fixtures: [
[1, 2],
new Array(2)
],
typename: 'Array'
}],
['emptyArray', {
is: is.emptyArray,
assert: assert.emptyArray,
fixtures: [
[],
new Array() // eslint-disable-line @typescript-eslint/no-array-constructor
],
typename: 'Array',
typeDescription: AssertionTypeDescription.emptyArray
}],
['function', {
is: is.function_,
assert: assert.function_,
fixtures: [
function foo() {}, // eslint-disable-line func-names
function () {},
() => {},
async function () {},
function * (): unknown {},
async function * (): unknown {}
],
typename: 'Function'
}],
['buffer', {
is: is.buffer,
assert: assert.buffer,
fixtures: [
Buffer.from('🦄')
],
typename: 'Buffer'
}],
['object', {
is: is.object,
assert: assert.object,
fixtures: [
{x: 1},
Object.create({x: 1})
],
typename: 'Object'
}],
['regExp', {
is: is.regExp,
assert: assert.regExp,
fixtures: [
/\w/,
new RegExp('\\w') // eslint-disable-line prefer-regex-literals
],
typename: 'RegExp'
}],
['date', {
is: is.date,
assert: assert.date,
fixtures: [
new Date()
],
typename: 'Date'
}],
['error', {
is: is.error,
assert: assert.error,
fixtures: [
new Error('🦄'),
new ErrorSubclassFixture()
],
typename: 'Error'
}],
['nativePromise', {
is: is.nativePromise,
assert: assert.nativePromise,
fixtures: [
Promise.resolve(),
PromiseSubclassFixture.resolve()
],
typename: 'Promise',
typeDescription: AssertionTypeDescription.nativePromise
}],
['promise', {
is: is.promise,
assert: assert.promise,
fixtures: [
{then() {}, catch() {}}
],
typename: 'Object',
typeDescription: 'Promise'
}],
['generator', {
is: is.generator,
assert: assert.generator,
fixtures: [
(function * () {
yield 4;
})()
],
typename: 'Generator'
}],
['asyncGenerator', {
is: is.asyncGenerator,
assert: assert.asyncGenerator,
fixtures: [
(async function * () {
yield 4;
})()
],
typename: 'AsyncGenerator'
}],
['generatorFunction', {
is: is.generatorFunction,
assert: assert.generatorFunction,
fixtures: [
function * () {
yield 4;
}
],
typename: 'Function',
typeDescription: 'GeneratorFunction'
}],
['asyncGeneratorFunction', {
is: is.asyncGeneratorFunction,
assert: assert.asyncGeneratorFunction,
fixtures: [
async function * () {
yield 4;
}
],
typename: 'Function',
typeDescription: 'AsyncGeneratorFunction'
}],
['asyncFunction', {
is: is.asyncFunction,
assert: assert.asyncFunction,
fixtures: [
async function () {},
async () => {}
],
typename: 'Function',
typeDescription: 'AsyncFunction'
}],
['boundFunction', {
is: is.boundFunction,
assert: assert.boundFunction,
fixtures: [
() => {},
function () {}.bind(null) // eslint-disable-line no-extra-bind
],
typename: 'Function'
}],
['map', {
is: is.map,
assert: assert.map,
fixtures: [
new Map([['one', '1']])
],
typename: 'Map'
}],
['emptyMap', {
is: is.emptyMap,
assert: assert.emptyMap,
fixtures: [
new Map()
],
typename: 'Map',
typeDescription: AssertionTypeDescription.emptyMap
}],
['set', {
is: is.set,
assert: assert.set,
fixtures: [
new Set(['one'])
],
typename: 'Set'
}],
['emptySet', {
is: is.emptySet,
assert: assert.emptySet,
fixtures: [
new Set()
],
typename: 'Set',
typeDescription: AssertionTypeDescription.emptySet
}],
['weakSet', {
is: is.weakSet,
assert: assert.weakSet,
fixtures: [
new WeakSet()
],
typename: 'WeakSet'
}],
['weakMap', {
is: is.weakMap,
assert: assert.weakMap,
fixtures: [
new WeakMap()
],
typename: 'WeakMap'
}],
['int8Array', {
is: is.int8Array,
assert: assert.int8Array,
fixtures: [
new Int8Array()
],
typename: 'Int8Array'
}],
['uint8Array', {
is: is.uint8Array,
assert: assert.uint8Array,
fixtures: [
new Uint8Array()
],
typename: 'Uint8Array'
}],
['uint8ClampedArray', {
is: is.uint8ClampedArray,
assert: assert.uint8ClampedArray,
fixtures: [
new Uint8ClampedArray()
],
typename: 'Uint8ClampedArray'
}],
['int16Array', {
is: is.int16Array,
assert: assert.int16Array,
fixtures: [
new Int16Array()
],
typename: 'Int16Array'
}],
['uint16Array', {
is: is.uint16Array,
assert: assert.uint16Array,
fixtures: [
new Uint16Array()
],
typename: 'Uint16Array'
}],
['int32Array', {
is: is.int32Array,
assert: assert.int32Array,
fixtures: [
new Int32Array()
],
typename: 'Int32Array'
}],
['uint32Array', {
is: is.uint32Array,
assert: assert.uint32Array,
fixtures: [
new Uint32Array()
],
typename: 'Uint32Array'
}],
['float32Array', {
is: is.float32Array,
assert: assert.float32Array,
fixtures: [
new Float32Array()
],
typename: 'Float32Array'
}],
['float64Array', {
is: is.float64Array,
assert: assert.float64Array,
fixtures: [
new Float64Array()
],
typename: 'Float64Array'
}],
['bigInt64Array', {
is: is.bigInt64Array,
assert: assert.bigInt64Array,
fixtures: [
new BigInt64Array()
],
typename: 'BigInt64Array'
}],
['bigUint64Array', {
is: is.bigUint64Array,
assert: assert.bigUint64Array,
fixtures: [
new BigUint64Array()
],
typename: 'BigUint64Array'
}],
['arrayBuffer', {
is: is.arrayBuffer,
assert: assert.arrayBuffer,
fixtures: [
new ArrayBuffer(10)
],
typename: 'ArrayBuffer'
}],
['dataView', {
is: is.dataView,
assert: assert.dataView,
fixtures: [
new DataView(new ArrayBuffer(10))
],
typename: 'DataView'
}],
['nan', {
is: is.nan,
assert: assert.nan,
fixtures: [
NaN,
Number.NaN
],
typename: 'number',
typeDescription: AssertionTypeDescription.nan
}],
['nullOrUndefined', {
is: is.nullOrUndefined,
assert: assert.nullOrUndefined,
fixtures: [
null,
undefined
],
typeDescription: AssertionTypeDescription.nullOrUndefined
}],
['plainObject', {
is: is.plainObject,
assert: assert.plainObject,
fixtures: [
{x: 1},
Object.create(null),
new Object() // eslint-disable-line no-new-object
],
typename: 'Object',
typeDescription: AssertionTypeDescription.plainObject
}],
['integer', {
is: is.integer,
assert: assert.integer,
fixtures: [
6
],
typename: 'number',
typeDescription: AssertionTypeDescription.integer
}],
['safeInteger', {
is: is.safeInteger,
assert: assert.safeInteger,
fixtures: [
(2 ** 53) - 1,
-(2 ** 53) + 1
],
typename: 'number',
typeDescription: AssertionTypeDescription.safeInteger
}],
['domElement', {
is: is.domElement,
assert: assert.domElement,
fixtures: [
'div',
'input',
'span',
'img',
'canvas',
'script'
].map(createDomElement),
typeDescription: AssertionTypeDescription.domElement
}],
['non-domElements', {
is: value => !is.domElement(value),
assert: (value: unknown) => invertAssertThrow(AssertionTypeDescription.domElement, () => assert.domElement(value), value),
fixtures: [
document.createTextNode('data'),
document.createProcessingInstruction('xml-stylesheet', 'href="mycss.css" type="text/css"'),
document.createComment('This is a comment'),
document,
document.implementation.createDocumentType('svg:svg', '-//W3C//DTD SVG 1.1//EN', 'https://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd'),
document.createDocumentFragment()
]
}],
['observable', {
is: is.observable,
assert: assert.observable,
fixtures: [
new Observable(),
new Subject(),
new ZenObservable(() => {})
],
typename: 'Observable'
}],
['nodeStream', {
is: is.nodeStream,
assert: assert.nodeStream,
fixtures: [
fs.createReadStream('readme.md'),
fs.createWriteStream(tempy.file()),
new net.Socket(),
new Stream.Duplex(),
new Stream.PassThrough(),
new Stream.Readable(),
new Stream.Transform(),
new Stream.Stream(),
new Stream.Writable()
],
typename: 'Object',
typeDescription: AssertionTypeDescription.nodeStream
}],
['infinite', {
is: is.infinite,
assert: assert.infinite,
fixtures: [
Infinity,
-Infinity
],
typename: 'number',
typeDescription: AssertionTypeDescription.infinite
}]
]);
// This ensures a certain method matches only the types it's supposed to and none of the other methods' types
const testType = (t: ExecutionContext, type: string, exclude?: string[]) => {
const testData = types.get(type);
if (testData === undefined) {
t.fail(`is.${type} not defined`);
return;
}
const {is: testIs, assert: testAssert, typename, typeDescription} = testData;
for (const [key, {fixtures}] of types) {
// TODO: Automatically exclude value types in other tests that we have in the current one.
// Could reduce the use of `exclude`.
if (exclude?.includes(key)) {
continue;
}
const isTypeUnderTest = key === type;
const assertIs = isTypeUnderTest ? t.true : t.false;
for (const fixture of fixtures) {
assertIs(testIs(fixture), `Value: ${inspect(fixture)}`);
const valueType = typeDescription ? typeDescription : typename;
if (isTypeUnderTest) {
t.notThrows(() => {
testAssert(fixture);
});
} else {
t.throws(() => {
testAssert(fixture);
}, {
message: `Expected value which is \`${valueType!}\`, received value of type \`${is(fixture)}\`.`
});
}
if (isTypeUnderTest && typename) {
t.is<TypeName>(is(fixture), typename);
}
}
}
};
test('is.undefined', t => {
testType(t, 'undefined', ['nullOrUndefined']);
});
test('is.null', t => {
testType(t, 'null', ['nullOrUndefined']);
});
test('is.string', t => {
testType(t, 'string', ['emptyString', 'numericString']);
});
test('is.number', t => {
testType(t, 'number', ['integer', 'safeInteger', 'infinite']);
});
test('is.bigint', t => {
testType(t, 'bigint');
});
test('is.boolean', t => {
testType(t, 'boolean');
});
test('is.symbol', t => {
testType(t, 'symbol');
});
test('is.numericString', t => {
testType(t, 'numericString');
t.false(is.numericString(''));
t.false(is.numericString(' '));
t.false(is.numericString(' \t\t\n'));
t.false(is.numericString(1));
t.throws(() => {
assert.numericString('');
});
t.throws(() => {
assert.numericString(1);
});
});
test('is.array', t => {
testType(t, 'array', ['emptyArray']);
t.true(is.array([1, 2, 3], is.number));
t.false(is.array([1, '2', 3], is.number));
t.notThrows(() => {
assert.array([1, 2], assert.number);
});
t.throws(() => {
assert.array([1, '2'], assert.number);
});
t.notThrows(() => {
const x: unknown[] = [1, 2, 3];
assert.array(x, assert.number);
x[0].toFixed(0);
});
t.notThrows(() => {
const x: unknown[] = [1, 2, 3];
if (is.array<number>(x, is.number)) {
x[0].toFixed(0);
}
});
});
test('is.function', t => {
testType(t, 'function', ['generatorFunction', 'asyncGeneratorFunction', 'asyncFunction', 'boundFunction']);
});
test('is.boundFunction', t => {
t.false(is.boundFunction(function () {})); // eslint-disable-line prefer-arrow-callback
t.throws(() => {
assert.boundFunction(function () {}); // eslint-disable-line prefer-arrow-callback
});
});
test('is.buffer', t => {
testType(t, 'buffer');
});
test('is.object', t => {
const testData = types.get('object');
if (testData === undefined) {
t.fail('is.object not defined');
return;
}
for (const el of testData.fixtures) {
t.true(is.object(el));
t.notThrows(() => assert.object(el));
}
});
test('is.regExp', t => {
testType(t, 'regExp');
});
test('is.date', t => {
testType(t, 'date');
});
test('is.error', t => {
testType(t, 'error');
});
test('is.nativePromise', t => {
testType(t, 'nativePromise');
});
test('is.promise', t => {
testType(t, 'promise', ['nativePromise']);
});
test('is.asyncFunction', t => {
testType(t, 'asyncFunction', ['function']);
const fixture = async () => {};
if (is.asyncFunction(fixture)) {
// eslint-disable-next-line promise/prefer-await-to-then
t.true(is.function_(fixture().then));
t.notThrows(() => {
// eslint-disable-next-line promise/prefer-await-to-then
assert.function_(fixture().then);
});
}
});
test('is.generator', t => {
testType(t, 'generator');
});
test('is.asyncGenerator', t => {
testType(t, 'asyncGenerator');
const fixture = (async function * () {
yield 4;
})();
if (is.asyncGenerator(fixture)) {
t.true(is.function_(fixture.next));
}
});
test('is.generatorFunction', t => {
testType(t, 'generatorFunction', ['function']);
});
test('is.asyncGeneratorFunction', t => {
testType(t, 'asyncGeneratorFunction', ['function']);
const fixture = async function * () {
yield 4;
};
if (is.asyncGeneratorFunction(fixture)) {
t.true(is.function_(fixture().next));
}
});
test('is.map', t => {
testType(t, 'map', ['emptyMap']);
});
test('is.set', t => {
testType(t, 'set', ['emptySet']);
});
test('is.weakMap', t => {
testType(t, 'weakMap');
});
test('is.weakSet', t => {
testType(t, 'weakSet');
});
test('is.int8Array', t => {
testType(t, 'int8Array');
});
test('is.uint8Array', t => {
testType(t, 'uint8Array', ['buffer']);
});
test('is.uint8ClampedArray', t => {
testType(t, 'uint8ClampedArray');
});
test('is.int16Array', t => {
testType(t, 'int16Array');
});
test('is.uint16Array', t => {
testType(t, 'uint16Array');
});
test('is.int32Array', t => {
testType(t, 'int32Array');
});
test('is.uint32Array', t => {
testType(t, 'uint32Array');
});
test('is.float32Array', t => {
testType(t, 'float32Array');
});
test('is.float64Array', t => {
testType(t, 'float64Array');
});
test('is.bigInt64Array', t => {
testType(t, 'bigInt64Array');
});
test('is.bigUint64Array', t => {
testType(t, 'bigUint64Array');
});
test('is.arrayBuffer', t => {
testType(t, 'arrayBuffer');
});
test('is.dataView', t => {
testType(t, 'dataView');
});
test('is.directInstanceOf', t => {
const error = new Error();
const errorSubclass = new ErrorSubclassFixture();
t.true(is.directInstanceOf(error, Error));
t.true(is.directInstanceOf(errorSubclass, ErrorSubclassFixture));
t.notThrows(() => {
assert.directInstanceOf(error, Error);
});
t.notThrows(() => {
assert.directInstanceOf(errorSubclass, ErrorSubclassFixture);
});
t.false(is.directInstanceOf(error, ErrorSubclassFixture));
t.false(is.directInstanceOf(errorSubclass, Error));
t.throws(() => {
assert.directInstanceOf(error, ErrorSubclassFixture);
});
t.throws(() => {
assert.directInstanceOf(errorSubclass, Error);
});
});
test('is.urlInstance', t => {
const url = new URL('https://example.com');
t.true(is.urlInstance(url));
t.false(is.urlInstance({}));
t.false(is.urlInstance(undefined));
t.false(is.urlInstance(null));
t.notThrows(() => {
assert.urlInstance(url);
});
t.throws(() => {
assert.urlInstance({});
});
t.throws(() => {
assert.urlInstance(undefined);
});
t.throws(() => {
assert.urlInstance(null);
});
});
test('is.urlString', t => {
const url = 'https://example.com';
t.true(is.urlString(url));
t.false(is.urlString(new URL(url)));
t.false(is.urlString({}));
t.false(is.urlString(undefined));
t.false(is.urlString(null));
t.notThrows(() => {
assert.urlString(url);
});
t.throws(() => {
assert.urlString(new URL(url));
});
t.throws(() => {
assert.urlString({});
});
t.throws(() => {
assert.urlString(undefined);
});
t.throws(() => {
assert.urlString(null);
});
});
test('is.truthy', t => {
t.true(is.truthy('unicorn'));
t.true(is.truthy('🦄'));
t.true(is.truthy(new Set()));
t.true(is.truthy(Symbol('🦄')));
t.true(is.truthy(true));
t.true(is.truthy(1));
// Disabled until TS supports it for an ESnnnn target.
// t.true(is.truthy(1n));
t.true(is.truthy(BigInt(1)));
t.notThrows(() => {
assert.truthy('unicorn');
});
t.notThrows(() => {
assert.truthy('🦄');
});
t.notThrows(() => {
assert.truthy(new Set());
});
t.notThrows(() => {
assert.truthy(Symbol('🦄'));
});
t.notThrows(() => {
assert.truthy(true);
});
t.notThrows(() => {
assert.truthy(1);
});
// TODO: Disabled until TS supports it for an ESnnnn target.
// t.notThrows(() => assert.truthy(1n));
t.notThrows(() => {
assert.truthy(BigInt(1));
});
});
test('is.falsy', t => {
t.true(is.falsy(false));
t.true(is.falsy(0));
t.true(is.falsy(''));
t.true(is.falsy(null));
t.true(is.falsy(undefined));
t.true(is.falsy(NaN));
// TODO: Disabled until TS supports it for an ESnnnn target.
// t.true(is.falsy(0n));
t.true(is.falsy(BigInt(0)));
t.notThrows(() => {
assert.falsy(false);
});
t.notThrows(() => {
assert.falsy(0);
});
t.notThrows(() => {
assert.falsy('');
});
t.notThrows(() => {
assert.falsy(null);
});
t.notThrows(() => {
assert.falsy(undefined);
});
t.notThrows(() => {
assert.falsy(NaN);
});
// TODO: Disabled until TS supports it for an ESnnnn target.
// t.notThrows(() => assert.falsy(0n));
t.notThrows(() => {
assert.falsy(BigInt(0));
});
});
test('is.nan', t => {
testType(t, 'nan');
});
test('is.nullOrUndefined', t => {
testType(t, 'nullOrUndefined', ['undefined', 'null']);
});
test('is.primitive', t => {
const primitives: Primitive[] = [
undefined,
null,
'🦄',
6,
Infinity,
-Infinity,
true,
false,
Symbol('🦄')
// Disabled until TS supports it for an ESnnnn target.
// 6n
];
for (const element of primitives) {