Improve tests (sindresorhus#255)

.github/workflows/main.yml

@@ -10,9 +10,9 @@ jobs:
       fail-fast: false
       matrix:
         node-version:
+          - 21
           - 20
           - 18
-          - 16
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-node@v4

package.json

@@ -64,28 +64,29 @@
 		"@rollup/plugin-json": "^6.1.0",
 		"@rollup/plugin-node-resolve": "^15.2.3",
 		"@types/minimist": "^1.2.5",
-		"ava": "^6.0.1",
-		"camelcase-keys": "^9.1.2",
+		"ava": "^6.1.1",
+		"camelcase-keys": "^9.1.3",
 		"common-tags": "^2.0.0-alpha.1",
 		"decamelize": "^6.0.0",
 		"decamelize-keys": "^2.0.1",
 		"delete_comments": "^0.0.2",
 		"execa": "^8.0.1",
-		"globby": "^14.0.0",
+		"globby": "^14.0.1",
 		"indent-string": "^5.0.0",
 		"minimist-options": "4.1.0",
 		"normalize-package-data": "^6.0.0",
 		"read-package-up": "^11.0.0",
 		"read-pkg": "^9.0.1",
 		"redent": "^4.0.0",
-		"rollup": "^4.9.2",
+		"rollup": "^4.12.0",
 		"rollup-plugin-dts": "^6.1.0",
 		"rollup-plugin-license": "^3.2.0",
+		"stack-utils": "^2.0.6",
 		"trim-newlines": "^5.0.0",
-		"tsd": "^0.30.3",
-		"type-fest": "^4.9.0",
-		"typescript": "^5.3.3",
-		"xo": "^0.56.0",
+		"tsd": "^0.30.7",
+		"type-fest": "^4.10.3",
+		"typescript": "~5.3.3",
+		"xo": "^0.57.0",
 		"yargs-parser": "^21.1.1"
 	},
 	"xo": {
@@ -96,10 +97,5 @@
 		"ignores": [
 			"build"
 		]
-	},
-	"ava": {
-		"files": [
-			"test/*"
-		]
 	}
 }

source/index.js

@@ -25,10 +25,7 @@ const buildResult = (options, parserOptions) => {
 
 	normalizePackageData(package_);
 
-	let {description} = options;
-	if (!description && description !== false) {
-		({description} = package_);
-	}
+	let description = options.description ?? package_.description;
 
 	description &&= help ? redent(`\n${description}\n`, options.helpIndent) : `\n${description}`;
 	help = `${description || ''}${help}\n`;

source/parser.js

@@ -23,7 +23,7 @@ const buildParserFlags = ({flags, booleanDefault}) => {
 
 		if (flag.isMultiple) {
 			flag.type = flag.type ? `${flag.type}-array` : 'array';
-			flag.default = flag.default ?? [];
+			flag.default ??= [];
 			delete flag.isMultiple;
 		}
 

test/_utils.js

@@ -1,24 +1,70 @@
-import path from 'node:path';
+/* eslint-disable ava/no-ignored-test-files */
 import {fileURLToPath} from 'node:url';
+import test from 'ava';
 import {execa} from 'execa';
+import {readPackage} from 'read-pkg';
 import {createTag, stripIndentTransformer, trimResultTransformer} from 'common-tags';
+import StackUtils from 'stack-utils';
 
-export const __dirname = path.dirname(fileURLToPath(import.meta.url));
+export const defaultFixture = 'fixture.js';
 
-const getFixture = fixture => path.join(__dirname, 'fixtures', fixture);
+const getFixture = fixture => fileURLToPath(new URL(`fixtures/${fixture}`, import.meta.url));
 
-export const spawnFixture = async (fixture = 'fixture.js', args = []) => {
-	// Allow calling with args first
+export const spawnFixture = async (fixture = defaultFixture, arguments_ = [], options = {}) => {
+	// Allow calling with arguments first
 	if (Array.isArray(fixture)) {
-		args = fixture;
-		fixture = 'fixture.js';
+		arguments_ = fixture;
+		fixture = defaultFixture;
 	}
 
-	return execa(getFixture(fixture), args);
+	return execa(getFixture(fixture), arguments_, options);
 };
 
+export {stripIndent} from 'common-tags';
+
 // Use old behavior prior to zspecza/common-tags#165
-export const stripIndent = createTag(
+export const stripIndentTrim = createTag(
 	stripIndentTransformer(),
 	trimResultTransformer(),
 );
+
+export const meowPackage = await readPackage();
+export const meowVersion = meowPackage.version;
+
+const stackUtils = new StackUtils();
+
+export const stackToErrorMessage = stack => stackUtils.clean(stack).split('\n').at(0);
+
+export const _verifyCli = (baseFixture = defaultFixture) => test.macro(
+	async (t, {fixture = baseFixture, args, execaOptions, expected, error}) => {
+		const assertions = await t.try(async tt => {
+			const arguments_ = args ? args.split(' ') : [];
+			const {all: output, exitCode} = await spawnFixture(fixture, arguments_, {reject: false, all: true, ...execaOptions});
+			tt.log('args:', arguments_);
+
+			if (error) {
+				tt.log(`error (code ${exitCode}):\n`, output);
+
+				if (typeof error === 'string') {
+					tt.is(output, error);
+					tt.is(exitCode, 2);
+				} else {
+					const error_ = error.clean ? stackToErrorMessage(output) : output;
+
+					tt.is(error_, error.message);
+					tt.is(exitCode, error.code);
+				}
+			} else {
+				tt.log('output:\n', output);
+
+				if (expected) {
+					tt.is(output, expected);
+				} else {
+					tt.pass();
+				}
+			}
+		});
+
+		assertions.commit({retainLogs: !assertions.passed});
+	},
+);

test/build.js

@@ -1,7 +1,8 @@
 import test from 'ava';
-import {readPackage} from 'read-pkg';
 import meow from '../build/index.js';
-import {spawnFixture} from './_utils.js';
+import {_verifyCli, meowVersion} from './_utils.js';
+
+const verifyCli = _verifyCli();
 
 test('main', t => {
 	const cli = meow(`
@@ -39,8 +40,7 @@ test('main', t => {
 	});
 });
 
-test('spawn cli and show version', async t => {
-	const pkg = await readPackage();
-	const {stdout} = await spawnFixture(['--version']);
-	t.is(stdout, pkg.version);
+test('spawn cli and show version', verifyCli, {
+	args: '--version',
+	expected: meowVersion,
 });