test: add default coverage default exclusions test

test/fixtures/test-runner/coverage-default-exclusion/file-test.js

@@ -0,0 +1,7 @@
+const test = require('node:test');
+const assert = require('node:assert');
+const { foo } = require('./logic-file');
+
+test('foo returns 1', () => {
+    assert.strictEqual(foo(), 1);
+});

test/fixtures/test-runner/coverage-default-exclusion/file.test.mjs

@@ -0,0 +1,7 @@
+import test from 'node:test';
+import assert from 'node:assert';
+import { foo } from './logic-file.js';
+
+test('foo returns 1', () => {
+    assert.strictEqual(foo(), 1);
+});

test/fixtures/test-runner/coverage-default-exclusion/file.test.ts

@@ -0,0 +1,7 @@
+import test from 'node:test';
+import assert from 'node:assert';
+import { foo } from './logic-file.js';
+
+test('foo returns 1', () => {
+    assert.strictEqual(foo(), 1);
+});

test/fixtures/test-runner/coverage-default-exclusion/logic-file.js

@@ -0,0 +1,9 @@
+function foo() {
+    return 1;
+}
+
+function bar() {
+    return 'bar';
+}
+
+module.exports = { foo, bar };

test/fixtures/test-runner/coverage-default-exclusion/test.cjs

@@ -0,0 +1,7 @@
+const test = require('node:test');
+const assert = require('node:assert');
+const { foo } = require('./logic-file.js');
+
+test('foo returns 1', () => {
+    assert.strictEqual(foo(), 1);
+});

test/fixtures/test-runner/coverage-default-exclusion/test/not-matching-test-name.js

@@ -0,0 +1,7 @@
+const test = require('node:test');
+const assert = require('node:assert');
+const { foo } = require('../logic-file.js');
+
+test('foo returns 1', () => {
+    assert.strictEqual(foo(), 1);
+});

test/parallel/test-runner-coverage-default-exclusion.mjs

@@ -0,0 +1,113 @@
+import '../common/index.mjs';
+import { before, describe, it } from 'node:test';
+import assert from 'node:assert';
+import { spawnSync } from 'node:child_process';
+import { cp } from 'node:fs/promises';
+import tmpdir from '../common/tmpdir.js';
+import fixtures from '../common/fixtures.js';
+
+tmpdir.refresh();
+
+async function setupFixtures() {
+  const fixtureDir = fixtures.path('test-runner', 'coverage-default-exclusion');
+  await cp(fixtureDir, tmpdir.path, { recursive: true });
+}
+
+describe('test runner coverage default exclusion', () => {
+  before(async () => {
+    await setupFixtures();
+  });
+
+  it('should override default exclusion setting --test-coverage-exclude', async () => {
+    const report = [
+      '# start of coverage report',
+      '# ---------------------------------------------------------------------------',
+      '# file                       | line % | branch % | funcs % | uncovered lines',
+      '# ---------------------------------------------------------------------------',
+      '# file-test.js               | 100.00 |   100.00 |  100.00 | ',
+      '# file.test.mjs              | 100.00 |   100.00 |  100.00 | ',
+      '# logic-file.js              |  66.67 |   100.00 |   50.00 | 5-7',
+      '# test.cjs                   | 100.00 |   100.00 |  100.00 | ',
+      '# test                       |        |          |         | ',
+      '#  not-matching-test-name.js | 100.00 |   100.00 |  100.00 | ',
+      '# ---------------------------------------------------------------------------',
+      '# all files                  |  91.89 |   100.00 |   83.33 | ',
+      '# ---------------------------------------------------------------------------',
+      '# end of coverage report',
+    ].join('\n');
+
+
+    const args = [
+      '--test',
+      '--experimental-test-coverage',
+      '--test-coverage-exclude=!test/**',
+      '--test-reporter=tap',
+    ];
+    const result = spawnSync(process.execPath, args, {
+      env: { ...process.env, NODE_TEST_TMPDIR: tmpdir.path },
+      cwd: tmpdir.path
+    });
+
+    assert.strictEqual(result.stderr.toString(), '');
+    assert(result.stdout.toString().includes(report));
+    assert.strictEqual(result.status, 0);
+  });
+
+  it('should exclude test files from coverage by default', async () => {
+    const report = [
+      '# start of coverage report',
+      '# --------------------------------------------------------------',
+      '# file          | line % | branch % | funcs % | uncovered lines',
+      '# --------------------------------------------------------------',
+      '# logic-file.js |  66.67 |   100.00 |   50.00 | 5-7',
+      '# --------------------------------------------------------------',
+      '# all files     |  66.67 |   100.00 |   50.00 | ',
+      '# --------------------------------------------------------------',
+      '# end of coverage report',
+    ].join('\n');
+
+    const args = [
+      '--test',
+      '--experimental-test-coverage',
+      '--test-reporter=tap',
+    ];
+    const result = spawnSync(process.execPath, args, {
+      env: { ...process.env, NODE_TEST_TMPDIR: tmpdir.path },
+      cwd: tmpdir.path
+    });
+
+    assert.strictEqual(result.stderr.toString(), '');
+    assert(result.stdout.toString().includes(report));
+    assert.strictEqual(result.status, 0);
+  });
+
+  it('should exclude ts test files when using --experimental-strip-types', async () => {
+    const report = [
+      '# start of coverage report',
+      '# --------------------------------------------------------------',
+      '# file          | line % | branch % | funcs % | uncovered lines',
+      '# --------------------------------------------------------------',
+      '# logic-file.js |  66.67 |   100.00 |   50.00 | 5-7',
+      '# --------------------------------------------------------------',
+      '# all files     |  66.67 |   100.00 |   50.00 | ',
+      '# --------------------------------------------------------------',
+      '# end of coverage report',
+    ].join('\n');
+
+    const args = [
+      '--test',
+      '--experimental-test-coverage',
+      '--experimental-strip-types',
+      '--disable-warning=ExperimentalWarning',
+      '--test-reporter=tap',
+    ];
+    const result = spawnSync(process.execPath, args, {
+      env: { ...process.env, NODE_TEST_TMPDIR: tmpdir.path },
+      cwd: tmpdir.path
+    });
+
+    assert.strictEqual(result.stderr.toString(), '');
+    assert(result.stdout.toString().includes(report));
+    assert.strictEqual(result.status, 0);
+  });
+});