test: add test for coverage control comments

test/fixtures/test-runner/coverage/coverage-control-comments.js

@@ -0,0 +1,25 @@
+'use strict';
+const { test } = require('node:test');
+
+function coveredFunction() { 
+    return 'This function is covered in coverage';
+}
+
+/* node:coverage ignore next 7 */
+function ignoredFunctionDefinitionWithCount() {
+    const ignoredVar = true;
+    if (ignoredVar) {
+        return 'This line is ignored';
+    }
+    return 'This should not be returned';
+}
+
+/* node:coverage disable */
+function disabledFunction() {
+    return 'This function is entirely disabled in coverage';
+}
+/* node:coverage enable */
+
+test('coverage control comments fixture', () => {
+    coveredFunction();
+});

test/parallel/test-runner-coverage.js

@@ -550,3 +550,41 @@ test('correctly prints the coverage report of files contained in parent director
   assert(result.stdout.toString().includes(report));
   assert.strictEqual(result.status, 0);
 });
+
+test('should respect /* node:coverage */ comments', skipIfNoInspector, () => {
+  const report = [
+    '# start of coverage report',
+    '# ---------------------------------------------------------------------------------',
+    '# file                             | line % | branch % | funcs % | uncovered lines',
+    '# ---------------------------------------------------------------------------------',
+    '# test                             |        |          |         | ',
+    '#  fixtures                        |        |          |         | ',
+    '#   test-runner                    |        |          |         | ',
+    '#    coverage                      |        |          |         | ',
+    '#     coverage-control-comments.js | 100.00 |   100.00 |  100.00 | ',
+    '# ---------------------------------------------------------------------------------',
+    '# all files                        | 100.00 |   100.00 |  100.00 | ',
+    '# ---------------------------------------------------------------------------------',
+    '# end of coverage report',
+  ].join('\n');
+
+  if (common.isWindows) {
+    return report.replaceAll('/', '\\');
+  }
+
+  const fixture = fixtures.path('test-runner', 'coverage', 'coverage-control-comments.js');
+  const args = [
+    '--test',
+    '--experimental-test-coverage',
+    '--test-coverage-exclude=!test/**',
+    '--test-reporter',
+    'tap',
+    fixture,
+  ];
+
+  const result = spawnSync(process.execPath, args);
+
+  assert.strictEqual(result.stderr.toString(), '');
+  assert(result.stdout.toString().includes(report));
+  assert.strictEqual(result.status, 0);
+});