test: test case when --enable-source-maps is provided

Author: geeksilva97

Diff for: lib/internal/test_runner/test.js

@@ -14,7 +14,6 @@ const {
   Number,
   NumberPrototypeToFixed,
   ObjectDefineProperty,
-  ObjectKeys,
   ObjectSeal,
   Promise,
   PromisePrototypeThen,
@@ -561,7 +560,7 @@ class Test extends AsyncResource {
         const map = lazyFindSourceMap(this.loc.file);
         const entry = map?.findEntry(this.loc.line - 1, this.loc.column - 1);
 
-        if (entry !== undefined && ObjectKeys(entry).length > 0) {
+        if (entry?.originalSource !== undefined) {
           this.loc.line = entry.originalLine + 1;
           this.loc.column = entry.originalColumn + 1;
           this.loc.file = entry.originalSource;

Diff for: test/parallel/test-runner-coverage.js

@@ -321,6 +321,43 @@ test('coverage with source maps', skipIfNoInspector, () => {
   assert.strictEqual(result.status, 1);
 });
 
+
+test('coverage with --enable-source-maps option', skipIfNoInspector, () => {
+  const fixture = fixtures.path('test-runner', 'coverage', 'stdin.test.js');
+  const args = [
+    '--test', '--experimental-test-coverage', '--enable-source-maps', '--test-reporter', 'tap',
+    fixture,
+  ];
+
+  let report = [
+    '# start of coverage report',
+    '# ------------------------------------------------------------------',
+    '# file              | line % | branch % | funcs % | uncovered lines',
+    '# ------------------------------------------------------------------',
+    '# test              |        |          |         | ',
+    '#  fixtures         |        |          |         | ',
+    '#   test-runner     |        |          |         | ',
+    '#    coverage       |        |          |         | ',
+    '#     stdin.test.ts |  57.14 |   100.00 |  100.00 | 4-6',
+    '# ------------------------------------------------------------------',
+    '# all files         |  57.14 |   100.00 |  100.00 | ',
+    '# ------------------------------------------------------------------',
+    '# end of coverage report',
+  ].join('\n');
+
+  if (common.isWindows) {
+    report = report.replaceAll('/', '\\');
+  }
+
+  const result = spawnSync(process.execPath, args);
+  const stdOut = result.stdout.toString();
+
+  assert.strictEqual(result.stderr.toString(), '');
+  assert(!stdOut.includes('TypeError'));
+  assert(stdOut.includes(report));
+  assert.strictEqual(result.status, 0);
+});
+
 test('coverage with source maps missing sources', skipIfNoInspector, () => {
   const file = fixtures.path('test-runner', 'source-map-missing-sources', 'index.js');
   const missing = fixtures.path('test-runner', 'source-map-missing-sources', 'nonexistent.js');