test: coverage report with --enable-source-maps

Author: geeksilva97

test/parallel/test-runner-coverage-source-map.js

@@ -45,6 +45,31 @@ describe('Coverage with source maps', async () => {
     t.assert.strictEqual(spawned.code, 1);
   });
 
+  await it.only('accounts only mapped lines when --enable-source-maps is provided', async (t) => {
+    const report = generateReport([
+      '# --------------------------------------------------------------',
+      '# file          | line % | branch % | funcs % | uncovered lines',
+      '# --------------------------------------------------------------',
+      '# a.test.ts     | 100.00 |   100.00 |  100.00 | ', // part of a bundle
+      '# b.test.ts     |  88.89 |   100.00 |  100.00 | 1', // part of a bundle
+      '# index.test.js |  71.43 |    66.67 |  100.00 | 6-7', // no source map
+      '# stdin.test.ts |  85.71 |   100.00 |    0.00 | 2', // Source map without original file
+      '# --------------------------------------------------------------',
+      '# all files     |  88.89 |    85.71 |   66.67 | ',
+      '# --------------------------------------------------------------',
+    ]);
+
+    const spawned = await common.spawnPromisified(process.execPath, [
+      '--test', '--experimental-test-coverage', '--enable-source-maps', '--test-reporter', 'tap',
+    ], {
+      cwd: fixtures.path('test-runner', 'coverage')
+    });
+
+    t.assert.strictEqual(spawned.stderr, '');
+    t.assert.ok(spawned.stdout.includes(report));
+    t.assert.strictEqual(spawned.code, 1);
+  });
+
   await it('properly accounts for line endings in source maps', async (t) => {
     const report = generateReport([
       '# ------------------------------------------------------------------',