fixup added tests

test/parallel/test-runner-watch-mode.mjs

@@ -3,7 +3,7 @@ import * as common from '../common/index.mjs';
 import { describe, it } from 'node:test';
 import assert from 'node:assert';
 import { spawn } from 'node:child_process';
-import { writeFileSync } from 'node:fs';
+import { writeFileSync, renameSync, unlinkSync, existsSync } from 'node:fs';
 import util from 'internal/util';
 import tmpdir from '../common/tmpdir.js';
 
@@ -30,7 +30,7 @@ const fixturePaths = Object.keys(fixtureContent)
 Object.entries(fixtureContent)
   .forEach(([file, content]) => writeFileSync(fixturePaths[file], content));
 
-async function testWatch({ fileToUpdate, file }) {
+async function testWatch({ fileToUpdate, file, action = 'update' }) {
   const ran1 = util.createDeferredPromise();
   const ran2 = util.createDeferredPromise();
   const child = spawn(process.execPath,
@@ -48,6 +48,7 @@ async function testWatch({ fileToUpdate, file }) {
     if (testRuns?.length >= 2) ran2.resolve();
   });
 
+  if (action === 'update') {
   await ran1.promise;
   runs.push(currentRun);
   currentRun = '';
@@ -58,11 +59,51 @@ async function testWatch({ fileToUpdate, file }) {
   runs.push(currentRun);
   clearInterval(interval);
   child.kill();
+    for (const run of runs) {
+      assert.match(run, /# tests 1/);
+      assert.match(run, /# pass 1/);
+      assert.match(run, /# fail 0/);
+      assert.match(run, /# cancelled 0/);
+    }
+  } else if (action === 'rename') {
+    await ran1.promise;
+    runs.push(currentRun);
+    currentRun = '';
+    const fileToRenamePath = tmpdir.resolve(fileToUpdate);
+    const newFileNamePath = tmpdir.resolve(`test-renamed-${fileToUpdate}`);
+    const interval = setInterval(() => renameSync(fileToRenamePath, newFileNamePath), common.platformTimeout(1000));
+    await ran2.promise;
+    runs.push(currentRun);
+    clearInterval(interval);
+    child.kill();
+
   for (const run of runs) {
     assert.match(run, /# tests 1/);
     assert.match(run, /# pass 1/);
     assert.match(run, /# fail 0/);
     assert.match(run, /# cancelled 0/);
+    }
+  } else if (action === 'delete') {
+    await ran1.promise;
+    runs.push(currentRun);
+    currentRun = '';
+    const fileToDeletePath = tmpdir.resolve(fileToUpdate);
+    const interval = setInterval(() => {
+      if(existsSync(fileToDeletePath)) {
+        unlinkSync(fileToDeletePath)
+      } else {
+        ran2.resolve();
+      }
+    }, common.platformTimeout(1000));
+    await ran2.promise;
+
+    runs.push(currentRun);
+    clearInterval(interval);
+    child.kill();
+
+    for (const run of runs) {
+      assert.doesNotMatch(run, /MODULE_NOT_FOUND/)
+    }
   }
 }
 
@@ -82,4 +123,12 @@ describe('test runner watch mode', () => {
   it('should support running tests without a file', async () => {
     await testWatch({ fileToUpdate: 'test.js' });
   });
+
+  it('should support a watched test file rename', async () => {
+    await testWatch({ fileToUpdate: 'test.js', action: 'rename' });
+  });
+
+  it('should not throw when delete a watched test file', async () => {
+    await testWatch({ fileToUpdate: 'test.js', action: 'delete' });
+  });
 });