fix(watch): properly remove cache after removing existing test files (#7399)

Author: soc221b

packages/vitest/src/node/project.ts

@@ -390,6 +390,13 @@ export class TestProject {
     this.testFilesList?.push(testPath)
   }
 
+  /** @internal */
+  _removeCachedTestFile(testPath: string): void {
+    if (this.testFilesList) {
+      this.testFilesList = this.testFilesList.filter(file => file !== testPath)
+    }
+  }
+
   /**
    * Returns if the file is a test file. Requires `.globTestFiles()` to be called first.
    * @internal

packages/vitest/src/node/watcher.ts

@@ -70,6 +70,7 @@ export class VitestWatcher {
     this.invalidates.add(id)
 
     if (this.vitest.state.filesMap.has(id)) {
+      this.vitest.projects.forEach(project => project._removeCachedTestFile(id))
       this.vitest.state.filesMap.delete(id)
       this.vitest.cache.results.removeFromCache(id)
       this.vitest.cache.stats.removeStats(id)

test/watch/test/file-watching.test.ts

@@ -1,4 +1,4 @@
-import { existsSync, readFileSync, rmSync, writeFileSync } from 'node:fs'
+import { existsSync, readFileSync, renameSync, rmSync, writeFileSync } from 'node:fs'
 import { afterEach, describe, expect, test } from 'vitest'
 
 import * as testUtils from '../../test-utils'
@@ -120,6 +120,42 @@ test("dynamic test case", () => {
   await vitest.waitForStdout('1 passed')
 })
 
+test('renaming an existing test file', async () => {
+  cleanups.push(() => rmSync('fixtures/after.test.ts'))
+  const beforeFile = 'fixtures/before.test.ts'
+  const afterFile = 'fixtures/after.test.ts'
+  const textContent = `
+import { expect, test } from "vitest";
+
+test("test case", () => {
+  console.log("Running existing test")
+  expect(true).toBeTruthy()
+})
+`
+  writeFileSync(beforeFile, textContent, 'utf-8')
+  const { vitest } = await testUtils.runVitest({ root: 'fixtures', watch: true })
+  await vitest.waitForStdout('Running existing test')
+
+  renameSync(beforeFile, afterFile)
+  await vitest.waitForStdout('Test removed')
+  await vitest.waitForStdout('Waiting for file changes...')
+
+  vitest.write('p')
+  await vitest.waitForStdout('Input filename pattern')
+  vitest.write('before')
+  await vitest.waitForStdout('Pattern matches no results')
+  vitest.write('\n')
+  await vitest.waitForStdout('No test files found')
+  await vitest.waitForStdout('Waiting for file changes...')
+  vitest.write('p')
+  await vitest.waitForStdout('Input filename pattern')
+  vitest.write('after')
+  await vitest.waitForStdout('Pattern matches 1 result')
+  vitest.write('\n')
+  await vitest.waitForStdout('Filename pattern: after')
+  await vitest.waitForStdout('1 passed')
+})
+
 test('editing source file generates new test report to file system', async () => {
   const report = 'fixtures/test-results/junit.xml'
   if (existsSync(report)) {