Test Coverage view not visible after running with coverage

[aniketicloud]

Describe the bug

When I run the tests with code coverage, the tests run and passes. Only once I saw the Test Coverage view tab. At this time, I could see the uncovered lines when I open the file and all that is explained in https://code.visualstudio.com/docs/editor/testing#_test-coverage. Now, after restart, I cannot see the code coverage of files with help of extension. Once, tests run with code coverage, but show incorrect results.

Attaching the repository:
https://github.com/aniketicloud/playwright-react-18-vite-ts/tree/feature/FM-65-poc-mui-vitest-code-coverage

Reproduction

• Install React, Vite, React testing library, Vitest and vitest extension in VS Code
• run tests with vitest vs code extension.

Output

Show the Test Coverage view.

Version

1.6.1

Validations

• Check that you are using the latest version of the extension
• Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.
• Check that this is a concrete bug. For Q&A open a GitHub Discussion or join our Discord Chat Server.
• The provided reproduction is a minimal reproducible example of the bug.

[Xain3]

I am having a similar issue, where the Test Coverage tab only shows sporarically (I could not find any specific pattern of when it works and when it does not). If I run the coverage tests in the console, they work perfectly.

Here's the output:

[INFO 1:53:11 PM] [Worker] Running coverage with configuration: {
  provider: 'istanbul',
  enabled: true,
  all: true,
  clean: true,
  cleanOnRerun: false,
  reportsDirectory: '/tmp/vitest-coverage-bed41c49-b5c0-4032-9ba4-2383af355ba4',
  exclude: [
    'node_modules/',
    'coverage/**',
    '.tmp/**',
    '**/*.{test,spec}.?(c|m)[jt]s?(x)'
  ],
  reportOnFailure: true,
  reporter: [ [ 'json', [Object] ] ],
  extension: [
    '.js',     '.cjs',
    '.mjs',    '.ts',
    '.mts',    '.tsx',
    '.jsx',    '.vue',
    '.svelte', '.marko',
    '.astro'
  ],
  allowExternal: false,
  excludeAfterRemap: false,
  ignoreEmptyLines: true,
  processingConcurrency: 8,
  watermarks: {
    statements: [ 50, 80 ],
    functions: [ 50, 80 ],
    branches: [ 50, 80 ],
    lines: [ 50, 80 ]
  },
  thresholds: undefined
}
[INFO 1:53:12 PM] Running 1 file(s): tests
[1:53:12 PM] Starting a test run because tests/hello_test/hello.test.mjs tests/config/loaders/config-loader.test.mjs tests/.dev/scripts/ci/bump-version.test.mjs triggered a watch rerun event
[1:53:12 PM] Enqueuing "should return "Hello, World!""
[1:53:12 PM] Enqueuing "should throw an error when expecting a different string"
[1:53:12 PM] Enqueuing "should execute a shell command successfully"
[1:53:12 PM] Enqueuing "should throw an error for a failing shell command"
[1:53:12 PM] Enqueuing "should load environment variables from existing .env file"
[1:53:12 PM] Enqueuing "should handle quoted values in .env file"
[1:53:12 PM] Enqueuing "should skip comments and empty lines"
[1:53:12 PM] Enqueuing "should skip lines without equals sign"
[1:53:12 PM] Enqueuing "should use defaults when .env file does not exist"
[1:53:12 PM] Enqueuing "should not override existing environment variables"
[1:53:12 PM] Enqueuing "should handle custom env file path"
[1:53:12 PM] Enqueuing "should handle empty .env file"
[1:53:12 PM] Enqueuing "should handle malformed lines gracefully"
[1:53:12 PM] Enqueuing "should pass validation with all required variables present and valid"
[1:53:12 PM] Enqueuing "should fail validation when required variables are missing"
[1:53:12 PM] Enqueuing "should fail validation when APP_ENV is invalid"
[1:53:12 PM] Enqueuing "should fail validation when LOG_LEVEL is invalid"
[1:53:12 PM] Enqueuing "should handle multiple missing required variables"
[1:53:12 PM] Enqueuing "should export environment variables as JSON"
[1:53:12 PM] Enqueuing "should handle empty environment"
[1:53:12 PM] Enqueuing "should display current configuration"
[1:53:12 PM] Enqueuing "should handle empty configuration"
[1:53:12 PM] Enqueuing "should run showConfig by default"
[1:53:12 PM] Enqueuing "should run validateConfig when --validate flag is present"
[1:53:12 PM] Enqueuing "should run exportJson when --export-json flag is present"
[1:53:12 PM] Enqueuing "should handle custom env file argument"
[1:53:12 PM] Enqueuing "loadConfig and getCurrentVersion succeed with valid files"
[1:53:12 PM] Enqueuing "updateFileVersion updates package.json version (json fallback)"
[1:53:12 PM] Enqueuing "updateFileVersion in dry-run mode does not modify files"
[1:53:12 PM] Enqueuing "updateFileVersion uses custom process script when configured"
[1:53:12 PM] Enqueuing "updateFileVersion throws when target file does not exist"
[1:53:12 PM] Enqueuing "running the script as a child process performs a patch bump and exits 0"
[1:53:12 PM] Enqueuing "running the script with invalid bump type exits non-zero and reports error"
[1:53:12 PM] Enqueuing "should return "Hello, World!""
[1:53:12 PM] Enqueuing "should throw an error when expecting a different string"
[1:53:12 PM] Enqueuing "should execute a shell command successfully"
[1:53:12 PM] Enqueuing "should throw an error for a failing shell command"
[1:53:12 PM] Enqueuing "should load environment variables from existing .env file"
[1:53:12 PM] Enqueuing "should handle quoted values in .env file"
[1:53:12 PM] Enqueuing "should skip comments and empty lines"
[1:53:12 PM] Enqueuing "should skip lines without equals sign"
[1:53:12 PM] Enqueuing "should use defaults when .env file does not exist"
[1:53:12 PM] Enqueuing "should not override existing environment variables"
[1:53:12 PM] Enqueuing "should handle custom env file path"
[1:53:12 PM] Enqueuing "should handle empty .env file"
[1:53:12 PM] Enqueuing "should handle malformed lines gracefully"
[1:53:12 PM] Enqueuing "should pass validation with all required variables present and valid"
[1:53:12 PM] Enqueuing "should fail validation when required variables are missing"
[1:53:12 PM] Enqueuing "should fail validation when APP_ENV is invalid"
[1:53:12 PM] Enqueuing "should fail validation when LOG_LEVEL is invalid"
[1:53:12 PM] Enqueuing "should handle multiple missing required variables"
[1:53:12 PM] Enqueuing "should export environment variables as JSON"
[1:53:12 PM] Enqueuing "should handle empty environment"
[1:53:12 PM] Enqueuing "should display current configuration"
[1:53:12 PM] Enqueuing "should handle empty configuration"
[1:53:12 PM] Enqueuing "should run showConfig by default"
[1:53:12 PM] Enqueuing "should run validateConfig when --validate flag is present"
[1:53:12 PM] Enqueuing "should run exportJson when --export-json flag is present"
[1:53:12 PM] Enqueuing "should handle custom env file argument"
[1:53:12 PM] Enqueuing "loadConfig and getCurrentVersion succeed with valid files"
[1:53:12 PM] Enqueuing "updateFileVersion updates package.json version (json fallback)"
[1:53:12 PM] Enqueuing "updateFileVersion in dry-run mode does not modify files"
[1:53:12 PM] Enqueuing "updateFileVersion uses custom process script when configured"
[1:53:12 PM] Enqueuing "updateFileVersion throws when target file does not exist"
[1:53:12 PM] Enqueuing "running the script as a child process performs a patch bump and exits 0"
[1:53:12 PM] Enqueuing "running the script with invalid bump type exits non-zero and reports error"
[1:53:12 PM] Enqueuing "should return "Hello, World!""
[1:53:12 PM] Enqueuing "should throw an error when expecting a different string"
[1:53:12 PM] Enqueuing "should execute a shell command successfully"
[1:53:12 PM] Enqueuing "should throw an error for a failing shell command"
[1:53:12 PM] Enqueuing "should load environment variables from existing .env file"
[1:53:12 PM] Enqueuing "should handle quoted values in .env file"
[1:53:12 PM] Enqueuing "should skip comments and empty lines"
[1:53:12 PM] Enqueuing "should skip lines without equals sign"
[1:53:12 PM] Enqueuing "should use defaults when .env file does not exist"
[1:53:12 PM] Enqueuing "should not override existing environment variables"
[1:53:12 PM] Enqueuing "should handle custom env file path"
[1:53:12 PM] Enqueuing "should handle empty .env file"
[1:53:12 PM] Enqueuing "should handle malformed lines gracefully"
[1:53:12 PM] Enqueuing "should pass validation with all required variables present and valid"
[1:53:12 PM] Enqueuing "should fail validation when required variables are missing"
[1:53:12 PM] Enqueuing "should fail validation when APP_ENV is invalid"
[1:53:12 PM] Enqueuing "should fail validation when LOG_LEVEL is invalid"
[1:53:12 PM] Enqueuing "should handle multiple missing required variables"
[1:53:12 PM] Enqueuing "should export environment variables as JSON"
[1:53:12 PM] Enqueuing "should handle empty environment"
[1:53:12 PM] Enqueuing "should display current configuration"
[1:53:12 PM] Enqueuing "should handle empty configuration"
[1:53:12 PM] Enqueuing "should run showConfig by default"
[1:53:12 PM] Enqueuing "should run validateConfig when --validate flag is present"
[1:53:12 PM] Enqueuing "should run exportJson when --export-json flag is present"
[1:53:12 PM] Enqueuing "should handle custom env file argument"
[1:53:12 PM] Enqueuing "loadConfig and getCurrentVersion succeed with valid files"
[1:53:12 PM] Enqueuing "updateFileVersion updates package.json version (json fallback)"
[1:53:12 PM] Enqueuing "updateFileVersion in dry-run mode does not modify files"
[1:53:12 PM] Enqueuing "updateFileVersion uses custom process script when configured"
[1:53:12 PM] Enqueuing "updateFileVersion throws when target file does not exist"
[1:53:12 PM] Enqueuing "running the script as a child process performs a patch bump and exits 0"
[1:53:12 PM] Enqueuing "running the script with invalid bump type exits non-zero and reports error"
[1:53:12 PM] No task result for "hello.test.mjs", ignoring
[1:53:12 PM] No task result for "hello world", ignoring
[1:53:12 PM] Enqueuing "should return "Hello, World!"" because it was just collected
[1:53:12 PM] Enqueuing "should throw an error when expecting a different string" because it was just collected
[1:53:12 PM] No task result for "shell command", ignoring
[1:53:12 PM] Enqueuing "should execute a shell command successfully" because it was just collected
[1:53:12 PM] Enqueuing "should throw an error for a failing shell command" because it was just collected
[1:53:12 PM] No errors found for "hello.test.mjs"
[1:53:12 PM] No task result for "bump-version.test.mjs", ignoring
[1:53:12 PM] No task result for "bump-version script unit tests (sandboxed)", ignoring
[1:53:12 PM] Enqueuing "loadConfig and getCurrentVersion succeed with valid files" because it was just collected
[1:53:12 PM] Enqueuing "updateFileVersion updates package.json version (json fallback)" because it was just collected
[1:53:12 PM] Enqueuing "updateFileVersion in dry-run mode does not modify files" because it was just collected
[1:53:12 PM] Enqueuing "updateFileVersion uses custom process script when configured" because it was just collected
[1:53:12 PM] Enqueuing "updateFileVersion throws when target file does not exist" because it was just collected
[1:53:12 PM] Enqueuing "running the script as a child process performs a patch bump and exits 0" because it was just collected
[1:53:12 PM] Enqueuing "running the script with invalid bump type exits non-zero and reports error" because it was just collected
[1:53:12 PM] No errors found for "bump-version.test.mjs"
[1:53:12 PM] No errors found for "hello world"
[1:53:12 PM] Marking "should return "Hello, World!"" as passed
[1:53:12 PM] Marking "should throw an error when expecting a different string" as passed
[1:53:12 PM] No errors found for "shell command"
[1:53:12 PM] Marking "should execute a shell command successfully" as passed
[1:53:12 PM] Marking "should throw an error for a failing shell command" as passed
[1:53:12 PM] No errors found for "hello.test.mjs"
[1:53:12 PM] No task result for "config-loader.test.mjs", ignoring
[1:53:12 PM] No task result for "Config Loader", ignoring
[1:53:12 PM] No task result for "loadConfig", ignoring
[1:53:12 PM] Enqueuing "should load environment variables from existing .env file" because it was just collected
[1:53:12 PM] Enqueuing "should handle quoted values in .env file" because it was just collected
[1:53:12 PM] Enqueuing "should skip comments and empty lines" because it was just collected
[1:53:12 PM] Enqueuing "should skip lines without equals sign" because it was just collected
[1:53:12 PM] Enqueuing "should use defaults when .env file does not exist" because it was just collected
[1:53:12 PM] Enqueuing "should not override existing environment variables" because it was just collected
[1:53:12 PM] Enqueuing "should handle custom env file path" because it was just collected
[1:53:12 PM] Enqueuing "should handle empty .env file" because it was just collected
[1:53:12 PM] Enqueuing "should handle malformed lines gracefully" because it was just collected
[1:53:12 PM] No task result for "validateConfig", ignoring
[1:53:12 PM] Enqueuing "should pass validation with all required variables present and valid" because it was just collected
[1:53:12 PM] Enqueuing "should fail validation when required variables are missing" because it was just collected
[1:53:12 PM] Enqueuing "should fail validation when APP_ENV is invalid" because it was just collected
[1:53:12 PM] Enqueuing "should fail validation when LOG_LEVEL is invalid" because it was just collected
[1:53:12 PM] Enqueuing "should handle multiple missing required variables" because it was just collected
[1:53:12 PM] No task result for "exportJson", ignoring
[1:53:12 PM] Enqueuing "should export environment variables as JSON" because it was just collected
[1:53:12 PM] Enqueuing "should handle empty environment" because it was just collected
[1:53:12 PM] No task result for "showConfig", ignoring
[1:53:12 PM] Enqueuing "should display current configuration" because it was just collected
[1:53:12 PM] Enqueuing "should handle empty configuration" because it was just collected
[1:53:12 PM] No task result for "Script execution", ignoring
[1:53:12 PM] Enqueuing "should run showConfig by default" because it was just collected
[1:53:12 PM] Enqueuing "should run validateConfig when --validate flag is present" because it was just collected
[1:53:12 PM] Enqueuing "should run exportJson when --export-json flag is present" because it was just collected
[1:53:12 PM] Enqueuing "should handle custom env file argument" because it was just collected
[1:53:12 PM] No errors found for "config-loader.test.mjs"
[1:53:12 PM] No errors found for "Config Loader"
[1:53:12 PM] No errors found for "loadConfig"
[1:53:12 PM] Marking "should load environment variables from existing .env file" as passed
[1:53:12 PM] Marking "should handle quoted values in .env file" as passed
[1:53:12 PM] Marking "should skip comments and empty lines" as passed
[1:53:12 PM] Marking "should skip lines without equals sign" as passed
[1:53:12 PM] Marking "should use defaults when .env file does not exist" as passed
[1:53:12 PM] Marking "should not override existing environment variables" as passed
[1:53:12 PM] Marking "should handle custom env file path" as passed
[1:53:12 PM] Marking "should handle empty .env file" as passed
[1:53:12 PM] Marking "should handle malformed lines gracefully" as passed
[1:53:12 PM] No errors found for "validateConfig"
[1:53:12 PM] Marking "should pass validation with all required variables present and valid" as passed
[1:53:12 PM] Marking "should fail validation when required variables are missing" as passed
[1:53:12 PM] Marking "should fail validation when APP_ENV is invalid" as passed
[1:53:12 PM] Marking "should fail validation when LOG_LEVEL is invalid" as passed
[1:53:12 PM] Marking "should handle multiple missing required variables" as passed
[1:53:12 PM] No errors found for "exportJson"
[1:53:12 PM] Marking "should export environment variables as JSON" as passed
[1:53:12 PM] Marking "should handle empty environment" as passed
[1:53:12 PM] No errors found for "showConfig"
[1:53:12 PM] Marking "should display current configuration" as passed
[1:53:12 PM] Marking "should handle empty configuration" as passed
[1:53:12 PM] No errors found for "Script execution"
[1:53:12 PM] Marking "should run showConfig by default" as passed
[1:53:12 PM] Marking "should run validateConfig when --validate flag is present" as passed
[1:53:12 PM] Marking "should run exportJson when --export-json flag is present" as passed
[1:53:12 PM] Marking "should handle custom env file argument" as passed
[1:53:12 PM] No errors found for "config-loader.test.mjs"
[1:53:12 PM] No errors found for "bump-version script unit tests (sandboxed)"
[1:53:12 PM] Marking "loadConfig and getCurrentVersion succeed with valid files" as passed
[1:53:12 PM] [VSCODE] Error checking file stats: .tmp/bump-version-32r8dF EntryNotFound (FileSystemError): Error: ENOENT: no such file or directory, stat '/workspaces/new-project-template/.tmp/bump-version-32r8dF'
[1:53:12 PM] [VSCODE] Error checking file stats: .tmp/bump-version-32r8dF/node_modules EntryNotFound (FileSystemError): Error: ENOENT: no such file or directory, stat '/workspaces/new-project-template/.tmp/bump-version-32r8dF/node_modules'
[1:53:12 PM] [VSCODE] Error checking file stats: .tmp/bump-version-32r8dF/.dev EntryNotFound (FileSystemError): Error: ENOENT: no such file or directory, stat '/workspaces/new-project-template/.tmp/bump-version-32r8dF/.dev'
[1:53:12 PM] [VSCODE] Error checking file stats: .tmp/bump-version-32r8dF/.dev/config/bump-version.yaml EntryNotFound (FileSystemError): Error: ENOENT: no such file or directory, stat '/workspaces/new-project-template/.tmp/bump-version-32r8dF/.dev/config/bump-version.yaml'
[1:53:12 PM] [VSCODE] Error checking file stats: .tmp/bump-version-32r8dF/VERSION EntryNotFound (FileSystemError): Error: ENOENT: no such file or directory, stat '/workspaces/new-project-template/.tmp/bump-version-32r8dF/VERSION'
[1:53:12 PM] [VSCODE] Error checking file stats: .tmp/bump-version-32r8dF/.dev/config EntryNotFound (FileSystemError): Error: ENOENT: no such file or directory, stat '/workspaces/new-project-template/.tmp/bump-version-32r8dF/.dev/config'
[1:53:12 PM] Marking "loadConfig and getCurrentVersion succeed with valid files" as passed
[1:53:12 PM] Marking "updateFileVersion updates package.json version (json fallback)" as passed
[1:53:12 PM] Marking "updateFileVersion in dry-run mode does not modify files" as passed
[1:53:12 PM] Marking "updateFileVersion uses custom process script when configured" as passed
[1:53:12 PM] Marking "updateFileVersion uses custom process script when configured" as passed
[1:53:12 PM] Marking "updateFileVersion throws when target file does not exist" as passed
[1:53:12 PM] Marking "running the script as a child process performs a patch bump and exits 0" as passed
[1:53:12 PM] [VSCODE] File deleted: .tmp/bump-version-32r8dF
[1:53:12 PM] [VSCODE] File deleted: .tmp/bump-version-98c9xF/.dev
[1:53:12 PM] [VSCODE] File deleted: .tmp/bump-version-D3HImG/.dev
[1:53:12 PM] [VSCODE] File deleted: .tmp/bump-version-culbYH/.dev
[1:53:12 PM] [VSCODE] File deleted: .tmp/bump-version-dXdsZG/.dev
[1:53:12 PM] [VSCODE] File deleted: .tmp/bump-version-dXdsZG/VERSION
[1:53:12 PM] [VSCODE] File deleted: .tmp/bump-version-98c9xF/node_modules
[1:53:12 PM] [VSCODE] File deleted: .tmp/bump-version-D3HImG/node_modules
[1:53:12 PM] [VSCODE] File deleted: .tmp/bump-version-culbYH/node_modules
[1:53:12 PM] [VSCODE] File deleted: .tmp/bump-version-dXdsZG/node_modules
[1:53:12 PM] [VSCODE] Error checking file stats: .tmp/bump-version-JjzLBI EntryNotFound (FileSystemError): Error: ENOENT: no such file or directory, stat '/workspaces/new-project-template/.tmp/bump-version-JjzLBI'
[1:53:12 PM] [VSCODE] Error checking file stats: .tmp/bump-version-JjzLBI/package.json EntryNotFound (FileSystemError): Error: ENOENT: no such file or directory, stat '/workspaces/new-project-template/.tmp/bump-version-JjzLBI/package.json'
[1:53:12 PM] [VSCODE] Error checking file stats: .tmp/bump-version-JjzLBI/VERSION EntryNotFound (FileSystemError): Error: ENOENT: no such file or directory, stat '/workspaces/new-project-template/.tmp/bump-version-JjzLBI/VERSION'
[1:53:12 PM] Marking "running the script as a child process performs a patch bump and exits 0" as passed
[1:53:12 PM] Marking "running the script with invalid bump type exits non-zero and reports error" as passed
[1:53:12 PM] Marking "running the script with invalid bump type exits non-zero and reports error" as passed
[1:53:12 PM] No errors found for "bump-version script unit tests (sandboxed)"
[1:53:12 PM] No errors found for "bump-version.test.mjs"
[1:53:12 PM] [VSCODE] File deleted: .tmp/bump-version-JjzLBI
[1:53:12 PM] [VSCODE] Error checking file stats: .tmp/bump-version-w203GI/VERSION EntryNotFound (FileSystemError): Error: ENOENT: no such file or directory, stat '/workspaces/new-project-template/.tmp/bump-version-w203GI/VERSION'
[1:53:12 PM] [VSCODE] Error checking file stats: .tmp/bump-version-w203GI EntryNotFound (FileSystemError): Error: ENOENT: no such file or directory, stat '/workspaces/new-project-template/.tmp/bump-version-w203GI'
[1:53:12 PM] [VSCODE] Ignoring file: node_modules/.vite/vitest/da39a3ee5e6b4b0d3255bfef95601890afd80709/results.json
[1:53:12 PM] [VSCODE] File deleted: .tmp/bump-version-w203GI
[1:53:13 PM] Coverage was disabled due to all requests being exhausted
[1:53:13 PM] Ending test run 
[1:53:13 PM] Test run promise is finished, the queue is 0

Configuration

• VS Code version: 1.105.0-insider
• Vitest: 3.2.4
• Vitest plugin: 1.28.2
• Node.js: 22.18.0
• V8: 13.8.258.31-electron.0
• Istanbul: coverage-istanbul@3.2.4

[sheremet-va]

The latest release changes how coverage is collected which should fix the error. If it is not fixed, please created a new issue with a reproduction.

[FirstWhack]

The latest release changes how coverage is collected which should fix the error. If it is not fixed, please created a new issue with a reproduction.

Could you elaborate or share context on what's changed? For my mono repo with a vitest.workspace coverage is no longer presented (ever) on the latest versions. Reverting to 1.44.0 works fine. I would be happy to try and hone in on the problem with a reproduction, just looking for context to dig deeper. I am not seeing any obviously related PR or release notes.

[sheremet-va]

The latest release changes how coverage is collected which should fix the error. If it is not fixed, please created a new issue with a reproduction.

Could you elaborate or share context on what's changed? For my mono repo with a vitest.workspace coverage is no longer presented (ever) on the latest versions. Reverting to 1.44.0 works fine. I would be happy to try and hone in on the problem with a reproduction, just looking for context to dig deeper. I am not seeing any obviously related PR or release notes.

The coverage is now directly provided by Vitest:

vscode/packages/worker/src/reporter.ts

Line 136 in b79f104

this.rpc.onTestRunEnd(files as any, '', false, coverage)