feat: add Copy Failing Tests Output command with stack traces by BLamy · Pull Request #676 · vitest-dev/vscode

BLamy · 2025-10-29T06:04:45Z

Make it so I can copy the test output in a format consumable by an LLM

Example Output

Test: first pass: 2 => 1 (11.296134000000052ms)
File: /workspaces/vscode/samples/basic/test/each.test.ts

Error:
expected 2 to be 1 // Object.is equality

Stack trace:
  at  (/workspaces/vscode/samples/basic/test/each.test.ts:12:15)

    10 |     [1, 1], [2, 1], [3, 1]
    11 |   ])(`first pass: %i => %i`, (a, b) => {
>  12 |     expect(a).toBe(b)
                           ^ expected 2 to be 1 // Object.is equality
    13 |   })
    14 |   it.each([

================================================================================

Test: first pass: 3 => 1 (1.7611650000000054ms)
File: /workspaces/vscode/samples/basic/test/each.test.ts

Error:
expected 3 to be 1 // Object.is equality

Stack trace:
  at  (/workspaces/vscode/samples/basic/test/each.test.ts:12:15)

    10 |     [1, 1], [2, 1], [3, 1]
    11 |   ])(`first pass: %i => %i`, (a, b) => {
>  12 |     expect(a).toBe(b)
                           ^ expected 3 to be 1 // Object.is equality
    13 |   })
    14 |   it.each([

================================================================================

Test: last pass: 3 => 1 (0.9905889999999999ms)
File: /workspaces/vscode/samples/basic/test/each.test.ts

Error:
expected 3 to be 1 // Object.is equality

Stack trace:
  at  (/workspaces/vscode/samples/basic/test/each.test.ts:17:15)

    15 |     [1, 1], [2, 2], [3, 1]
    16 |   ])(`last pass: %i => %i`, (a, b) => {
>  17 |     expect(a).toBe(b)
                           ^ expected 3 to be 1 // Object.is equality
    18 |   })
    19 |   it.each([

================================================================================

Test: first fail: 3 => 1 (0.6461950000000343ms)
File: /workspaces/vscode/samples/basic/test/each.test.ts

Error:
expected 3 to be 1 // Object.is equality

Stack trace:
  at  (/workspaces/vscode/samples/basic/test/each.test.ts:22:15)

    20 |     [1, 1], [2, 2], [3, 1]
    21 |   ])(`first fail: %i => %i`, (a, b) => {
>  22 |     expect(a).toBe(b)
                           ^ expected 3 to be 1 // Object.is equality
    23 |   })
    24 |   it.each([

================================================================================

Test: last fail: 3 => 1 (1.9933630000000448ms)
File: /workspaces/vscode/samples/basic/test/each.test.ts

Error:
expected 3 to be 1 // Object.is equality

Stack trace:
  at  (/workspaces/vscode/samples/basic/test/each.test.ts:27:15)

    25 |     [1, 1], [2, 2], [3, 1]
    26 |   ])(`last fail: %i => %i`, (a, b) => {
>  27 |     expect(a).toBe(b)
                           ^ expected 3 to be 1 // Object.is equality
    28 |   })
    29 |   it.each([

================================================================================

Test: all fail: 1 => 0 (0.6465260000001081ms)
File: /workspaces/vscode/samples/basic/test/each.test.ts

Error:
expected 1 to be +0 // Object.is equality

Stack trace:
  at  (/workspaces/vscode/samples/basic/test/each.test.ts:32:15)

    30 |     [1, 0], [2, 0], [3, 0]
    31 |   ])(`all fail: %i => %i`, (a, b) => {
>  32 |     expect(a).toBe(b)
                           ^ expected 1 to be +0 // Object.is equality
    33 |   })
    34 |   it.each([

================================================================================

Test: all fail: 2 => 0 (0.5327340000000049ms)
File: /workspaces/vscode/samples/basic/test/each.test.ts

Error:
expected 2 to be +0 // Object.is equality

Stack trace:
  at  (/workspaces/vscode/samples/basic/test/each.test.ts:32:15)

    30 |     [1, 0], [2, 0], [3, 0]
    31 |   ])(`all fail: %i => %i`, (a, b) => {
>  32 |     expect(a).toBe(b)
                           ^ expected 2 to be +0 // Object.is equality
    33 |   })
    34 |   it.each([

================================================================================

Test: all fail: 3 => 0 (1.173998000000097ms)
File: /workspaces/vscode/samples/basic/test/each.test.ts

Error:
expected 3 to be +0 // Object.is equality

Stack trace:
  at  (/workspaces/vscode/samples/basic/test/each.test.ts:32:15)

    30 |     [1, 0], [2, 0], [3, 0]
    31 |   ])(`all fail: %i => %i`, (a, b) => {
>  32 |     expect(a).toBe(b)
                           ^ expected 3 to be +0 // Object.is equality
    33 |   })
    34 |   it.each([

================================================================================

Test: fail (5.867705000000001ms)
File: /workspaces/vscode/samples/basic/test/bug.test.ts

Error:
expected 1 to deeply equal 2

Stack trace:
  at  (/workspaces/vscode/samples/basic/test/bug.test.ts:3:13)

     1 | import { expect, test } from 'vitest';
     2 | test('fail', () => {
>   3 |   expect(1).toEqual(2);
                         ^ expected 1 to deeply equal 2
     4 | })

================================================================================

Test: fails with error thrown (5.684620999999993ms)
File: /workspaces/vscode/samples/basic/test/throw.test.ts

Error:
Something went wrong

Stack trace:
  at doSomething (/workspaces/vscode/samples/basic/src/add.ts:16:9)

    14 | 
    15 | function doSomething() {
>  16 |   throw new Error('Something went wrong');
                     ^ Something went wrong
    17 | }
    18 | 

  at addError (/workspaces/vscode/samples/basic/src/add.ts:11:3)

     9 | 
    10 | export function addError(from: number, to: number) {
>  11 |   doSomething()
               ^ Something went wrong
    12 |   return add(from, to)
    13 | }

  at  (/workspaces/vscode/samples/basic/test/throw.test.ts:10:12)

     8 | 
     9 |   it('fails with error thrown', () => {
>  10 |     expect(addError(1, 1)).toBe(2)
                        ^ Something went wrong
    11 |   })
    12 | })

- Add TestResult interface to track test results (status, messages, duration, timestamp) - Extend TestCase class with lastResult property and setResult() method - Update TestRunner.markTestCase() to persist test results in TestCase instances - Add TestTree.getFailingTests() to collect all failing tests - Add vitest.copyFailingTestsOutput command that: - Collects all failing tests from the test tree - Formats output with test name, file path, duration, error messages, and stack traces - Copies formatted output to clipboard - Shows notification with count of failing tests - Register command in package.json and testing/item/context menu Co-authored-by: Ona <no-reply@ona.com>

- Read source files to display code context around errors - Show 2 lines before and after the error line - Add line numbers with 4-digit padding - Add arrow (>) to highlight the error line - Add caret (^) pointer to exact column position - Include error message inline with the pointer - Fallback to simple location if file cannot be read Example output: at functionName (file.ts:41:19) 39 | // Check that the page has a title 40 | const title = await page.title(); > 41 | expect(title).toBeTruthy(); | ^ expected undefined to be true Co-authored-by: Ona <no-reply@ona.com>

Co-authored-by: Ona <no-reply@ona.com>

- Exclude .pnpm-store directory - Exclude .devcontainer directory - Exclude tsconfig.tsbuildinfo - Exclude packages node_modules, src, and tsconfig.json This reduces the VSIX package size from 388MB to 629KB. Co-authored-by: Ona <no-reply@ona.com>

sheremet-va · 2025-10-30T13:03:58Z

packages/extension/src/extension.ts

        const tokenSource = new vscode.CancellationTokenSource()
        await profile.runHandler(request, tokenSource.token)
      }),
+      vscode.commands.registerCommand('vitest.copyFailingTestsOutput', async () => {


I am confused why you don't use the test item here to get the errors from there? With this implementation, the copy button will copy all errors whenever you call this

BLamy and others added 4 commits October 29, 2025 05:44

formatting

e4a6b14

Co-authored-by: Ona <no-reply@ona.com>

sheremet-va requested changes Oct 30, 2025

View reviewed changes

This was referenced Jan 9, 2026

feat: use reporters in the test results panel #707

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Proposal: Improve Test Results Output for AI and Manual Debugging #709

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feat: add Copy Failing Tests Output command with stack traces#676

feat: add Copy Failing Tests Output command with stack traces#676
BLamy wants to merge 4 commits intovitest-dev:mainfrom
BLamy:copy-failing-tests-output

BLamy commented Oct 29, 2025

Uh oh!

sheremet-va Oct 30, 2025

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BLamy commented Oct 29, 2025

Example Output

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sheremet-va Oct 30, 2025

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