fix(browser): source maps of in-source tests

Author: AriPerkkio

packages/browser/src/node/plugin.ts

@@ -382,11 +382,13 @@ export default (parentServer: ParentBrowserProject, base = '/'): Plugin[] => {
     {
       name: 'vitest:browser:in-source-tests',
       transform(code, id) {
+        const filename = cleanUrl(id)
         const project = parentServer.vitest.getProjectByName(parentServer.config.name)
-        if (!project._isCachedTestFile(id) || !code.includes('import.meta.vitest')) {
+
+        if (!project._isCachedTestFile(filename) || !code.includes('import.meta.vitest')) {
           return
         }
-        const s = new MagicString(code, { filename: cleanUrl(id) })
+        const s = new MagicString(code, { filename })
         s.prepend(
           `import.meta.vitest = __vitest_index__;\n`,
         )

test/coverage-test/test/in-source.test.ts

@@ -1,5 +1,5 @@
 import { expect } from 'vitest'
-import { readCoverageMap, runVitest, test } from '../utils'
+import { isV8Provider, readCoverageMap, runVitest, test } from '../utils'
 
 test('in-source tests work', async () => {
   const { stdout } = await runVitest({
@@ -18,4 +18,30 @@ test('in-source tests work', async () => {
       "<process-cwd>/fixtures/src/in-source.ts",
     ]
   `)
+
+  const fileCoverage = coverageMap.fileCoverageFor('<process-cwd>/fixtures/src/in-source.ts')
+
+  // If-branch is not taken - makes sure source maps are correct in in-source testing too
+  expect(fileCoverage.getUncoveredLines()).toContain('5')
+
+  if (isV8Provider()) {
+    expect(fileCoverage).toMatchInlineSnapshot(`
+      {
+        "branches": "2/4 (50%)",
+        "functions": "1/1 (100%)",
+        "lines": "10/12 (83.33%)",
+        "statements": "10/12 (83.33%)",
+      }
+    `)
+  }
+  else {
+    expect(fileCoverage).toMatchInlineSnapshot(`
+      {
+        "branches": "3/6 (50%)",
+        "functions": "2/2 (100%)",
+        "lines": "6/7 (85.71%)",
+        "statements": "6/7 (85.71%)",
+      }
+    `)
+  }
 })