fix(coverage): global thresholds to include files from glob thresholds (#6172)

Co-authored-by: Ari Perkkiö <ari.perkkio@gmail.com>

Author: thor-juhasz

docs/config/index.md

@@ -1345,6 +1345,11 @@ Shortcut for `--coverage.thresholds.lines 100 --coverage.thresholds.functions 10
 
 Sets thresholds for files matching the glob pattern.
 
+::: tip NOTE
+Vitest counts all files, including those covered by glob-patterns, into the global coverage thresholds.
+This is different from Jest behavior.
+:::
+
 <!-- eslint-skip -->
 ```ts
 {

packages/vitest/src/utils/coverage.ts

@@ -182,7 +182,6 @@ export class BaseCoverageProvider {
   }): ResolvedThreshold[] {
     const resolvedThresholds: ResolvedThreshold[] = []
     const files = coverageMap.files()
-    const filesMatchedByGlobs: string[] = []
     const globalCoverageMap = createCoverageMap()
 
     for (const key of Object.keys(
@@ -204,7 +203,6 @@ export class BaseCoverageProvider {
       const matchingFiles = files.filter(file =>
         mm.isMatch(relative(root, file), glob),
       )
-      filesMatchedByGlobs.push(...matchingFiles)
 
       for (const file of matchingFiles) {
         const fileCoverage = coverageMap.fileCoverageFor(file)
@@ -218,10 +216,8 @@ export class BaseCoverageProvider {
       })
     }
 
-    // Global threshold is for all files that were not included by glob patterns
-    for (const file of files.filter(
-      file => !filesMatchedByGlobs.includes(file),
-    )) {
+    // Global threshold is for all files, even if they are included by glob patterns
+    for (const file of files) {
       const fileCoverage = coverageMap.fileCoverageFor(file)
       globalCoverageMap.addFileCoverage(fileCoverage)
     }

test/coverage-test/test/threshold-auto-update.test.ts

@@ -53,10 +53,10 @@ test('thresholds.autoUpdate updates thresholds', async () => {
               autoUpdate: true,
 
               // Global ones
-              lines: 66.66,
-              functions: 50,
+              lines: 55.55,
+              functions: 33.33,
               branches: 100,
-              statements: 66.66,
+              statements: 55.55,
 
               '**/src/math.ts': {
                 branches: 100,
@@ -81,10 +81,10 @@ test('thresholds.autoUpdate updates thresholds', async () => {
               autoUpdate: true,
 
               // Global ones
-              lines: 50,
-              functions: 50,
+              lines: 33.33,
+              functions: 33.33,
               branches: 100,
-              statements: 50,
+              statements: 33.33,
 
               '**/src/math.ts': {
                 branches: 100,

test/coverage-test/test/threshold-glob.test.ts

@@ -0,0 +1,33 @@
+import { expect } from 'vitest'
+import { coverageTest, isV8Provider, normalizeURL, runVitest, test } from '../utils'
+import { sum } from '../fixtures/src/math'
+import { isEven, isOdd } from '../fixtures/src/even'
+
+test('threshold glob patterns count in global coverage', async () => {
+  await runVitest({
+    include: [normalizeURL(import.meta.url)],
+    coverage: {
+      all: false,
+      include: ['**/fixtures/src/**'],
+      thresholds: {
+        'branches': 100,
+        'functions': 50,
+        'lines': isV8Provider() ? 66 : 50,
+        'statements': isV8Provider() ? 66 : 50,
+
+        '**/fixtures/src/even.ts': {
+          branches: 100,
+          functions: 100,
+          lines: 100,
+          statements: 100,
+        },
+      },
+    },
+  })
+})
+
+coverageTest('cover some lines, but not too much', () => {
+  expect(sum(1, 2)).toBe(3)
+  expect(isEven(4)).toBe(true)
+  expect(isOdd(4)).toBe(false)
+})