refactor: rename filterMetaField to filterMeta and support truthy/falsy

nami8824 · nami8824 · commit 61de1eb88b14 · 2026-04-08T14:35:20.000+09:00
diff --git a/docs/guide/reporters.md b/docs/guide/reporters.md
@@ -417,14 +417,14 @@ Example of a JSON report:
 Since Vitest 3, the JSON reporter includes coverage information in `coverageMap` if coverage is enabled.
 :::
 
-The `meta` field in each assertion result can be filtered via the `filterMetaField` reporter option. It receives the key and value of each field and should return `false` to exclude the field from the report:
+The `meta` field in each assertion result can be filtered via the `filterMeta` reporter option. It receives the key and value of each field and should return a falsy value to exclude the field from the report:
 
 ```ts
 export default defineConfig({
   test: {
     reporters: [
       ['json', {
-        filterMetaField: (key, value) => key !== 'internalField',
+        filterMeta: (key, value) => key !== 'internalField',
       }]
     ]
   },
diff --git a/packages/vitest/src/node/reporters/json.ts b/packages/vitest/src/node/reporters/json.ts
@@ -74,7 +74,7 @@ export interface JsonTestResults {
 
 export interface JsonOptions {
   outputFile?: string
-  filterMetaField?: (key: string, value: unknown) => boolean
+  filterMeta?: (key: string, value: unknown) => unknown
 }
 
 export class JsonReporter implements Reporter {
@@ -122,7 +122,7 @@ export class JsonReporter implements Reporter {
     const testResults: Array<JsonTestResult> = []
 
     const success = !!(files.length > 0 || this.ctx.config.passWithNoTests) && numFailedTestSuites === 0 && numFailedTests === 0
-    const { filterMetaField } = this.options
+    const { filterMeta } = this.options
 
     for (const file of files) {
       const tests = getTests([file])
@@ -163,12 +163,16 @@ export class JsonReporter implements Reporter {
           failureMessages:
             t.result?.errors?.map(e => e.stack || e.message) || [],
           location: t.location,
-          meta: filterMetaField
-            ? Object.fromEntries(
-              Object.entries(t.meta).filter(([key, value]) =>
-                filterMetaField(key, value),
-              ),
-            ) as TaskMeta
+          meta: filterMeta
+            ? (() => {
+                const filtered: Record<string, unknown> = {}
+                for (const [key, value] of Object.entries(t.meta)) {
+                  if (filterMeta(key, value)) {
+                    filtered[key] = value
+                  }
+                }
+                return filtered
+              })()
             : t.meta,
           tags: t.tags || [],
         } satisfies JsonAssertionResult
diff --git a/test/cli/test/reporters/json.test.ts b/test/cli/test/reporters/json.test.ts
@@ -139,7 +139,7 @@ describe('json reporter', async () => {
     expect(data.testResults[0].status).toBe(expected)
   })
 
-  it('includes all meta fields when filterMetaField is not set', async () => {
+  it('includes all meta fields when filterMeta is not set', async () => {
     const { stdout } = await runVitest({
       reporters: 'json',
       root,
@@ -153,10 +153,10 @@ describe('json reporter', async () => {
     expect(passing.meta).toEqual({ custom: 'Passing test added this' })
   })
 
-  it('filterMetaField filters meta fields by key', async () => {
+  it('filterMeta filters meta fields by key', async () => {
     const { stdout } = await runVitest({
       reporters: [['json', {
-        filterMetaField: key => key !== 'custom',
+        filterMeta: key => key !== 'custom',
       }]],
       root,
       include: ['**/json-meta.test.ts'],
