test: restore all-skipped coverage guard with custom reporter

Signed-off-by: CrazyMax <1951866+crazy-max@users.noreply.github.com>

.github/workflows/test.yml

@@ -47,7 +47,7 @@ jobs:
       -
         name: Check coverage
         run: |
-          if [ -f ./coverage/clover.xml ]; then
+          if [ -f ./coverage/clover.xml ] && [ ! -f ./coverage/allSkipped.txt ]; then
             echo "RUN_CODECOV=true" >> $GITHUB_ENV
           else
             echo "RUN_CODECOV=false" >> $GITHUB_ENV
@@ -217,7 +217,7 @@ jobs:
       -
         name: Check coverage
         run: |
-          if [ -f ./coverage/clover.xml ]; then
+          if [ -f ./coverage/clover.xml ] && [ ! -f ./coverage/allSkipped.txt ]; then
             echo "RUN_CODECOV=true" >> $GITHUB_ENV
           else
             echo "RUN_CODECOV=false" >> $GITHUB_ENV

__tests__/.setup/skipped-reporter.d.mts

@@ -0,0 +1,19 @@
+/**
+ * Copyright 2026 actions-toolkit authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import type {Reporter} from 'vitest/node';
+
+export declare const vitestAllSkippedReporter: () => Reporter;

__tests__/.setup/skipped-reporter.mjs

@@ -0,0 +1,59 @@
+/**
+ * Copyright 2026 actions-toolkit authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import fs from 'node:fs';
+import path from 'node:path';
+
+export const vitestAllSkippedReporter = () => {
+  let vitest;
+  let hasExecutedTest;
+  let hasAnyCollectedTest;
+
+  const getFlagPath = () => {
+    const reportsDirectory = vitest?.config?.coverage?.reportsDirectory ?? 'coverage';
+    return path.join(reportsDirectory, 'allSkipped.txt');
+  };
+
+  return {
+    onInit(ctx) {
+      vitest = ctx;
+      hasExecutedTest = false;
+      hasAnyCollectedTest = false;
+    },
+    onTestCaseReady() {
+      hasAnyCollectedTest = true;
+    },
+    onTestCaseResult(testCase) {
+      const state = testCase.result()?.state;
+      if (state === 'passed' || state === 'failed') {
+        hasExecutedTest = true;
+      }
+    },
+    onTestRunEnd() {
+      if (!vitest?.config?.coverage?.enabled) {
+        return;
+      }
+      const allSkipped = hasAnyCollectedTest && !hasExecutedTest;
+      const flagPath = getFlagPath();
+      if (allSkipped) {
+        fs.mkdirSync(path.dirname(flagPath), {recursive: true});
+        fs.writeFileSync(flagPath, '');
+      } else if (fs.existsSync(flagPath)) {
+        fs.rmSync(flagPath);
+      }
+    }
+  };
+};

vitest.config.itg.ts

@@ -15,6 +15,7 @@
  */
 
 import {defineConfig} from 'vitest/config';
+import {vitestAllSkippedReporter} from './__tests__/.setup/skipped-reporter.mjs';
 
 export default defineConfig({
   test: {
@@ -22,11 +23,12 @@ export default defineConfig({
     environment: 'node',
     include: ['**/*.test.itg.ts'],
     testTimeout: 1800000,
+    reporters: ['default', vitestAllSkippedReporter()],
     coverage: {
       provider: 'v8',
       reporter: ['clover'],
       include: ['src/**/*.ts'],
-      exclude: ['src/**/index.ts']
+      exclude: ['src/**/index.ts', '__tests__/**', 'lib/**']
     }
   }
 });

vitest.config.ts

@@ -15,6 +15,7 @@
  */
 
 import {defineConfig} from 'vitest/config';
+import {vitestAllSkippedReporter} from './__tests__/.setup/skipped-reporter.mjs';
 
 export default defineConfig({
   test: {
@@ -22,11 +23,12 @@ export default defineConfig({
     environment: 'node',
     setupFiles: ['./__tests__/.setup/setup.unit.ts'],
     include: ['**/*.test.ts'],
+    reporters: ['default', vitestAllSkippedReporter()],
     coverage: {
       provider: 'v8',
       reporter: ['clover'],
       include: ['src/**/*.ts'],
-      exclude: ['src/**/index.ts']
+      exclude: ['src/**/index.ts', '__tests__/**', 'lib/**']
     }
   }
 });