test: stabilize github mock setup since ESM

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

__tests__/setup.unit.ts

@@ -1,32 +1,11 @@
 import fs from 'node:fs';
-import {createRequire} from 'node:module';
 import os from 'node:os';
 import path from 'node:path';
 import {vi} from 'vitest';
 
 const tmpDir = fs.mkdtempSync(path.join(os.tmpdir(), 'docker-metadata-action-'));
 
-process.env = Object.assign({}, process.env, {
+const githubPayload = {
-  TEMP: tmpDir,
-  GITHUB_REPOSITORY: 'docker/metadata-action',
-  RUNNER_TEMP: path.join(tmpDir, 'runner-temp'),
-  RUNNER_TOOL_CACHE: path.join(tmpDir, 'runner-tool-cache')
-});
-
-const require = createRequire(import.meta.url);
-type RequireCacheEntry = NonNullable<(typeof require.cache)[string]>;
-
-const githubMock = {
-  context: {
-    repo: {
-      owner: 'docker',
-      repo: 'actions-toolkit'
-    },
-    ref: 'refs/heads/dev',
-    sha: '5f3331d7f7044c18ca9f12c77d961c4d7cf3276a',
-    runId: 2188748038,
-    runNumber: 15,
-    payload: {
   after: '860c1904a1ce19322e91ac35af1ab07466440c37',
   base_ref: null,
   before: '5f3331d7f7044c18ca9f12c77d961c4d7cf3276a',
@@ -43,11 +22,11 @@ const githubMock = {
         username: 'crazy-max'
       },
       distinct: true,
-          id: '860c1904a1ce19322e91ac35af1ab07466440c37',
+      id: '5f3331d7f7044c18ca9f12c77d961c4d7cf3276a',
       message: 'hello dev',
-          timestamp: '2022-04-19T11:27:24+02:00',
+      timestamp: '2024-11-13T13:42:28Z',
       tree_id: 'd2c60af597e863787d2d27f569e30495b0b92820',
-          url: 'https://github.com/docker/test-docker-action/commit/860c1904a1ce19322e91ac35af1ab07466440c37'
+      url: 'https://github.com/docker/test-docker-action/commit/5f3331d7f7044c18ca9f12c77d961c4d7cf3276a'
     }
   ],
   compare: 'https://github.com/docker/test-docker-action/compare/5f3331d7f704...860c1904a1ce',
@@ -66,11 +45,11 @@ const githubMock = {
       username: 'crazy-max'
     },
     distinct: true,
-        id: '860c1904a1ce19322e91ac35af1ab07466440c37',
+    id: '5f3331d7f7044c18ca9f12c77d961c4d7cf3276a',
     message: 'hello dev',
-        timestamp: '2022-04-19T11:27:24+02:00',
+    timestamp: '2024-11-13T13:42:28Z',
     tree_id: 'd2c60af597e863787d2d27f569e30495b0b92820',
-        url: 'https://github.com/docker/test-docker-action/commit/860c1904a1ce19322e91ac35af1ab07466440c37'
+    url: 'https://github.com/docker/test-docker-action/commit/5f3331d7f7044c18ca9f12c77d961c4d7cf3276a'
   },
   organization: {
     avatar_url: 'https://avatars.githubusercontent.com/u/5429470?v=4',
@@ -220,12 +199,26 @@ const githubMock = {
     type: 'User',
     url: 'https://api.github.com/users/crazy-max'
   }
-    }
+};
-  },
+
-  getOctokit: () => ({
+const githubEventPath = path.join(tmpDir, 'github-event.json');
-    rest: {
+fs.writeFileSync(githubEventPath, JSON.stringify(githubPayload));
-      repos: {
+
-        getCommit: async () => ({
+process.env = Object.assign({}, process.env, {
+  TEMP: tmpDir,
+  GITHUB_REPOSITORY: 'docker/metadata-action',
+  GITHUB_REF: 'refs/heads/dev',
+  GITHUB_RUN_ID: '2188748038',
+  GITHUB_RUN_ATTEMPT: '1',
+  GITHUB_RUN_NUMBER: '15',
+  GITHUB_SHA: '5f3331d7f7044c18ca9f12c77d961c4d7cf3276a',
+  GITHUB_EVENT_PATH: githubEventPath,
+  RUNNER_TEMP: path.join(tmpDir, 'runner-temp'),
+  RUNNER_TOOL_CACHE: path.join(tmpDir, 'runner-tool-cache')
+});
+
+const getCommitMock = vi.hoisted(() =>
+  vi.fn(async () => ({
     data: {
       commit: {
         committer: {
@@ -233,27 +226,27 @@ const githubMock = {
         }
       }
     }
-        })
+  }))
+);
+
+const getOctokitMock = vi.hoisted(() =>
+  vi.fn(() => ({
+    rest: {
+      repos: {
+        getCommit: getCommitMock
       }
     }
-  })
+  }))
+);
+
+vi.mock('@actions/github', async importOriginal => {
+  const actual = await importOriginal<typeof import('@actions/github')>();
+  return {
+    ...actual,
+    context: {
+      ...actual.context,
+      payload: githubPayload
+    },
+    getOctokit: getOctokitMock
   };
-
+});
-vi.mock('@actions/github', () => githubMock);
-
-for (const mod of ['@actions/github', '@docker/actions-toolkit/node_modules/@actions/github']) {
-  try {
-    const resolved = require.resolve(mod);
-    vi.doMock(resolved, () => githubMock);
-    require.cache[resolved] = {
-      id: resolved,
-      filename: resolved,
-      loaded: true,
-      exports: githubMock,
-      children: [],
-      paths: []
-    } as RequireCacheEntry;
-  } catch {
-    // Ignore unresolved optional paths; vi.mock handles module-level mocking.
-  }
-}