feat(prd-6): verify workflow triggers and add assignee_trigger (#13)

test/image-downloader.test.ts

@@ -8,20 +8,28 @@ import {
   jest,
   setSystemTime,
 } from "bun:test";
-import fs from "fs/promises";
-import { downloadCommentImages } from "../src/github/utils/image-downloader";
-import type { CommentWithImages } from "../src/github/utils/image-downloader";
+import {
+  downloadCommentImages,
+  _fsForTest,
+  type CommentWithImages,
+} from "../src/github/utils/image-downloader";
 import type { Octokits } from "../src/github/api/client";
 
 describe("downloadCommentImages", () => {
   let consoleLogSpy: any;
   let consoleWarnSpy: any;
   let consoleErrorSpy: any;
-  let fsMkdirSpy: any;
-  let fsWriteFileSpy: any;
   let fetchSpy: any;
   let savedServerUrl: string | undefined;
 
+  // Store originals for restoration
+  const origMkdir = _fsForTest.mkdir;
+  const origWriteFile = _fsForTest.writeFile;
+
+  // Mock functions for fs operations
+  const mockMkdir = jest.fn().mockResolvedValue(undefined);
+  const mockWriteFile = jest.fn().mockResolvedValue(undefined);
+
   beforeEach(() => {
     // Pin GITHUB_SERVER_URL so tests pass regardless of runner environment.
     // The image-downloader reads process.env directly at call time.
@@ -33,9 +41,11 @@ describe("downloadCommentImages", () => {
     consoleWarnSpy = spyOn(console, "warn").mockImplementation(() => {});
     consoleErrorSpy = spyOn(console, "error").mockImplementation(() => {});
 
-    // Spy on fs methods
-    fsMkdirSpy = spyOn(fs, "mkdir").mockResolvedValue(undefined);
-    fsWriteFileSpy = spyOn(fs, "writeFile").mockResolvedValue(undefined);
+    // Override _fsForTest methods directly — works cross-platform
+    mockMkdir.mockClear();
+    mockWriteFile.mockClear();
+    _fsForTest.mkdir = mockMkdir as any;
+    _fsForTest.writeFile = mockWriteFile as any;
 
     // Set fake system time for consistent filenames
     setSystemTime(new Date("2024-01-01T00:00:00.000Z")); // 1704067200000
@@ -49,11 +59,13 @@ describe("downloadCommentImages", () => {
       delete process.env.GITHUB_SERVER_URL;
     }
 
+    // Restore original fs methods
+    _fsForTest.mkdir = origMkdir;
+    _fsForTest.writeFile = origWriteFile;
+
     consoleLogSpy.mockRestore();
     consoleWarnSpy.mockRestore();
     consoleErrorSpy.mockRestore();
-    fsMkdirSpy.mockRestore();
-    fsWriteFileSpy.mockRestore();
     if (fetchSpy) fetchSpy.mockRestore();
     setSystemTime(); // Reset to real time
   });
@@ -80,7 +92,7 @@ describe("downloadCommentImages", () => {
 
     await downloadCommentImages(mockOctokit, "owner", "repo", comments);
 
-    expect(fsMkdirSpy).toHaveBeenCalledWith("/tmp/github-images", {
+    expect(mockMkdir).toHaveBeenCalledWith("/tmp/github-images", {
       recursive: true,
     });
   });
@@ -153,7 +165,7 @@ describe("downloadCommentImages", () => {
     });
 
     expect(fetchSpy).toHaveBeenCalledWith(signedUrl);
-    expect(fsWriteFileSpy).toHaveBeenCalledWith(
+    expect(mockWriteFile).toHaveBeenCalledWith(
       "/tmp/github-images/image-1704067200000-0.png",
       Buffer.from(mockArrayBuffer),
     );
@@ -628,7 +640,7 @@ describe("downloadCommentImages", () => {
       );
 
       // Reset for next iteration
-      fsWriteFileSpy.mockClear();
+      mockWriteFile.mockClear();
       callIndex++;
     }
   });
@@ -721,7 +733,7 @@ describe("downloadCommentImages", () => {
     });
 
     expect(fetchSpy).toHaveBeenCalledWith(signedUrl);
-    expect(fsWriteFileSpy).toHaveBeenCalledWith(
+    expect(mockWriteFile).toHaveBeenCalledWith(
       "/tmp/github-images/image-1704067200000-0.png",
       Buffer.from(mockArrayBuffer),
     );