fix: add missing import and update tests for branch template feature (#799)

* fix: add missing import and update tests for branch template feature

- Add missing `import { $ } from 'bun'` in branch.ts
- Add missing `labels` property to pull-request-target.test.ts fixture
- Update branch-template tests to expect 5-word descriptions

* address review feedback: update comment and add truncation test

test/branch-template.test.ts

@@ -156,7 +156,7 @@ describe("branch template utilities", () => {
         "Fix login bug with OAuth",
       );
 
-      expect(result).toBe("feature/fix-login-bug/123");
+      expect(result).toBe("feature/fix-login-bug-with-oauth/123");
     });
 
     it("should handle template with multiple variables including description", () => {
@@ -172,7 +172,9 @@ describe("branch template utilities", () => {
         "User authentication fails completely",
       );
 
-      expect(result).toBe("dev/bug/user-authentication-fails-issue_456");
+      expect(result).toBe(
+        "dev/bug/user-authentication-fails-completely-issue_456",
+      );
     });
 
     it("should handle description with special characters in template", () => {
@@ -187,7 +189,20 @@ describe("branch template utilities", () => {
         "Add: User Registration & Email Validation",
       );
 
-      expect(result).toBe("fix/add-user-registration-789");
+      expect(result).toBe("fix/add-user-registration-email-789");
+    });
+
+    it("should truncate descriptions to exactly 5 words", () => {
+      const result = generateBranchName(
+        "{{prefix}}{{description}}/{{entityNumber}}",
+        "feature/",
+        "issue",
+        999,
+        undefined,
+        undefined,
+        "This is a very long title with many more than five words in it",
+      );
+      expect(result).toBe("feature/this-is-a-very-long/999");
     });
 
     it("should handle empty description in template", () => {

test/pull-request-target.test.ts

@@ -87,6 +87,7 @@ describe("pull_request_target event support", () => {
       },
       comments: { nodes: [] },
       reviews: { nodes: [] },
+      labels: { nodes: [] },
     },
     comments: [],
     changedFiles: [],