fix(core): Add .geminiignore support to SearchText tool (#13763)

Co-authored-by: Gaurav <39389231+gsquared94@users.noreply.github.com>

packages/core/src/utils/geminiIgnoreParser.test.ts

@@ -58,6 +58,25 @@ describe('GeminiIgnoreParser', () => {
         false,
       );
     });
+
+    it('should return ignore file path when patterns exist', () => {
+      const parser = new GeminiIgnoreParser(projectRoot);
+      expect(parser.getIgnoreFilePath()).toBe(
+        path.join(projectRoot, '.geminiignore'),
+      );
+    });
+
+    it('should return true for hasPatterns when patterns exist', () => {
+      const parser = new GeminiIgnoreParser(projectRoot);
+      expect(parser.hasPatterns()).toBe(true);
+    });
+
+    it('should return false for hasPatterns when .geminiignore is deleted', async () => {
+      const parser = new GeminiIgnoreParser(projectRoot);
+      await fs.rm(path.join(projectRoot, '.geminiignore'));
+      expect(parser.hasPatterns()).toBe(false);
+      expect(parser.getIgnoreFilePath()).toBeNull();
+    });
   });
 
   describe('when .geminiignore does not exist', () => {
@@ -66,5 +85,50 @@ describe('GeminiIgnoreParser', () => {
       expect(parser.getPatterns()).toEqual([]);
       expect(parser.isIgnored('any_file.txt')).toBe(false);
     });
+
+    it('should return null for getIgnoreFilePath when no patterns exist', () => {
+      const parser = new GeminiIgnoreParser(projectRoot);
+      expect(parser.getIgnoreFilePath()).toBeNull();
+    });
+
+    it('should return false for hasPatterns when no patterns exist', () => {
+      const parser = new GeminiIgnoreParser(projectRoot);
+      expect(parser.hasPatterns()).toBe(false);
+    });
+  });
+
+  describe('when .geminiignore is empty', () => {
+    beforeEach(async () => {
+      await createTestFile('.geminiignore', '');
+    });
+
+    it('should return null for getIgnoreFilePath', () => {
+      const parser = new GeminiIgnoreParser(projectRoot);
+      expect(parser.getIgnoreFilePath()).toBeNull();
+    });
+
+    it('should return false for hasPatterns', () => {
+      const parser = new GeminiIgnoreParser(projectRoot);
+      expect(parser.hasPatterns()).toBe(false);
+    });
+  });
+
+  describe('when .geminiignore only has comments', () => {
+    beforeEach(async () => {
+      await createTestFile(
+        '.geminiignore',
+        '# This is a comment\n# Another comment\n',
+      );
+    });
+
+    it('should return null for getIgnoreFilePath', () => {
+      const parser = new GeminiIgnoreParser(projectRoot);
+      expect(parser.getIgnoreFilePath()).toBeNull();
+    });
+
+    it('should return false for hasPatterns', () => {
+      const parser = new GeminiIgnoreParser(projectRoot);
+      expect(parser.hasPatterns()).toBe(false);
+    });
   });
 });