fixing error (#8676)

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

Author: mattKorwel

packages/cli/src/config/config.test.ts

@@ -13,6 +13,7 @@ import {
   WriteFileTool,
   DEFAULT_GEMINI_MODEL,
   DEFAULT_GEMINI_MODEL_AUTO,
+  OutputFormat,
 } from '@google/gemini-cli-core';
 import { loadCliConfig, parseArguments, type CliArgs } from './config.js';
 import type { Settings } from './settings.js';
@@ -2095,52 +2096,54 @@ describe('loadCliConfig fileFiltering', () => {
   );
 });
 
-describe('Output Format Configuration', () => {
-  const originalArgv = process.argv;
-
-  afterEach(() => {
-    process.argv = originalArgv;
-    vi.restoreAllMocks();
+describe('Output format', () => {
+  it('should default to TEXT', async () => {
+    process.argv = ['node', 'script.js'];
+    const argv = await parseArguments({} as Settings);
+    const config = await loadCliConfig({}, [], 'test-session', argv);
+    expect(config.getOutputFormat()).toBe(OutputFormat.TEXT);
   });
 
-  it('should default to text format when no setting or flag is provided', async () => {
+  it('should use the format from settings', async () => {
     process.argv = ['node', 'script.js'];
     const argv = await parseArguments({} as Settings);
     const config = await loadCliConfig(
-      {} as Settings,
+      { output: { format: OutputFormat.JSON } },
       [],
       'test-session',
       argv,
     );
-    expect(config.getOutputFormat()).toBe(ServerConfig.OutputFormat.TEXT);
+    expect(config.getOutputFormat()).toBe(OutputFormat.JSON);
   });
 
-  it('should use the format from settings when no flag is provided', async () => {
-    process.argv = ['node', 'script.js'];
-    const settings: Settings = { output: { format: 'json' } };
-    const argv = await parseArguments(settings);
-    const config = await loadCliConfig(settings, [], 'test-session', argv);
-    expect(config.getOutputFormat()).toBe(ServerConfig.OutputFormat.JSON);
-  });
-
-  it('should use the format from the flag when provided', async () => {
+  it('should prioritize the format from argv', async () => {
     process.argv = ['node', 'script.js', '--output-format', 'json'];
     const argv = await parseArguments({} as Settings);
     const config = await loadCliConfig(
-      {} as Settings,
+      { output: { format: OutputFormat.JSON } },
       [],
       'test-session',
       argv,
     );
-    expect(config.getOutputFormat()).toBe(ServerConfig.OutputFormat.JSON);
+    expect(config.getOutputFormat()).toBe(OutputFormat.JSON);
   });
 
-  it('should prioritize the flag over the setting', async () => {
-    process.argv = ['node', 'script.js', '--output-format', 'text'];
-    const settings: Settings = { output: { format: 'json' } };
-    const argv = await parseArguments(settings);
-    const config = await loadCliConfig(settings, [], 'test-session', argv);
-    expect(config.getOutputFormat()).toBe(ServerConfig.OutputFormat.TEXT);
+  it('should error on invalid --output-format argument', async () => {
+    process.argv = ['node', 'script.js', '--output-format', 'yaml'];
+    const mockExit = vi.spyOn(process, 'exit').mockImplementation(() => {
+      throw new Error('process.exit called');
+    });
+    const mockConsoleError = vi
+      .spyOn(console, 'error')
+      .mockImplementation(() => {});
+    await expect(parseArguments({} as Settings)).rejects.toThrow(
+      'process.exit called',
+    );
+    expect(mockConsoleError).toHaveBeenCalledWith(
+      expect.stringContaining('Invalid values:'),
+    );
+    mockExit.mockRestore();
+    mockConsoleError.mockRestore();
   });
 });