test: convert credentials provider integration test to unit test

src/gitlab/clone/gitlab_credentials_provider.test.ts

+import * as vscode from 'vscode';
+import { tokenService } from '../../services/token_service';
+import { GITLAB_URL } from '../../../test/integration/test_infrastructure/constants';
+import { gitlabCredentialsProvider } from './gitlab_credentials_provider';
+
+jest.mock('../../services/token_service');
+
+describe('GitLab Credentials Provider', () => {
+  beforeEach(() => {
+    tokenService.getInstanceUrls = () => [GITLAB_URL];
+    tokenService.getToken = (url: string) => (url === GITLAB_URL ? 'password' : undefined);
+  });
+
+  it('getting credentials works', async () => {
+    expect(
+      (await gitlabCredentialsProvider.getCredentials(vscode.Uri.parse(GITLAB_URL)))?.password,
+    ).toBe('password');
+  });
+
+  it('returns undefined for url without token', async () => {
+    expect(
+      await gitlabCredentialsProvider.getCredentials(vscode.Uri.parse('https://invalid.com')),
+    ).toBe(undefined);
+  });
+});

test/integration/gitlab_credentials_provider.test.ts

-import * as assert from 'assert';
-import * as vscode from 'vscode';
-import { tokenService } from '../../src/services/token_service';
-import { GITLAB_URL } from './test_infrastructure/constants';
-import { gitlabCredentialsProvider } from '../../src/gitlab/clone/gitlab_credentials_provider';
-
-const token = 'abcd-secret';
-
-describe('GitLab Credentials Provider', () => {
-  before(async () => {
-    await tokenService.setToken(GITLAB_URL, token);
-  });
-
-  after(async () => {
-    await tokenService.setToken(GITLAB_URL, undefined);
-  });
-
-  it('getting credentials works', async () => {
-    assert.deepStrictEqual(
-      (await gitlabCredentialsProvider.getCredentials(vscode.Uri.parse(GITLAB_URL)))?.password,
-      token,
-      'Username and token should be equal',
-    );
-  });
-
-  it('returns undefined for url without token', async () => {
-    assert.deepStrictEqual(
-      await gitlabCredentialsProvider.getCredentials(vscode.Uri.parse('https://invalid.com')),
-      undefined,
-      'there should be no user at invalid url',
-    );
-  });
-
-  it('newly created token is used', async () => {
-    const temporaryToken = 'token';
-    await tokenService.setToken('https://test2.gitlab.com', temporaryToken);
-
-    assert.deepStrictEqual(
-      (await gitlabCredentialsProvider.getCredentials(vscode.Uri.parse('https://test2.gitlab.com')))
-        ?.password,
-      temporaryToken,
-      'Username and token should be equal',
-    );
-
-    await tokenService.setToken('https://test2.gitlab.com', undefined);
-  });
-});