chore: added some basic oauth client cred tests

Author: PeterSchafer

test/acceptance/fake-server.ts

@@ -577,6 +577,17 @@ export const fakeServer = (basePath: string, snykToken: string): FakeServer => {
     },
   );
 
+  app.post(basePath.replace('/v1', '') + '/oauth2/token', (req, res) => {
+    const fake_oauth_token = "{\"access_token\":\"access_token_value\",\"token_type\":\"b\",\"expiry\":\"3023-12-20T08:49:15.504539Z\"}";
+
+    // client credentials grant: expecting client id = a and client secret = b
+    if ( req.headers.authorization?.includes("Basic YTpi") ) {
+      res.status(200).send(fake_oauth_token);
+    }
+
+    res.status(401).send({});
+  });
+
   const listenPromise = (port: string | number) => {
     return new Promise<void>((resolve) => {
       server = http.createServer(app).listen(Number(port), resolve);

test/jest/acceptance/auth.spec.ts

@@ -0,0 +1,45 @@
+import { fakeServer } from '../../acceptance/fake-server';
+import { createProjectFromWorkspace } from '../util/createProject';
+import { runSnykCLI } from '../util/runSnykCLI';
+
+jest.setTimeout(1000 * 60);
+
+describe('Auth', () => {
+  let server: ReturnType<typeof fakeServer>;
+  let env: Record<string, string>;
+
+  beforeAll((done) => {
+    const apiPath = '/api/v1';
+    const apiPort = process.env.PORT || process.env.SNYK_PORT || '12345';
+    env = {
+      ...process.env,
+      SNYK_API: 'http://localhost:' + apiPort + apiPath,
+      SNYK_DISABLE_ANALYTICS: '1',
+    };
+
+    server = fakeServer(apiPath, env.SNYK_TOKEN);
+    server.listen(apiPort, () => done());
+  });
+
+  afterEach(() => {
+    server.restore();
+  });
+
+  afterAll((done) => {
+    server.close(() => done());
+  });
+
+  it('successfully uses oauth client credentials grant to authenticate', async () => {
+    const {code} = await runSnykCLI(`auth --auth-type=oauth --client-id a --client-secret b`, {
+      env,
+    });
+    expect(code).toEqual(0);
+  });
+
+  it('fails to us oauth client credentials grant to authenticate', async () => {
+    const {code} = await runSnykCLI(`auth --auth-type=oauth --client-id wrong --client-secret b`, {
+      env,
+    });
+    expect(code).toEqual(2);
+  });
+});