[cli] fix vc bisect off by one (#8399)

Co-authored-by: Nathan Rajlich <n@n8.io>

packages/cli/test/unit/commands/bisect.test.ts

@@ -0,0 +1,55 @@
+import { client } from '../../mocks/client';
+import { useUser } from '../../mocks/user';
+import bisect from '../../../src/commands/bisect';
+import { useDeployment } from '../../mocks/deployment';
+
+describe('bisect', () => {
+  it('should find the bad deployment', async () => {
+    const user = useUser();
+
+    const now = Date.now();
+    const deployment1 = useDeployment({ creator: user, createdAt: now });
+    const deployment2 = useDeployment({
+      creator: user,
+      createdAt: now + 10000,
+    });
+    const deployment3 = useDeployment({
+      creator: user,
+      createdAt: now + 20000,
+    });
+
+    // also create an extra deployment before the known good deployment
+    // to make sure the bisect pool doesn't include it
+    useDeployment({
+      creator: user,
+      createdAt: now - 30000,
+    });
+
+    const bisectPromise = bisect(client);
+
+    await expect(client.stderr).toOutput('Specify a URL where the bug occurs:');
+    client.stdin.write(`https://${deployment3.url}\n`);
+
+    await expect(client.stderr).toOutput(
+      'Specify a URL where the bug does not occur:'
+    );
+    client.stdin.write(`https://${deployment1.url}\n`);
+
+    await expect(client.stderr).toOutput(
+      'Specify the URL subpath where the bug occurs:'
+    );
+    client.stdin.write('/docs\n');
+
+    await expect(client.stderr).toOutput('Bisecting');
+    await expect(client.stderr).toOutput(
+      `Deployment URL: https://${deployment2.url}`
+    );
+    client.stdin.write('b\n');
+
+    await expect(client.stderr).toOutput(
+      `The first bad deployment is: https://${deployment2.url}`
+    );
+
+    await expect(bisectPromise).resolves.toEqual(0);
+  });
+});