The login screen waits, silent, until the test begins. Your code reaches for Microsoft Entra. The handshake starts. Tokens move. Permissions assert themselves. Every step must be verified.
Integration testing Microsoft Entra is not just about authentication working once. It is about proving that identity flows hold under the weight of production traffic. Every endpoint, every redirect, every claim must match the spec—or the system fails.
First, connect your test environment to Entra with proper application registration. Use client secrets or certificates that match your deployment model. Configure redirect URIs precisely. A single mismatch will break the flow.
Next, simulate login and token exchange end-to-end. Unit tests stop short here. Integration tests drive real HTTP calls to Entra endpoints: /authorize, /token, and any protected APIs. Capture and parse ID tokens, access tokens, and refresh tokens. Verify signature, issuer, audience, and scopes.
Test how Entra responds to expired tokens. Trigger a refresh. Check that refresh tokens honor lifetime limits and that revoked credentials truly fail. Run these scenarios repeatedly to catch race conditions.