BA

Better Auth•4mo ago

Nelson

How to mock better-auth with MSW?

I tried to use MSW to mock the (GitHub) OAuth flow. However, I have been unsuccessful in getting the session on the server.

Here is a minimal reproduction:
https://codesandbox.io/p/devbox/better-auth-with-msw-5dy86g

Please test on a new browser tab:
https://5dy86g-3000.csb.app/

Steps to reproduce:

1. Run the server MOCK_SERVER=true pnpm devMOCK_SERVER=true pnpm dev (if the server is running at first, please restart it with this command)
2. Go to https://5dy86g-3000.csb.app/
3. Click "Sign In"
4. Copy the statestate in the URL. E.g., &state=XXX&state=XXX, copy the XXX
5. Go to https://5dy86g-3000.csb.app/api/auth/callback/github?code=mock_github_code&state=XXX directly, paste your state at the end
6. OAuth flow is done.

Notes:

• If you're getting an invalid_codeinvalid_code error, please try to fork the codesandbox and test with your own csb terminal.
• instrumentation.tsinstrumentation.ts only runs when pnpm devpnpm dev, if any changes are made in instrumentation.tsinstrumentation.ts, please restart the next-server.