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Letro Bot c81cf73b75 fix: complete mock move by removing root-level duplicates

The previous commit copied mocks to mocks/ but didn't delete
the originals. This removes the root-level mock_synapse.py and
mock-google-oidc/, updates path references in the mocks/ copies,
and adds config.yaml to .gitignore.

2026-04-07 14:22:14 +03:30

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Mock Google OIDC Provider

A lightweight mock OpenID Connect provider that simulates Google login for local MAS development. It lets you test the upstream OAuth2 / "Sign in with Google" flow without needing real Google credentials.

Prerequisites

Node.js 18+
MAS configured with an upstream OAuth2 provider pointing to this mock

Quick start

cd mocks/mock-google-oidc
npm install
npm start

The server starts at http://localhost:5556.

How it works

The mock uses oidc-provider to run a standards-compliant OIDC server with dev interactions enabled. When MAS redirects to the mock for login, you'll see a simple form where you can enter any email-like value (e.g. taylor@gmail.com). The mock will return that as the authenticated user with synthetic profile claims.

MAS configuration

Add an upstream OAuth2 provider entry in your MAS config.yaml:

upstream_oauth2:
  providers:
    - id: "01JQ0FAKEG00G1E0D1CPR0V1D3"
      human_name: "Google"
      issuer: "http://localhost:5556"
      client_id: "mas-dev"
      client_secret: "mas-dev-secret"
      token_endpoint_auth_method: "client_secret_post"
      scope: "openid email profile"
      claims_imports:
        localpart:
          action: suggest
          template: "{{ user.preferred_username }}"
        displayname:
          action: suggest
          template: "{{ user.name }}"
        email:
          action: suggest
          template: "{{ user.email }}"
          set_email_verification: always

Environment variables

Variable	Default	Description
`MOCK_OIDC_ISSUER`	`http://localhost:5556`	The issuer URL
`MAS_PROVIDER_ID`	`01JQ0FAKEG00G1E0D1CPR0V1D3`	The upstream provider ID configured in MAS
`MOCK_OIDC_CLIENT_ID`	`mas-dev`	OAuth2 client ID
`MOCK_OIDC_CLIENT_SECRET`	`mas-dev-secret`	OAuth2 client secret

Running with the full dev stack

# Terminal 1: Mock Synapse (handles homeserver API calls)
python3 mocks/mock_synapse.py

# Terminal 2: Mock Google OIDC
cd mocks/mock-google-oidc && npm start

# Terminal 3: MAS
cargo run -- server -c config.yaml

Then visit http://[::]:8080/login and click "Sign in with Google".

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