The only Apollo Client mocking tool you need

Test, mock, intercept and modify Apollo Client's operations — in both browser and unit tests!

Read the Medium article about Laika: Mock GraphQL Subscriptions with Laika — the only Apollo Client mocking tool you’ll need

Features

• mock responses in either unit tests or browser tests (think Playwright, Puppeteer or Cypress)
  • simulate error state
  • simulate loading state
  • simulate subscriptions (pushing data to the client at any given point)
• it can work in production code without affecting the size of the bundle (laika is lazily loaded)
• captures the variables that were called for a given operation for assertions
• log all the data passing through from the network (or whatever Links are after this one)
• record your user story
• generate fixtures and working mock code for use in your tests
• modify backend responses before they reach your components (e.g. to fuzz-test unexpected behavior)

Usage

• Peer support: @apollo/client >=3.2.5 <5, graphql ^15 || ^16, and rxjs ^7.3.0 for Apollo Client 4.x projects
• How to install