`@shopify/cypress-graphql`

Cypress commands for intercepting and testing graphql endpoints.

Installation

Install this package w/ npm or yarn

npm install --dev @shopify/cypress-graphql
yarn add --dev @shopify/cypress-graphql

Then in your cypress/support/index files, import the entire package to register these commands.

import '@shopify/cypress-graphql';

Typescript types are automatically included, so no further action is required.

Usage

`cy.interceptGql`

This command sets up spies and stubs for a graphql endpoint, similar to cypress route intercepts. This registers a top-level route alias called GraphQL. Optionally, but definitely encouraged is providing an array of known operations, which will then be registered as sub-operations with their own aliases.

Intercept any request

cy.interceptGql('**/graphql')                         // register route intercepts
cy.get('button[type="submit"]').click()               // make the UI send a request
cy.wait('@GraphQL').its('status').should('eq', 200)   // test the response

Intercept a specific operation

cy.interceptGql('**/graphql', ['UserQuery'])          // register route intercepts
cy.get('button[type="submit"]').click()               // make the UI send a request
cy.wait('@UserQuery').its('status').should('eq', 200) // test the response

Stub a specific operation

cy.interceptGql('**/graphql', [
  ['UserQuery', { statusCode: 400, body: { data: null, errors: ['fake err']  } }]
])                                                    // provide a fake error
cy.get('button[type="submit"]').click()               // make the UI send a request
cy.wait('@UserQuery').its('status').should('eq', 400) // test the response