React Apollo Hooks & Testing: useQuery with refetch and MockedProvider example

React Apollo Hooks & Testing: useQuery with refetch and MockedProvider example

In this example, we'll see how to use the new useQuery hook available from the apollo react-hooks package to send GraphQL queries and receive response with fetched data from APIs.

In this example, we'll see how to use the new useQuery hook available from the apollo react-hooks package to send GraphQL queries and receive response with fetched data from APIs.

We'll also see how to test a React component that makes use of Apollo React hooks using MockedProvider available from @apollo/react-testing

The Apollo client provides two ways to send GraphQL queries:

  • Using the query method,
  • Using the useQuery React hook

The useQuery React hook allows you to pass a GraphQL query and will take care of fetching the data. automatically.

Please note that the useQuery hook is not a built-in React hook such as useState or useEffect hooks but a custom hook provided by the @apollo/react-hooks package

We assume that you already have a React application ready. Let's also assume it's called react-app.

Navigate inside the project's folder and install the following libraries:

react graphql

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