vimalrajselvam / test-graphql-java

Easy Graphql Testing in Java

Test GraphQL Java

This library let's you to convert the GraphQL file to a simple string which can be used as a request payload using any HTTP client library.

I've written this library for the simple GraphQL API Testing. There is a graphql-java library which let's you to implement GraphQL server in Java. My main goal is not to introduce Spring Boot just for the sake of testing the GraphQL API. I wanted to keep it simple!

To use this library, you can download from Maven:

<dependency>
    <groupId>com.vimalselvam</groupId>
    <artifactId>test-graphql-java</artifactId>
    <version>1.0.0</version>
</dependency>

I don't use Gradle, but it should be simple to add this as a gradle dependency.

Getting Started

There are two ways to load the GraphQL file.

• using InputStream:

  InputStream iStream = getClass().getResourceAsStream("/graphql/pokemon.graphql");

  Here the pokemon.graphql file in under src/test/resources/graphql/pokemon.graphql.

• using File:

  File file = new File("src/test/resources/graphql/pokemon.graphql");

Once you read the file, just pass it to GraphqlTemplate class to parse as follows:

String graphqlPayload = GraphqlTemplate.parseGraphql(file, variables);

Here the variables is the com.fasterxml.jackson.databind.node.ObjectNode. If no variables, you just pass null.

To build the variables, you can do:

ObjectNode variables = new ObjectMapper().createObjectNode();
variables.put("name", "Pikachu");

Then you can use any HTTP Client and pass the graphqlPayload string as a body.

A sample test can be found here