How do I test GraphQL resolvers with graphql-go in Go?

Testing GraphQL resolvers in Go can be effectively achieved using the graphql-go library. The following example demonstrates how to set up a simple GraphQL server and test its resolvers using the Go testing framework.


        // Import necessary packages
        import (
            "context"
            "net/http"
            "net/http/httptest"
            "testing"
            "github.com/graphql-go/graphql"
            "github.com/graphql-go/handler"
        )

        // Define your GraphQL schema
        var schema, _ = graphql.NewSchema(graphql.SchemaConfig{
            Query: graphql.NewObject(graphql.ObjectConfig{
                Name: "Query",
                Fields: graphql.Fields{
                    "hello": &graphql.Field{
                        Type: graphql.String,
                        Resolve: func(p graphql.ResolveParams) (interface{}, error) {
                            return "Hello, world!", nil
                        },
                    },
                },
            }),
        })

        // Set up a GraphQL handler
        var h = handler.New(&handler.Config{
            Schema: &schema,
            GraphiQL: true,
        })

        // Create a test server
        func testServer() *httptest.Server {
            return httptest.NewServer(h)
        }

        // Test the GraphQL resolver
        func TestHelloResolver(t *testing.T) {
            server := testServer()
            defer server.Close()

            resp, err := http.Post(server.URL, "application/json", strings.NewReader(`{"query": "{ hello }"}`))
            if err != nil {
                t.Fatalf("Failed to make request: %v", err)
            }
            defer resp.Body.Close()

            if resp.StatusCode != http.StatusOK {
                t.Fatalf("Expected status OK, got %v", resp.Status)
            }
            // Further response validation logic can go here
        }

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How do I test GraphQL resolvers with graphql-go in Go?

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How do I test GraphQL resolvers with graphql-go in Go?

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