Validating a JSON Object against GraphQL Type

[rawkode]

Is it possible to validate a JSON document against a GraphQL Output Type?

I found these docs: https://graphql.org/graphql-js/utilities/

I am able to load the schema and get the types. I can't work out how to validate a JSON doc against one of those types though.

I've tried astFromValue and isValidJSValue; both without success.

Please help :)

This is where I am thus far:

jest.disableAutomock();

const fs = require("fs");
const graphql = require("graphql");
const yaml = require("js-yaml");

test("adds 1 + 2 to equal 3", () => {
  const teamMemberSchema = fs.readFileSync(
    "../../schemas/graphql/team/member.graphql",
    "utf8"
  );

  const schema = graphql.buildSchema(teamMemberSchema);

  const members = yaml.safeLoadAll(
    fs.readFileSync("../../examples/team/member.yaml", "utf8")
  );

  members.map(member => {
    const result = ???;
    console.log(result);
  });

  expect(1 + 2).toBe(3);
});

[IvanGoncharov]

@rawkode There is no specialized function for astFromValue and isValidJSValue are intended to work with Input types only.
The resolution of output types heavily depends on resolvers so output data is validated only during query execution.

What you can do is to use graphql:

const testSchema = new GraphQLSchema({
  query: new GraphQLObjectType({
    name: 'Query',
    fields: {
      testField: {
        type: new GraphQLList(schema.getType('SomeType')),
      }
    }
  });
})

const source = `
  {
     testField {
       someField
       # All other subfields
     }
  }
`;

const result = graphqlSync({ schema: testSchema, source, rootValue: members });
expect(result.errors).to.equal(undefined);
expect(result.data.testField).to.deep.equal(members);

Disclaimer: I didn't run this code just wrote it from the top of my head.

[IvanGoncharov]

Also, it's partly overlaps with #563