shields/core/base-service/graphql.spec.js

'use strict'

const { expect } = require('chai')
const gql = require('graphql-tag')
const { print } = require('graphql/language/printer')
const { mergeQueries } = require('./graphql')

require('../register-chai-plugins.spec')

describe('mergeQueries function', function() {
  it('merges valid gql queries', function() {
    expect(
      print(
        mergeQueries(
          gql`
            query($param: String!) {
              foo(param: $param) {
                bar
              }
            }
          `
        )
      )
    ).to.equalIgnoreSpaces(
      'query ($param: String!) { foo(param: $param) { bar } }'
    )

    expect(
      print(
        mergeQueries(
          gql`
            query($param: String!) {
              foo(param: $param) {
                bar
              }
            }
          `,
          gql`
            query {
              baz
            }
          `
        )
      )
    ).to.equalIgnoreSpaces(
      'query ($param: String!) { foo(param: $param) { bar } baz }'
    )

    expect(
      print(
        mergeQueries(
          gql`
            query {
              foo
            }
          `,
          gql`
            query {
              bar
            }
          `,
          gql`
            query {
              baz
            }
          `
        )
      )
    ).to.equalIgnoreSpaces('{ foo bar baz }')

    expect(
      print(
        mergeQueries(
          gql`
            {
              foo
            }
          `,
          gql`
            {
              bar
            }
          `
        )
      )
    ).to.equalIgnoreSpaces('{ foo bar }')
  })

  it('throws an error when passed invalid params', function() {
    expect(() => mergeQueries('', '')).to.throw(Error)
    expect(() => mergeQueries(undefined, 17, true)).to.throw(Error)
    expect(() => mergeQueries(gql``, gql`foo`)).to.throw(Error)
  })
})