demonstrate changes to get dual-build graphql-js working with jest

- use jest config setting: testEnvironment / customExportConditions
- use latest dev mode with dual build (see graphql/graphql-js#4464)
- no need for additional transformer

Author: yaacovCR

graphql-17.0.0-alpha.9.tgz

@@ -67,6 +67,7 @@
     "graphql": "16.11.0",
     "graphql-subscriptions": "3.0.0",
     "graphql-tag": "2.12.6",
+    "graphql17": "file:graphql-17.0.0-alpha.9.tgz",
     "jest": "30.0.5",
     "jest-config": "30.0.5",
     "jest-junit": "16.0.0",

package-lock.json

@@ -2,4 +2,9 @@ import baseConfig from '../../jest.config.base.js';
 
 // This needs to be "cloned" since jest depends on the object's identity in some
 // way, whether it's via mutation or something else.
-export default { ...baseConfig };
+export default {
+  ...baseConfig,
+  testEnvironmentOptions: {
+    customExportConditions: ['node', 'development'],
+  },
+};

package.json

@@ -0,0 +1,22 @@
+import { describe, it, expect } from '@jest/globals';
+import { GraphQLObjectType, isObjectType, version } from 'graphql17';
+
+describe('canary graphql v17-alpha', () => {
+  it('should work', () => {
+    expect(version).toBe('17.0.0-alpha.9'); // this version is the latest alpha on which the canary is based
+  });
+
+  it('should use development mode when set by our Jest Config', () => {
+    function getFakeGraphQLObjectType() {
+      class GraphQLObjectType {
+        get [Symbol.toStringTag]() {
+          return 'GraphQLObjectType';
+        }
+      }
+      return new GraphQLObjectType();
+    }
+
+    expect(isObjectType(new GraphQLObjectType({ name: 'SomeType', fields: {} }))).toBe(true);
+    expect(() => isObjectType(getFakeGraphQLObjectType())).toThrow();
+  });
+});