Add Node.resolveType tests

src/types/node.js

@@ -1,6 +1,8 @@
 import { nodeDefinitions, fromGlobalId } from 'graphql-relay'
 import { toDashed } from './helpers'
 
+const debug = require('debug')('graphbrainz:types/node')
+
 const { nodeInterface, nodeField } = nodeDefinitions(
   (globalID, { loaders }) => {
     const { type, id } = fromGlobalId(globalID)
@@ -11,7 +13,7 @@ const { nodeInterface, nodeField } = nodeDefinitions(
     try {
       return require(`./${obj._type}`).default
     } catch (err) {
-      console.error(err)
+      debug(`Failed to load type: ${obj._type}`)
       return null
     }
   }

test/types/node.js

@@ -0,0 +1,11 @@
+import test from 'ava'
+import Node from '../../src/types/node'
+import ReleaseGroup from '../../src/types/release-group'
+
+test('loads types from their module', t => {
+  t.is(Node.resolveType({ _type: 'release-group' }), ReleaseGroup)
+})
+
+test('returns null for unknown types', t => {
+  t.is(Node.resolveType({ _type: 'foo' }), null)
+})