From 2696a7eb5b762fd9149ebf68ef433259e230ee0a Mon Sep 17 00:00:00 2001
From: Moriz Wahl <moriz.wahl@gmx.de>
Date: Thu, 7 Oct 2021 00:11:23 +0200
Subject: [PATCH] feat: Setup Unit Tests for Resolvers

---
 backend/package.json                          |  1 +
 .../resolver/CommunityResolver.test.ts        | 39 +++++++++++++++++++
 .../src/graphql/resolver/CommunityResolver.ts |  7 +---
 backend/src/test-server.ts                    | 29 ++++++++++++++
 backend/yarn.lock                             |  7 ++++
 5 files changed, 78 insertions(+), 5 deletions(-)
 create mode 100644 backend/src/graphql/resolver/CommunityResolver.test.ts
 create mode 100644 backend/src/test-server.ts

diff --git a/backend/package.json b/backend/package.json
index 4719595bb..01952bf69 100644
--- a/backend/package.json
+++ b/backend/package.json
@@ -18,6 +18,7 @@
   "dependencies": {
     "@types/jest": "^27.0.2",
     "apollo-server-express": "^2.25.2",
+    "apollo-server-testing": "^2.25.2",
     "axios": "^0.21.1",
     "class-validator": "^0.13.1",
     "cors": "^2.8.5",
diff --git a/backend/src/graphql/resolver/CommunityResolver.test.ts b/backend/src/graphql/resolver/CommunityResolver.test.ts
new file mode 100644
index 000000000..fa295c82f
--- /dev/null
+++ b/backend/src/graphql/resolver/CommunityResolver.test.ts
@@ -0,0 +1,39 @@
+import { createTestClient } from 'apollo-server-testing'
+import createTestServer from '../../test-server'
+
+let query: any
+
+beforeAll(async () => {
+  const apollo = createTestServer()
+
+  query = createTestClient(await apollo).query
+})
+  
+describe('CommunityResolver', () => {
+
+  const getCommunityInfoQuery = `
+    query {
+      getCommunityInfo() {
+        name
+        description
+        url
+        registerUrl
+      }
+    }
+  `
+
+  describe('getCommunityInfo', () => {
+    it('returns the default values', async () => {
+      await expect(query({ query: getCommunityInfoQuery })).resolves.toMatchObject({
+        data: {
+          getCommunityInfo: {
+            name: 'Gradido Entwicklung',
+            description: 'Die lokale Entwicklungsumgebung von Gradido.',
+            url: 'http://localhost/vue/',
+            registerUrl: 'http://localhost/vue/register',
+          },
+        },
+      })
+    })
+  })
+})
diff --git a/backend/src/graphql/resolver/CommunityResolver.ts b/backend/src/graphql/resolver/CommunityResolver.ts
index 563c73d24..836c61b66 100644
--- a/backend/src/graphql/resolver/CommunityResolver.ts
+++ b/backend/src/graphql/resolver/CommunityResolver.ts
@@ -19,9 +19,7 @@ export class CommunityResolver {
 
   @Query(() => [Community])
   async communities(): Promise<Community[]> {
-    const communities: Community[] = []
-
-    communities.push(
+    return [
       new Community({
         id: 1,
         name: 'Gradido Entwicklung',
@@ -43,7 +41,6 @@ export class CommunityResolver {
         url: 'https://gradido.net',
         registerUrl: 'https://gdd1.gradido.com/vue/register-community',
       }),
-    )
-    return communities
+    ]
   }
 }
diff --git a/backend/src/test-server.ts b/backend/src/test-server.ts
new file mode 100644
index 000000000..ab6edd0df
--- /dev/null
+++ b/backend/src/test-server.ts
@@ -0,0 +1,29 @@
+import { ApolloServer } from 'apollo-server-express'
+import express from 'express'
+import cors from './server/cors'
+import context from './server/context'
+import plugins from './server/plugins'
+import CONFIG from './config'
+
+// graphql
+import schema from './graphql/schema'
+
+const createTestServer = async () => {
+  // Express Server
+  const server = express()
+
+  // cors
+  server.use(cors)
+  
+  // Apollo Server
+  const apollo = new ApolloServer({
+    schema: await schema(),
+    playground: CONFIG.GRAPHIQL,
+    context,
+    plugins,
+  })
+  apollo.applyMiddleware({ app: server })
+  return apollo
+}
+
+export default createTestServer
diff --git a/backend/yarn.lock b/backend/yarn.lock
index 714823fe9..7b3310a02 100644
--- a/backend/yarn.lock
+++ b/backend/yarn.lock
@@ -1328,6 +1328,13 @@ apollo-server-plugin-base@^0.13.0:
   dependencies:
     apollo-server-types "^0.9.0"
 
+apollo-server-testing@^2.25.2:
+  version "2.25.2"
+  resolved "https://registry.yarnpkg.com/apollo-server-testing/-/apollo-server-testing-2.25.2.tgz#0043e98b1a03720352e94b409215fb4782ae2e50"
+  integrity sha512-HjQV9wPbi/ZqpRbyyhNwCbaDnfjDM0hTRec5TOoOjurEZ/vh4hTPHwGkDZx3kbcWowhGxe2qoHM6KANSB/SxuA==
+  dependencies:
+    apollo-server-core "^2.25.2"
+
 apollo-server-types@^0.9.0:
   version "0.9.0"
   resolved "https://registry.npmjs.org/apollo-server-types/-/apollo-server-types-0.9.0.tgz"