test: add tes case for 282 issue

closes 282

Author: nodkz

src/__tests__/github_issues/282-test.ts

@@ -0,0 +1,81 @@
+/* eslint-disable no-param-reassign */
+
+import { schemaComposer, graphql } from 'graphql-compose';
+import { composeWithMongoose } from '../../index';
+import { mongoose } from '../../__mocks__/mongooseCommon';
+
+const EventSchema = new mongoose.Schema(
+  {
+    timestamp: { type: Date, required: true },
+    level: { type: String, required: true },
+    message: { type: String, required: true },
+    meta: {
+      topic: { type: String },
+      subjects: { type: [String] },
+      variables: { type: Map, of: String },
+    },
+  },
+  { collection: 'events' }
+);
+
+const EventModel = mongoose.model('Event', EventSchema);
+const EventTC = composeWithMongoose(EventModel);
+EventTC.getResolvers().forEach((resolver) => {
+  const newResolver = resolver.addFilterArg({
+    name: 'subjects',
+    filterTypeNameFallback: 'FilterEventInput',
+    type: '[String]',
+    query: (query, value) => {
+      query['meta.subjects'] = { $elemMatch: { $in: value } };
+    },
+  });
+
+  EventTC.setResolver(resolver.name, newResolver);
+});
+schemaComposer.Query.addFields({
+  eventMany: EventTC.getResolver('findMany'),
+});
+const schema = schemaComposer.buildSchema();
+
+beforeAll(async () => {
+  await EventModel.base.createConnection();
+  await EventModel.create({
+    timestamp: new Date(),
+    level: 'status',
+    message: 'event1',
+    meta: {
+      topic: 'topic',
+      subjects: ['metaValue'],
+    },
+  });
+  await EventModel.create({
+    timestamp: new Date(),
+    level: 'status',
+    message: 'event2',
+    meta: {
+      topic: 'topic',
+      subjects: ['notMetaValue'],
+    },
+  });
+});
+afterAll(() => EventModel.base.disconnect());
+
+describe('issue #282 - Filter nested array by string', () => {
+  it('correct request', async () => {
+    expect(
+      await graphql.graphql(
+        schema,
+        `query {
+          eventMany(filter: { subjects: ["notMetaValue"] }) {
+            message
+            meta {
+              subjects
+            }
+          }
+        }`
+      )
+    ).toEqual({
+      data: { eventMany: [{ message: 'event2', meta: { subjects: ['notMetaValue'] } }] },
+    });
+  });
+});