Improve test code (#7121)

spec/ParseAPI.spec.js

@@ -24,31 +24,14 @@ const headers = {
 };
 
 describe_only_db('mongo')('miscellaneous', () => {
-  it('test rest_create_app', function (done) {
-    let appId;
-    Parse._request('POST', 'rest_create_app')
-      .then(res => {
-        expect(typeof res.application_id).toEqual('string');
-        expect(res.master_key).toEqual('master');
-        appId = res.application_id;
-        Parse.initialize(appId, 'unused');
-        const obj = new Parse.Object('TestObject');
-        obj.set('foo', 'bar');
-        return obj.save();
-      })
-      .then(() => {
-        const config = Config.get(appId);
-        return config.database.adapter.find('TestObject', { fields: {} }, {}, {});
-      })
-      .then(results => {
-        expect(results.length).toEqual(1);
-        expect(results[0]['foo']).toEqual('bar');
-        done();
-      })
-      .catch(error => {
-        fail(JSON.stringify(error));
-        done();
-      });
+  it('db contains document after successful save', async () => {
+    const obj = new Parse.Object('TestObject');
+    obj.set('foo', 'bar');
+    await obj.save();
+    const config = Config.get(defaultConfiguration.appId);
+    const results = await config.database.adapter.find('TestObject', { fields: {} }, {}, {});
+    expect(results.length).toEqual(1);
+    expect(results[0]['foo']).toEqual('bar');
   });
 });