add test for first query

spec/graphql/queries/show_event_spec.rb

@@ -0,0 +1,29 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+RSpec.describe 'Events' do
+
+  it "queries and returns all events" do
+    e = create(:event, name: 'FirstEvent')
+    e2 = create(:event, name: 'AnotherEvent')
+
+    query_string = <<-GRAPHQL
+    query
+     {
+       events {
+          id
+          duration
+          name
+        }
+      }
+      GRAPHQL
+
+    result = WebsiteOneBackendApiSchema.execute(query_string)["data"]["events"]
+
+    names = result.collect {|x| x["name"]}
+
+    assert names.detect { |e| e == 'FirstEvent' }
+    assert names.detect { |e| e == 'AnotherEvent' }
+  end
+end