Add testcode for ajax_spider

Author: hahwul

spec/v2apis/ajax_spider_spec.rb

@@ -0,0 +1,10 @@
+# frozen_string_literal: true
+
+require './lib/zapv2'
+
+describe ZAPv2 do
+  it 'initialize' do
+    instance = ZAPv2.new
+    expect(instance.ajax_spider).not_to be nil
+  end
+end