Enabling end-to-end testing of applications across networks

A system for test an application across a network, comprising:

• an application server connected to the network and including an application to be tested;
• a response simulator connected to the network;
• and
• a storage device having stored therein a test module associated with an identifier, wherein
• the test module storage is connected to both the application server and the response simulator,
• the test module includes a test message and an expected response to the test message,
• the application server is configured to
• send the test message, over the network, to the response simulator,
• compare the received expected response from the response simulator to the expected response from the test module,
• the test simulator is configured to
• identify the identifier associated with the received test message,
• retrieve, from the test module and based upon the identifier, the expected response, and
• send the expected response, over the network, to the application server.