This pull request introduces a series of updates to improve test maintainability and functionality in the fjage project. The key changes include the introduction of a constant for default delay values in tests, the addition of new test cases for agent-related functionalities, and the registration of a new service in test agents.

Test Improvements:

• Added a DEFAULT_CLOSE_DELAY constant to replace hardcoded delay values in the test file gateways/js/test/spec/fjage.spec.js, improving consistency and maintainability. [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14]

New Test Cases:

• Added test cases to verify agent-related functionalities, including retrieving all agents, checking for the existence of specific agents, and getting agents for specific services.

Agent Enhancements:

• Registered a new TEST service in the EchoServerAgent and ParamServerAgent classes to support service-based queries in tests. [1] [2]

These updates enhance the test framework's flexibility, maintainability, and functionality, especially for service-based agent interactions.