Enhanced test document

docs/layers/tests.md

@@ -1,3 +1,11 @@
 # Tests
 
-This layer is responsible to test each layer of application.
+This layer is responsible to test each layer of application. Each test file name follow `[file-name].test.jsx` pattern for naming. We use [expect](https://github.com/mjackson/expect) to write assertion for each test case. We use [Karma](https://karma-runner.github.io/1.0/index.html) to run our tests. We use [Mocha](https://mochajs.org/) that tests run serially, allowing for flexible and accurate reporting, while mapping uncaught exceptions to the correct test cases.
+
+## Test Actions
+
+## Test Reducers
+
+## Test Components
+
+## Test API