In Test Explorer, select the test method you want to associate and choose Associate to Test Case. In the dialog that opens, type the test case identifier and choose Add Association, then choose Save. The dialog shows a list of test cases currently associated with the selected test method.
To write the test script, script writers should put themselves in the place of the user to decide which user paths to test. They should be creative to be able to predict all of the different paths that users would take. Properly creating test scripts saves time during the testing process and ensures a higher quality product.