Overview

The Log function is used to create a test stream of input and output terminal screens for an application or system. Once a test stream has been logged, it can be run and rerun to test changes to the underlying program.

For example, suppose you modify an application and want to check for changes and errors in the application that may have been unintentionally introduced. You can log a test stream on the original program and run that test stream on the new version. CA Verify for VTAM will compare the logged output screens with the new output screens and flag any differences, making it easy to spot and correct errors. Alternatively, if you install new disk drives or a new release of CICS, you can run your logged test streams to make sure all your applications perform as expected.

You can log a test stream from one or more terminals. Logging a test stream from multiple terminals provides the tools you need for stress testing. You can also run such a test stream under varying conditions to gauge the impact on your system.

As you log test streams, you'll be creating a library of benchmark tests you can use over and over again to test application and system changes. For this reason, you'll want to make sure the test streams you create are as complete as possible.

Note: Test streams can be browsed and edited. For example, you can change a test stream so you can test different input, or you can merge test streams to create a new test case.