TestDrivenDevelopment

Implementing a TDD library by using TDD concepts.

Desired Test Declaration

• What do we want tests to do dor us?
• What should a test look like?
• What information does a test need?
• How can we use C++ to write tests?
• How will the first test be used?

Test Results

• Reporting a single test result based on exceptions.
• Enhancing the test library to support multiple tests.
• Summarizing the test results to clearly see what failed and what passed.
• Redirecting the test result so the output can gon to any stream.

Test Results

• How build failures come first and should be seen as part of the process.
• Why you should write only enough code to pass your tests.
• How to enhance a test and get another pass.

Adding Tests to a Project

• How to detect whether a test passes or fails.
• Enhancing the testing library to support confirmations.
• Should error cases be tested, too?

Adding More Confirm Types

• Fixing the bool confirms.
• Confirming equality.
• Changing the code to fix a problem that line numbers are causing with tests failures.
• Adding more confirm types.
• Confirming string literals.
• Confirming floating-point values.
• How to write confirms.

Test Setup and Teardown

• Supporting test setup ans teardown
• Enhancing test setup ans teardown for multiple tests
• Handling errors in setup and teardown

What makes a Good Test?

• Be easy to understand - a good understanding will lead to better ideas for more tests and make tests easier to maintain.
• Be focused on a specific scenario - don't try to test everything in one giant test. Doing too much in a test will break the first guidance of understandability.
• Be repeatable - tests that use random behavior to sometimes catch problems can miss issues at the worst times.
• Be kept close to the project - make sure that test belong to the project they are testing.
• Should test what should happen instead of how it happens - if a test relies too much an internal workings, then it will be brittle and cause more work when the code is refactored.