Table of Contents

Preface

Part 1: Testing MVP

1

Desired Test Declaration

Technical requirements

What do we want tests to do for 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?

Summary

2

Test Results

Technical requirements

Reporting a single test result

Enhancing the test declaration to support multiple tests

Summarizing the results

Redirecting the output results

Summary

3

The TDD Process

Technical requirements

Build failures come first

Do only what is needed to pass

Enhancing a test and getting another pass

Summary

4

Adding Tests to a Project

Technical requirements

How to detect whether a test passes or fails

Enhancing the testing library to support assertions

Should error cases be tested, too?

Summary

5

Adding More Confirm Types

Technical requirements

Fixing the bool confirms

Confirming equality

Decoupling test failures from line numbers

Adding more confirm types

Confirming string literals

Confirming floating point values

How to write confirms

Summary

6

Explore Improvements Early

Technical requirements

Getting line numbers without macros

Exploring lambdas for tests

Summary

7

Test Setup and Teardown

Technical requirements

Supporting test setup and teardown

Enhancing test setup and teardown for multiple tests

Handling errors in setup and teardown

Summary

8

What Makes a Good Test?

Technical requirements

Making tests easy to understand

Keeping tests focused on specific scenarios

Use random behavior only in this way

Only test your project

Test what should happen instead of how

Summary

Part 2: Using TDD to Create a Logging Library

9

Using Tests

Technical requirements

Why build a logging library?

How will TDD help build a logging library?

What would the ideal logging library look like?

Starting a project using TDD

Logging and confirming the first message

Adding timestamps

Constructing log messages with streams

Summary

10

The TDD Process in Depth

Technical requirements

Finding gaps in the testing

Adding log levels

Adding default tag values

Exploring filtering options

Adding new tag types

Refactoring the tag design with TDD

Designing tests to filter log messages

Controlling what gets logged

Enhancing filtering for relative matches

When is testing too much?

How intrusive should tests be?

Where do integration or system tests go in TDD?

What about other types of tests?

Summary

11

Managing Dependencies

Technical requirements

Designing with dependencies

Adding multiple logging outputs

Summary

Part 3: Extending the TDD Library to Support the Growing Needs of the Logging Library

12

Creating Better Test Confirmations

Technical requirements

The problem with the current confirmations

Simplifying string confirmations

Enhancing the test library to support Hamcrest matchers

Adding more Hamcrest types

Summary

13

How to Test Floating-Point and Custom Values

Technical requirements

More precise floating-point comparisons

Adding floating-point Hamcrest matchers

Writing custom Hamcrest matchers

Summary

14

How to Test Services

Technical requirements

Service testing challenges

What can be tested in a service?

Introducing the SimpleService project

Summary

15

How to Test With Multiple Threads

Technical requirements

Using multiple threads in tests

Making the logging library thread-safe

The need to justify multiple threads

Changing the service return type

Making multiple service calls

How to test multiple threads without sleep

Fixing one last problem detected with logging

Summary

Index

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