Real-World Unit Test Example

Framework-Less Unit Tests

A unit test is a test that covers a single component or small piece of functionality in an application. In a framework-less unit test, there is no predefined structure or set of rules to follow. This means that the test can be written in any language and does not require a specific testing framework....

Minimal Unit Test

A minimal unit test is a test that exercises the smallest possible unit of code in your application. This usually means testing a single function, but it could also mean testing a small group of closely related functions....

Unit Testing Best Practices

There are many different ways to write unit tests, but there are some common best practices that can help make your unit tests more effective....

Stubs, Fakes, and Mocks

Stubs, fakes, and mocks are all ways of creating test doubles. Test doubles are dummy objects that stand in for real objects in order to test a particular piece of code....

What is Embedded C/C++ Unit Testing?

Embedded C/C++ unit testing is a process of validating the functionality of individual units of code by creating test cases. These test cases exercise the functionality of the code and check for expected results. The purpose of embedded C/C++ unit testing is to find and fix defects early in the development cycle, before they can cause problems in the final product. There are many different approaches to embedded C/C++ unit testing, but all share some basic features. First, a test driver is written to provide a controlled environment for running the tests. This driver calls the functions under test and checks the results against expected values. Second, a test suite is created containing all of the tests that need to be run. This suite is then executed by the test driver....

How to Get Started with Embedded C/C++ Unit Testing?

If you’re new to unit testing, the process of getting started can seem daunting. But with a few tips and tricks, you can be up and running in no time. Here are a few things to keep in mind when getting started with embedded C/C++ unit testing:...

Real-World Unit Test Example

A real-world unit test example would be testing a function that calculates the average of a set of numbers. The unit test would check that the function returns the expected result when given different sets of numbers. A real-world unit test might involve testing a method that calculates the monthly payment on a loan. The test would provide various loan amounts, interest rates, and loan terms, and compare the results of the method to the expected results. Let’s say you are a developer and you are developing an e-commerce website. There are many things that need to be built, but one of the first things you need to build is a calculation engine that calculates the total cost of a user’s order, including shipping and taxes....

Setting Up CppUTest

CppUTest is a C/C++-based unit testing framework for software projects. It is designed to provide a great deal of flexibility and power in a relatively small package. CppUTest is released under the Apache License, version 2.0. The basic idea behind CppUTest is to write tests in C++ code using a set of simple macros. These macros generate code that interacts with your production code to exercise different paths and verify expected results. Your test code is then linked with a CppUTest library to produce an executable test program. You can then run this test program to exercise the tests you’ve written and see the results. CppUTest can generate output in multiple formats, including JUnit XML for use with continuous integration servers. CppUTest also supports mocking of C/C++ code using the Google Mock framework. This allows you to write tests for code that has dependencies on other modules, without needing to link to or include the production code for those modules....

Common Issues with C/C++ Unit Tests

Difficulty in mocking dependencies: In C/C++, it can be difficult to mock out dependencies when writing unit tests. This can lead to tests that are not as isolated as they should be, and can make it difficult to test edge cases. Lack of a standard unit testing framework: There is no standard unit testing framework for C/C++. This can make it difficult to find and use the right tools for your project. Lack of support for test-driven development: C/C++ does not have great support for test-driven development. This can make it difficult to write tests that are comprehensive and that cover all the corner cases. Memory leaks: If the code being tested is not properly freeing memory, this can lead to memory leaks. Resource leaks: If the code being tested is not properly releasing resources, this can lead to resource leaks. Deadlocks: If the code being tested is not properly handling concurrency, this can lead to deadlocks....

Benefits of Embedded C/C++ Unit Testing

Early bug detection: Embedded C/C++ unit testing can help you catch bugs early and prevent them from becoming expensive problems later on.  Ensure code performs as intended: By writing and running tests for your embedded C/C++ code, you can ensure that your code is doing what it’s supposed to do and that it’s robust enough to handle real-world conditions.  Improve the quality of code: Embedded C/C++ unit testing can help you improve the quality of your code by making it easier to find and fix coding errors.  Increase confidence in code: By using a well-designed unit test suite, you can also increase your confidence in the code, which can lead to fewer unexpected problems when the code is released into the wild....