The last header is the most interesting one. #include "mock_rectangle.h" // A mock header
#UNITY CMOCK TUTORIAL CODE#
#include "shape_container.h" // The header for the code we are testing #include "unity.h" // The testing framework In a new file called test_shape_container, we add our imports. To test the shape_conductor_init function, we’ll need to mock out that call to rectangle_init. Now that we have testable code, we want to write a test to make sure it works as we expect. Void shape_container_init(uint16_t r_length, uint16_t r_width)īool shape_container_calc_rect(uint16_t r_length, uint16_t r_width) Return (rect.r_length + rect.r_width) * 2 Void rectangle_init(uint16_t length, uint16_t width) The second is a shape_container class that creates a rectangle and operates on it. The first is a rectangle class that takes in height and width values and a few basic functions. For this example, I created two simple classes. In order to write tests, we need testable code. Then generate a new Ceedling project with ceedling new cmock_example Make testable code
#UNITY CMOCK TUTORIAL INSTALL#
To get started, we’re first going to install Ceedling using the command gem install ceedling Let’s get ready to watch it work! Let’s Spin Up a Project! Install Ceedling
The power of CMock really shines when using it. Callbacks allow you to specify more complex mocked functionality.Ignores allow you to tell the code to ignore values from expectations, if they’re not relevant to the test.Returns allow you to specify what data the mocked function should return to the tested code.Expectations allow you to specify functions that you expect to be called with specific values by the function under test.It not only generates them, but it gives you additional functionality around those calls. It works within the Unity testing framework, and it is automatically included in any projects that use the Ceedling build management tool.ĬMock autogenerates all functions defined in your code’s header files. CMock OverviewĬMock is an automated stub and mock generation framework made by a community of C developers, including Atom Greg Williams.
#UNITY CMOCK TUTORIAL HOW TO#
So here is my quick tutorial on how to get started with CMock. But though there’s a lot of helpful documentation on CMock, I found little advice on getting to know it in general. I tried to find some simple tutorials to get a better understanding of this library. I recently started on a large project that utilizes the powerful CMock mocking library in its testing.
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