Starting from the PAMPLEJUCE template, here is an example on how to implement some unit testing of a lowpass filter. Both time domain and frequency domain tests were implemented. The filter class is located in /source and test cases can be found in tests/FilterTests.cpp

assuming you already know JUCE and how to use its Cake integration:

• read CATCH2 documentation
• implement your own JUCE class and put it in /source
• think about some meaningful tests and implement them in tests, note that you will probably need to write your own custom matchers

cmake -B build
cmake --build ./build --parallel

./build/Tests

Based on the PAMPLEJUCE template, code takes also some inspiration from here.