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69 lines
2.2 KiB
Text
69 lines
2.2 KiB
Text
How to add unit test
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====================
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Unit test brings some advantages, briefly, we can list some of them (reference
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[1](https://en.wikipedia.org/wiki/Unit_testing)):
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* Tests reduce bugs in new features;
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* Tests reduce bugs in existing features;
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* Tests are good documentation;
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* Tests reduce the cost of change;
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* Tests allow refactoring;
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With those advantages in mind, it was required to choose a framework which fits
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well with C/C++ code. Hence, it was chosen (google test)
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[https://github.com/google/googletest], because it is largely used and it is
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relatively easy learn.
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Install and configure google test (manually)
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--------------------------------------------
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In this section, you will see a brief description of how to install google
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test. However, it is strongly recommended that you take a look to the official
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repository (https://github.com/google/googletest) and refers to that if you
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have any problem to install it. Follow the steps below:
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* Install: cmake and pthread
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* Clone google test project from: https://github.com/google/googletest and
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enter in the project directory
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* Inside project directory, type:
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```
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cmake -DBUILD_SHARED_LIBS=ON .
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make
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```
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* After compilation, copy all "*.so" inside directory "googlemock" and
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"googlemock/gtest" to "/usr/lib/"
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* Done! Now you can compile your tests.
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If you have any problem, go to the official repository to find help.
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Ps.: Some distros already have googletest packed. If your distro supports it,
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you can use it instead of compile.
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Create new unit test
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--------------------
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If you want to add new unit tests for Yosys, just follow the steps below:
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* Go to directory "yosys/test/unit/"
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* In this directory you can find something similar Yosys's directory structure.
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To create your unit test file you have to follow this pattern:
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fileNameToImplementUnitTest + Test.cc. E.g.: if you want to implement the
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unit test for kernel/celledges.cc, you will need to create a file like this:
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tests/unit/kernel/celledgesTest.cc;
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* Implement your unit test
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Run unit test
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-------------
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To compile and run all unit tests, just go to yosys root directory and type:
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```
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make unit-test
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```
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If you want to remove all unit test files, type:
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```
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make clean-unit-test
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```
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