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Add build instructions to contributing.md

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Lotte Steenbrink 2019-01-04 15:39:22 +01:00 committed by Martin Hořeňovský
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docs/contributing.md
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@ -37,20 +37,41 @@ as these are managed by the scripts!__
## Testing your changes
Obviously all changes to Catch's code should be tested. If you added new functionality, you should add tests covering and
showcasing it. Even if you have only made changes to Catch internals (ie you implemented some performance improvements),
you should still test your changes.
Obviously all changes to Catch's code should be tested. If you added new
functionality, you should add tests covering and showcasing it. Even if you have
only made changes to Catch internals (i.e. you implemented some performance
improvements), you should still test your changes.
This means 3 things
* Compiling Catch's SelfTest project -- code that does not compile is evidently incorrect. Obviously, you are not expected to
have access to all compilers and platforms Catch supports, Catch's CI pipeline will compile your code using supported compilers
once you open a PR.
* Running the SelfTest binary. There should be no unexpected failures on simple run.
* Running Catch's approval tests. Approval tests compare current output of the SelfTest binary in various configurations against
known good output. Catch's repository provides utility scripts `approvalTests.py` to help you with this. It needs to be passed
the SelfTest binary compiled with your changes, like so: `$ ./scripts/approvalTests.py clang-build/SelfTest`. The output should
be fairly self-explanatory.
* Compiling Catch's SelfTest project:
```
$ cd Catch2
$ cmake -Bcmake-build-debug -H. -DCATCH_BUILD_TESTING=ON
$ cd cmake-build-debug/
$ make
```
-- code that does not compile is evidently incorrect. Obviously, you are not
expected to have access to all compilers and platforms Catch supports, Catch's
CI pipeline will compile your code using supported compilers once you open a PR.
* Running the SelfTest binary:
```
$ ./cmake-build-debug/projects/SelfTest
```
There should be no unexpected failures on simple run.
*Note: on Windows, the binary is located at `cmake-build-debug\projects\Debug\SelfTest`*
* Running Catch's approval tests:
```
$ ./scripts/approvalTests.py
```
Approval tests compare current output of the SelfTest binary in various
configurations against known good output. If you've configured the SelfTest
binary with your changes to be located in any other directory than
`/cmake-build-debug/projects/SelfTest`, its path needs to be passed to the
script, like so: `$ ./scripts/approvalTests.py clang-build/SelfTest`.
The output should be fairly self-explanatory.