# Fixing Bugs and Adding Features

This page describes how to build, fix and improve the source code.

## Making Changes

Pull requests are welcome at github project page.

For more info see Creating a pull request from a fork.

Try to keep the code style consistent with the existing code.

## Build the Debug Version

    mkdir build
    cd build
    cmake -DCMAKE_BUILD_TYPE=Debug -DWITH_TESTS=ON ..
    make

## Run Tests

You can run automated tests if the application is built either in debug mode, with CMake flag `-DWITH_TESTS=ON`.

Run the tests with following command.

    copyq tests

This command will execute all test cases in new special CopyQ session so that user configuration, tabs and items are not modified. It’s better to close any other CopyQ session before running tests since they can affect test results.

While running tests there must be no keyboard and mouse interaction. Preferably you can execute the tests in separate virtual environment. On Linux you can run the tests on virtual X11 server with `xvfb-run`.

    xvfb-run sh -c 'openbox & sleep 1; copyq tests'

Test invocation examples:

- Print help for tests: `copyq tests --help`

- Run specific tests: `copyq tests commandHelp commandVersion`

- Run specific tests for a plugin: `copyq tests 'PLUGINS:pinned' isPinned`

- Run tests only for specific plugins: `copyq tests 'PLUGINS:pinned|tags'`

- List tests: `copyq tests -functions`

- List tests for a plugin: `copyq tests PLUGINS:tags -functions`

- Less verbose tests: `copyq tests -silent`

- Slower GUI tests: `COPYQ_TESTS_KEYS_WAIT=1000 COPYQ_TESTS_KEY_DELAY=50 copyq tests editItems`