Added support for CIBW_TEST_EXTRAS to allow extras_require to be used to install test dependencies

README.md

@@ -225,6 +225,7 @@ All being well, you should get wheels delivered to you in a few minutes.
 |   | `CIBW_MANYLINUX1_I686_IMAGE` | Specify an alternative manylinux1 i686 docker image |
 | **Tests** | `CIBW_TEST_COMMAND` | Execute a shell command to test all built wheels |
 |   | `CIBW_TEST_REQUIRES` | Install Python dependencies before running the tests |
+|   | `CIBW_TEST_EXTRAS` | Install Python dependencies before running the tests using ``extras_require``|
 
 A more detailed description of the options, the allowed values, and some examples can be found in the [Options](#options) section.
 
@@ -412,6 +413,25 @@ Example: `nose==1.3.7 moto==0.4.31`
 Platform-specific variants also available:
 `CIBW_TEST_REQUIRES_MACOS` | `CIBW_TEST_REQUIRES_WINDOWS` | `CIBW_TEST_REQUIRES_LINUX`
 
+***
+
+| Environment variable: `CIBW_TEST_EXTRAS`
+| ---
+
+Optional.
+
+Comma-separated list of
+[extras_require](https://setuptools.readthedocs.io/en/latest/setuptools.html#declaring-extras-optional-features-with-their-own-dependencies)
+options that should be included when installing the wheel prior to running the
+tests. This can be used to avoid having to redefine test dependencies in
+``CIBW_TEST_REQUIRES`` if they are already defined in ``setup.py`` or
+``setup.cfg``.
+
+Example: `test,qt` (will cause the wheel to be installed with ``pip install <wheel_file>[test,qt])
+
+
+Platform-specific variants also available:
+`CIBW_TEST_EXTRAS_MACOS` | `CIBW_TEST_EXTRAS_WINDOWS` | `CIBW_TEST_EXTRAS_LINUX`
 
 ### Example YML syntax
 

cibuildwheel/__main__.py

@@ -91,12 +91,16 @@ def main():
     output_dir = args.output_dir
     test_command = get_option_from_environment('CIBW_TEST_COMMAND', platform=platform)
     test_requires = get_option_from_environment('CIBW_TEST_REQUIRES', platform=platform, default='').split()
+    test_extras = get_option_from_environment('CIBW_TEST_EXTRAS', platform=platform, default='')
     project_dir = args.project_dir
     before_build = get_option_from_environment('CIBW_BEFORE_BUILD', platform=platform)
     build_verbosity = get_option_from_environment('CIBW_BUILD_VERBOSITY', platform=platform, default='')
     build_config, skip_config = os.environ.get('CIBW_BUILD', '*'), os.environ.get('CIBW_SKIP', '')
     environment_config = get_option_from_environment('CIBW_ENVIRONMENT', platform=platform, default='')
 
+    if test_extras:
+        test_extras = '[{0}]'.format(test_extras)
+
     try:
         build_verbosity = min(3, max(-3, int(build_verbosity)))
     except ValueError:
@@ -129,6 +133,7 @@ def main():
         output_dir=output_dir,
         test_command=test_command,
         test_requires=test_requires,
+        test_extras=test_extras,
         before_build=before_build,
         build_verbosity=build_verbosity,
         build_selector=build_selector,

cibuildwheel/linux.py

@@ -30,7 +30,7 @@ def get_python_configurations(build_selector):
     return [c for c in python_configurations if build_selector(c.identifier)]
 
 
-def build(project_dir, output_dir, test_command, test_requires, before_build, build_verbosity, build_selector, environment, manylinux1_images):
+def build(project_dir, output_dir, test_command, test_requires, test_extras, before_build, build_verbosity, build_selector, environment, manylinux1_images):
     try:
         subprocess.check_call(['docker', '--version'])
     except:
@@ -86,7 +86,7 @@ def build(project_dir, output_dir, test_command, test_requires, before_build, bu
                 delocated_wheel=(/tmp/delocated_wheel/*.whl)
 
                 # Install the wheel we just built
-                "$PYBIN/pip" install "$delocated_wheel"
+                "$PYBIN/pip" install "$delocated_wheel"{test_extras}
 
                 # Install any requirements to run the tests
                 if [ ! -z "{test_requires}" ]; then

cibuildwheel/macos.py

@@ -24,7 +24,7 @@ def get_python_configurations(build_selector):
     return [c for c in python_configurations if build_selector(c.identifier)]
 
 
-def build(project_dir, output_dir, test_command, test_requires, before_build, build_verbosity, build_selector, environment):
+def build(project_dir, output_dir, test_command, test_requires, test_extras, before_build, build_verbosity, build_selector, environment):
     python_configurations = get_python_configurations(build_selector)
     get_pip_url = 'https://bootstrap.pypa.io/get-pip.py'
     get_pip_script = '/tmp/get-pip.py'
@@ -121,7 +121,7 @@ def build(project_dir, output_dir, test_command, test_requires, before_build, bu
         delocated_wheel = glob('/tmp/delocated_wheel/*.whl')[0]
 
         # install the wheel
-        call(['pip', 'install', delocated_wheel], env=env)
+        call(['pip', 'install', delocated_wheel + test_extras], env=env)
 
         # test the wheel
         if test_requires:

cibuildwheel/windows.py

@@ -56,7 +56,7 @@ def get_python_configurations(build_selector):
     return [c for c in python_configurations if build_selector(c.identifier)]
 
 
-def build(project_dir, output_dir, test_command, test_requires, before_build, build_verbosity, build_selector, environment):
+def build(project_dir, output_dir, test_command, test_requires, test_extras, before_build, build_verbosity, build_selector, environment):
     if IS_RUNNING_ON_AZURE:
         def shell(args, env=None, cwd=None):
             print('+ ' + ' '.join(args))
@@ -122,7 +122,7 @@ def build(project_dir, output_dir, test_command, test_requires, before_build, bu
         built_wheel = glob(built_wheel_dir+'/*.whl')[0]
 
         # install the wheel
-        shell(['pip', 'install', built_wheel], env=env)
+        shell(['pip', 'install', built_wheel + test_extras], env=env)
 
         # test the wheel
         if test_requires: