add cpp_ignore_py_files option (enabled by default)

CHANGELOG.md

@@ -1,6 +1,8 @@
 # 1.2.0
 
 - `pytest-cpp` no longer supports Python 3.4.
+- New `cpp_ignore_py_files` option that makes the plugin ignore `*.py` files even if they
+  would otherwise match the `cpp_files` option (defaults to `True`).
 
 # 1.1.0
 

README.rst

@@ -45,27 +45,34 @@ Once installed, when py.test runs it will search and run tests
 found in executable files, detecting if the suites are
 Google or Boost tests automatically.
 
+Configuration Options
+~~~~~~~~~~~~~~~~~~~~~
+
+**cpp_files**
+
 You can configure which files are tested for suites by using the ``cpp_files``
-ini configuration:
+ini configuration option:
 
 .. code-block:: ini
 
     [pytest]
-    cpp_files=test_suite*
+    cpp_files = test_suite*
 
 By default matches ``test_*`` and ``*_test`` executable files.
 
-Additional arguments to the C++ tests can be provided with the
-``cpp_arguments`` ini configuration.
+**cpp_arguments**
 
 *New in version 1.1*.
 
+Arguments to the C++ tests can be provided with the
+``cpp_arguments`` ini configuration option.
+
 For example:
 
 .. code-block:: ini
 
     [pytest]
-    cpp_arguments=-v --log-dir=logs
+    cpp_arguments =-v --log-dir=logs
 
 You can change this option directly in the command-line using
 pytest's ``-o`` option:
@@ -74,12 +81,19 @@ pytest's ``-o`` option:
 
     $ pytest -o cpp_arguments='-v --log-dir=logs'
 
+**cpp_ignore_py_files**
+
+*New in version 1.2*.
 
-Requirements
-============
+This option defaults to ``True`` and configures the plugin to ignore ``*.py`` files that
+would otherwise match the ``cpp_files`` option.
 
-* Python 2.7+, Python 3.4+
-* pytest
+Set it to ``False`` if you have C++ executable files that end with the ``*.py`` extension.
+
+.. code-block:: ini
+
+    [pytest]
+    cpp_ignore_py_files = False
 
 Install
 =======

pytest_cpp/plugin.py

@@ -23,10 +23,13 @@ def pytest_collect_file(parent, path):
         return
 
     config = parent.config
-    masks = config.getini('cpp_files') or DEFAULT_MASKS
-
-    test_args = config.getini(_ARGUMENTS) or ()
+    masks = config.getini('cpp_files')
+    test_args = config.getini('cpp_arguments')
+    cpp_ignore_py_files = config.getini('cpp_ignore_py_files')
 
+    # don't attempt to check *.py files even if they were given as explicit arguments
+    if cpp_ignore_py_files and path.fnmatch('*.py'):
+        return
     if not parent.session.isinitpath(path):
         for pat in masks:
             if path.fnmatch(pat):
@@ -39,13 +42,18 @@ def pytest_collect_file(parent, path):
 
 
 def pytest_addoption(parser):
-    parser.addini("cpp_files", type="args",
-        default=DEFAULT_MASKS,
-        help="glob-style file patterns for C++ test module discovery")
-    parser.addini(_ARGUMENTS,
-                  type='args',
-                  default='',
-                  help='Additional arguments for test executables')
+    parser.addini('cpp_files',
+            type='args',
+            default=DEFAULT_MASKS,
+            help="glob-style file patterns for C++ test module discovery")
+    parser.addini('cpp_arguments',
+            type='args',
+            default=(),
+            help='additional arguments for test executables')
+    parser.addini('cpp_ignore_py_files',
+            type='bool',
+            default=True,
+            help='ignore *.py files that otherwise match "cpp_files" patterns')
 
 
 class CppFile(pytest.File):

tests/SConstruct

@@ -8,12 +8,16 @@ else:
     CCFLAGS = ''
     LIBS = ['pthread']
 
-env = Environment(
-    CPPPATH=os.environ.get('INCLUDE'),
-    CCFLAGS=CCFLAGS,
-    LIBPATH=os.environ.get('LIBPATH'),
-    LIBS=LIBS,
-)
+kwargs = {
+    'CPPPATH': os.environ.get('INCLUDE'),
+    'CCFLAGS': CCFLAGS,
+    'LIBPATH': os.environ.get('LIBPATH'),
+    'LIBS': LIBS,
+}
+if 'CXX' in os.environ:
+    kwargs['CXX'] = os.environ['CXX']
+
+env = Environment(**kwargs)
 genv = env.Clone(LIBS=['gtest'] + LIBS)
 
 Export('env genv')

tests/test_pytest_cpp.py

@@ -1,3 +1,4 @@
+import sys
 import pytest
 import subprocess
 from pytest_cpp import error
@@ -260,6 +261,30 @@ def test_cpp_files_option(testdir, exes):
     ])
 
 
+# skip to avoid dealing with exes.get appending extension
+@pytest.mark.skipif(sys.platform.startswith('win'), reason='This is not a problem on Windows')
+def test_cpp_ignore_py_files(testdir, exes):
+    file_name = 'cpptest_success.py'
+    exes.get('gtest', 'cpptest_success.py')
+    testdir.makeini('''
+        [pytest]
+        cpp_files = cpptest_*
+    ''')
+
+    result = testdir.runpytest('--collect-only')
+    result.stdout.fnmatch_lines('* no tests ran *')
+
+    result = testdir.runpytest('--collect-only', '-o', 'cpp_ignore_py_files=False')
+    result.stdout.fnmatch_lines("*CppFile cpptest_success.py*")
+
+    # running directly skips out machinery as well.
+    result = testdir.runpytest('--collect-only', file_name)
+    result.stdout.fnmatch_lines('*1 error in*')
+
+    result = testdir.runpytest('--collect-only', '-o', 'cpp_ignore_py_files=False', file_name)
+    result.stdout.fnmatch_lines("*CppFile cpptest_success.py*")
+
+
 def test_google_one_argument(testdir, exes):
     testdir.makeini('''
         [pytest]