Add unit tests capturing the expectation

1 files changed, 10 insertions, 0 deletions

diff --git a/distutils/sysconfig.py b/distutils/sysconfig.py
index 4b722043..3dd8185f 100644
--- a/distutils/sysconfig.py
+++ b/distutils/sysconfig.py
@@ -164,6 +164,16 @@ def _get_python_inc_from_config(plat_specific, spec_prefix):
     the host
     platform Python installation, while the current Python
     executable is from the build platform installation.
+
+    >>> monkeypatch = getfixture('monkeypatch')
+    >>> gpifc = _get_python_inc_from_config
+    >>> monkeypatch.setitem(gpifc.__globals__, 'get_config_var', str.lower)
+    >>> gpifc(False, '/usr/bin/')
+    >>> gpifc(False, '')
+    >>> gpifc(False, None)
+    'includepy'
+    >>> gpifc(True, None)
+    'confincludepy'
     """
     if spec_prefix is None:
         return get_config_var('CONF' * plat_specific + 'INCLUDEPY')