From b43b6a61ab89cae3c8fdd011c79cbe6d8716d7bb Mon Sep 17 00:00:00 2001
From: Edgar Geier <egeier@rhrk.uni-kl.de>
Date: Tue, 23 Jul 2019 15:14:06 +0200
Subject: [PATCH] Add docker uid and gid fallback tests

---
 pre_commit/languages/docker.py |  4 ++--
 tests/languages/docker_test.py | 14 ++++++++++++++
 2 files changed, 16 insertions(+), 2 deletions(-)

diff --git a/pre_commit/languages/docker.py b/pre_commit/languages/docker.py
index 8eaf6f4e..8f7c72df 100644
--- a/pre_commit/languages/docker.py
+++ b/pre_commit/languages/docker.py
@@ -75,14 +75,14 @@ def install_environment(
         os.mkdir(directory)
 
 
-def getuid():
+def getuid():  # pragma: windows no cover
     try:
         return os.getuid()
     except AttributeError:
         return FALLBACK_UID
 
 
-def getgid():
+def getgid():  # pragma: windows no cover
     try:
         return os.getgid()
     except AttributeError:
diff --git a/tests/languages/docker_test.py b/tests/languages/docker_test.py
index 9f7f55cf..43b7d1ce 100644
--- a/tests/languages/docker_test.py
+++ b/tests/languages/docker_test.py
@@ -13,3 +13,17 @@ def test_docker_is_running_process_error():
         side_effect=CalledProcessError(*(None,) * 4),
     ):
         assert docker.docker_is_running() is False
+
+
+def test_docker_fallback_uid():
+    def invalid_attribute():
+        raise AttributeError
+    with mock.patch('os.getuid', invalid_attribute):
+        assert docker.getuid() == docker.FALLBACK_UID
+
+
+def test_docker_fallback_gid():
+    def invalid_attribute():
+        raise AttributeError
+    with mock.patch('os.getgid', invalid_attribute):
+        assert docker.getgid() == docker.FALLBACK_GID