1 files changed, 34 insertions, 8 deletions
diff --git a/pyfakefs/pytest_tests/pytest_plugin_test.py b/pyfakefs/pytest_tests/pytest_plugin_test.py
index 5632ff6..51f95cb 100644
--- a/pyfakefs/pytest_tests/pytest_plugin_test.py
+++ b/pyfakefs/pytest_tests/pytest_plugin_test.py
@@ -2,24 +2,26 @@
 import os
 import tempfile
 
+from pyfakefs.fake_filesystem import OSType
 from pyfakefs.fake_filesystem_unittest import Pause
+import pyfakefs.pytest_tests.io
 
 
 def test_fs_fixture(fs):
-    fs.create_file('/var/data/xx1.txt')
-    assert os.path.exists('/var/data/xx1.txt')
+    fs.create_file("/var/data/xx1.txt")
+    assert os.path.exists("/var/data/xx1.txt")
 
 
 def test_fs_fixture_alias(fake_filesystem):
-    fake_filesystem.create_file('/var/data/xx1.txt')
-    assert os.path.exists('/var/data/xx1.txt')
+    fake_filesystem.create_file("/var/data/xx1.txt")
+    assert os.path.exists("/var/data/xx1.txt")
 
 
 def test_both_fixtures(fs, fake_filesystem):
-    fake_filesystem.create_file('/var/data/xx1.txt')
-    fs.create_file('/var/data/xx2.txt')
-    assert os.path.exists('/var/data/xx1.txt')
-    assert os.path.exists('/var/data/xx2.txt')
+    fake_filesystem.create_file("/var/data/xx1.txt")
+    fs.create_file("/var/data/xx2.txt")
+    assert os.path.exists("/var/data/xx1.txt")
+    assert os.path.exists("/var/data/xx2.txt")
     assert fs == fake_filesystem
 
 
@@ -50,3 +52,27 @@ def test_pause_resume_contextmanager(fs):
         assert os.path.exists(real_temp_file.name)
     assert not os.path.exists(real_temp_file.name)
     assert os.path.exists(fake_temp_file.name)
+
+
+def test_use_own_io_module(fs):
+    filepath = "foo.txt"
+    with open(filepath, "w") as f:
+        f.write("bar")
+
+    stream = pyfakefs.pytest_tests.io.InputStream(filepath)
+    assert stream.read() == "bar"
+
+
+def test_switch_to_windows(fs):
+    fs.os = OSType.WINDOWS
+    assert os.path.exists(tempfile.gettempdir())
+
+
+def test_switch_to_linux(fs):
+    fs.os = OSType.LINUX
+    assert os.path.exists(tempfile.gettempdir())
+
+
+def test_switch_to_macos(fs):
+    fs.os = OSType.MACOS
+    assert os.path.exists(tempfile.gettempdir())