Add 'factory.debug' context manager.

1 files changed, 76 insertions, 0 deletions

diff --git a/tests/test_helpers.py b/tests/test_helpers.py
new file mode 100644
index 0000000..f5a66e5
--- /dev/null
+++ b/tests/test_helpers.py
@@ -0,0 +1,76 @@
+# -*- coding: utf-8 -*-
+# Copyright (c) 2010 Mark Sandstrom
+# Copyright (c) 2011-2013 Raphaël Barrois
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+# THE SOFTWARE.
+
+import logging
+
+from factory import helpers
+
+from .compat import io, unittest
+
+
+class DebugTest(unittest.TestCase):
+    """Tests for the 'factory.debug()' helper."""
+
+    def test_default_logger(self):
+        stream1 = io.StringIO()
+        stream2 = io.StringIO()
+
+        l = logging.getLogger('factory.test')
+        h = logging.StreamHandler(stream1)
+        h.setLevel(logging.INFO)
+        l.addHandler(h)
+
+        # Non-debug: no text gets out
+        l.debug("Test")
+        self.assertEqual('', stream1.getvalue())
+
+        with helpers.debug(stream=stream2):
+            # Debug: text goes to new stream only
+            l.debug("Test2")
+
+        self.assertEqual('', stream1.getvalue())
+        self.assertEqual("Test2\n", stream2.getvalue())
+
+    def test_alternate_logger(self):
+        stream1 = io.StringIO()
+        stream2 = io.StringIO()
+
+        l1 = logging.getLogger('factory.test')
+        l2 = logging.getLogger('factory.foo')
+        h = logging.StreamHandler(stream1)
+        h.setLevel(logging.DEBUG)
+        l2.addHandler(h)
+
+        # Non-debug: no text gets out
+        l1.debug("Test")
+        self.assertEqual('', stream1.getvalue())
+        l2.debug("Test")
+        self.assertEqual('', stream1.getvalue())
+
+        with helpers.debug('factory.test', stream=stream2):
+            # Debug: text goes to new stream only
+            l1.debug("Test2")
+            l2.debug("Test3")
+
+        self.assertEqual("", stream1.getvalue())
+        self.assertEqual("Test2\n", stream2.getvalue())
+