1 files changed, 100 insertions, 0 deletions
diff --git a/tests/utils.py b/tests/utils.py
new file mode 100644
index 0000000..823e82b
--- /dev/null
+++ b/tests/utils.py
@@ -0,0 +1,100 @@
+# -*- 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 datetime
+
+from .compat import mock
+
+
+class MultiModulePatcher(object):
+    """An abstract context processor for patching multiple modules."""
+
+    replaced_symbol = None
+    replaced_symbol_module = None
+    module_imported_as = ''
+
+    def __init__(self, *target_modules, **kwargs):
+        super(MultiModulePatcher, self).__init__(**kwargs)
+        if not self.module_imported_as:
+            self.module_imported_as = replaced_symbol.__module__.__name__
+        self.patchers = [self._build_patcher(mod) for mod in target_modules]
+
+    def _check_module(self, target_module):
+        if not self.replaced_symbol_module:
+            # No check to perform
+            return
+
+        replaced_import = getattr(target_module, self.module_imported_as)
+        assert replaced_import is self.replaced_symbol_module, (
+            "Cannot patch import %s.%s (%r != %r)" % (
+                target_module.__name__, self.module_imported_as,
+                replaced_import, self.replaced_symbol_module))
+
+    def _build_patcher(self, target_module):
+        """Build a mock patcher for the target module."""
+        self._check_module(target_module)
+
+        return mock.patch.object(
+            getattr(target_module, self.module_imported_as),
+            self.replaced_symbol.__name__,
+            mock.Mock(wraps=self.replaced_symbol),
+        )
+
+    def setup_mocked_symbol(self, mocked_symbol):
+        """Setup a mocked symbol for later use."""
+        pass
+
+    def __enter__(self):
+        for patcher in self.patchers:
+            mocked_symbol = patcher.start()
+            self.setup_mocked_symbol(mocked_symbol)
+
+    def __exit__(self, exc_type=None, exc_val=None, exc_tb=None):
+        for patcher in self.patchers:
+            patcher.stop()
+
+
+class mocked_date_today(MultiModulePatcher):
+    """A context processor changing the value of date.today()."""
+    replaced_symbol = datetime.date
+    replaced_symbol_module = datetime
+    module_imported_as = 'datetime'
+
+    def __init__(self, target_date, *target_modules, **kwargs):
+        self.target_date = target_date
+        super(mocked_date_today, self).__init__(*target_modules, **kwargs)
+
+    def setup_mocked_symbol(self, mocked_date):
+        mocked_date.today.return_value = self.target_date
+
+
+class mocked_datetime_now(MultiModulePatcher):
+    replaced_symbol = datetime.datetime
+    replaced_symbol_module = datetime
+    module_imported_as = 'datetime'
+
+    def __init__(self, target_dt, *target_modules, **kwargs):
+        self.target_dt = target_dt
+        super(mocked_datetime_now, self).__init__(*target_modules, **kwargs)
+
+    def setup_mocked_symbol(self, mocked_datetime):
+        mocked_datetime.now.return_value = self.target_dt