1 files changed, 63 insertions, 0 deletions
diff --git a/share/extensions/tests/test_inkex.py b/share/extensions/tests/test_inkex.py
new file mode 100644
index 0000000..1f550dd
--- /dev/null
+++ b/share/extensions/tests/test_inkex.py
@@ -0,0 +1,63 @@
+#
+# Copyright (C) 2020 Martin Owens
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA.
+#
+"""
+Test API collisions and other inkex portions that don't fit elsewhere.
+"""
+
+from unittest import TestCase as BaseCase
+
+import inkex
+import inkex.paths
+import inkex.elements
+from inkex.utils import PY3
+
+class ProtectiveGlobals(dict):
+    """Python 3.3 and above globals dictionary"""
+    def __setitem__(self, name, value):
+        # This only works because setitem is called during construction It
+        # does not work for getitem and that's why the python docs discourage
+        # the use of an inherited dictionary class for exec globals.
+        if name in self and value is not self[name]:
+            assert value is self[name], (
+                "While importing {} the API name `{}` was re-defined:"
+                "\n\t1. {}"
+                "\n\t2. {}"
+            ).format(self['__name__'], name, repr(value), repr(self[name]))
+        super(ProtectiveGlobals, self).__setitem__(name, value)
+
+class TestModuleCollisions(BaseCase):
+    """Test imports to make sure the API is clean"""
+    def assertNoCollisions(self, module): # pylint: disable=invalid-name
+        """Make sure there are no API collisions in the give module on import"""
+        if not PY3:
+            self.skipTest("API testing python 3.3 and above only.")
+
+        with open(module.__file__, 'r') as fhl:
+            # name and package are esential to the exec pretending to
+            # be an actual module during import (and not a script)
+            exec(fhl.read(), ProtectiveGlobals({ # pylint: disable=exec-used
+                '__name__': module.__name__,
+                '__package__': module.__package__}))
+
+    def test_inkex(self):
+        """Test inkex API have no collisions"""
+        self.assertNoCollisions(inkex)
+
+    def test_inkex_elements(self):
+        """Test elements API have no collisions"""
+        self.assertNoCollisions(inkex.elements)