1 files changed, 26 insertions, 0 deletions
diff --git a/tests/extensions_test.py b/tests/extensions_test.py
new file mode 100644
index 0000000..44f16a8
--- /dev/null
+++ b/tests/extensions_test.py
@@ -0,0 +1,26 @@
+# -*- coding: utf-8 -*-
+from __future__ import absolute_import
+from __future__ import unicode_literals
+
+import pytest
+
+from identify import extensions
+
+
+@pytest.mark.parametrize('extension', extensions.EXTENSIONS)
+def test_extensions_have_binary_or_text(extension):
+    tags = extensions.EXTENSIONS[extension]
+    assert len({'text', 'binary'} & tags) == 1, tags
+
+
+@pytest.mark.parametrize('extension', extensions.EXTENSIONS_NEED_BINARY_CHECK)
+def test_need_binary_check_do_not_specify_text_binary(extension):
+    tags = extensions.EXTENSIONS_NEED_BINARY_CHECK[extension]
+    assert len({'text', 'binary'} & tags) == 0, tags
+
+
+def test_mutually_exclusive_check_types():
+    assert not (
+        set(extensions.EXTENSIONS) &
+        set(extensions.EXTENSIONS_NEED_BINARY_CHECK)
+    )