UnitTest: forgot to add file test_image.py

kivy/tests/test_image.py

@@ -0,0 +1,16 @@
+import unittest
+
+
+class ImageTestCase(unittest.TestCase):
+
+    def setUp(self):
+        from kivy.core.image import Image
+        self.cls = Image
+        self.root = Image('test_button.png')
+
+    def test_keep_data(self):
+        root = self.root
+        self.assertEqual(root._image._data[0].data, None)
+        i1 = self.cls('test_button.png', keep_data = True)
+        if not i1._image._data[0].data:
+            self.fail('Image has no data even with keep_data = True')