More morph tests

Tests/test_imagemorph.py

@@ -218,6 +218,61 @@ class MorphTests(PillowTestCase):
         self.assertRaises(Exception, lambda: mop.match(im))
         self.assertRaises(Exception, lambda: mop.get_on_pixels(im))
 
+    def test_add_patterns(self):
+        # Arrange
+        lb = ImageMorph.LutBuilder(op_name='corner')
+        self.assertEqual(lb.patterns, ['1:(... ... ...)->0',
+                                       '4:(00. 01. ...)->1'])
+        new_patterns = ['M:(00. 01. ...)->1',
+                        'N:(00. 01. ...)->1']
+
+        # Act
+        lb.add_patterns(new_patterns)
+
+        # Assert
+        self.assertEqual(
+            lb.patterns,
+            ['1:(... ... ...)->0',
+             '4:(00. 01. ...)->1',
+             'M:(00. 01. ...)->1',
+             'N:(00. 01. ...)->1'])
+
+    def test_unknown_pattern(self):
+        self.assertRaises(
+            Exception,
+            lambda: ImageMorph.LutBuilder(op_name='unknown'))
+
+    def test_pattern_syntax_error(self):
+        # Arrange
+        lb = ImageMorph.LutBuilder(op_name='corner')
+        new_patterns = ['a pattern with a syntax error']
+        lb.add_patterns(new_patterns)
+
+        # Act / Assert
+        self.assertRaises(
+            Exception,
+            lambda: lb.build_lut())
+
+    def test_load_invalid_mrl(self):
+        # Arrange
+        invalid_mrl = 'Tests/images/hopper.png'
+        mop = ImageMorph.MorphOp()
+
+        # Act / Assert
+        self.assertRaises(Exception, lambda: mop.load_lut(invalid_mrl))
+
+    def test_set_lut(self):
+        # Arrange
+        lb = ImageMorph.LutBuilder(op_name='corner')
+        lut = lb.build_lut()
+        mop = ImageMorph.MorphOp()
+
+        # Act
+        mop.set_lut(lut)
+
+        # Assert
+        self.assertEqual(mop.lut, lut)
+
 
 if __name__ == '__main__':
     unittest.main()