Add tests for form field validator

sc/social/like/tests/test_fallback_image.py

@@ -0,0 +1,56 @@
+# -*- coding: utf-8 -*-
+from sc.social.like.testing import INTEGRATION_TESTING
+from sc.social.like.tests.utils import get_file_b64encoded
+from sc.social.like.utils import validate_og_fallback_image
+from zope.interface import Invalid
+
+import unittest
+
+
+class OGFallbackImageValidatorTestCase(unittest.TestCase):
+
+    layer = INTEGRATION_TESTING
+
+    def test_validate_og_fallback_image_no_image(self):
+        self.assertTrue(validate_og_fallback_image(None))
+
+    def test_validate_og_fallback_image_valid(self):
+        image = get_file_b64encoded('imgtest_1024x768.png')
+        self.assertTrue(validate_og_fallback_image(image))
+
+    def test_validate_og_fallback_image_invalid_mime_type(self):
+        image = get_file_b64encoded('julia_set_ice.tiff')
+        with self.assertRaises(Invalid):
+            validate_og_fallback_image(image)
+
+    # FIXME: we need to find out how to easily resize the image
+    @unittest.expectedFailure
+    def test_validate_og_fallback_image_invalid_size(self):
+        image = get_file_b64encoded('imgtest_1024x768.png')
+        with self.assertRaises(Invalid):
+            validate_og_fallback_image(image)
+
+    def test_validate_og_fallback_image_invalid_dimensions(self):
+        image = get_file_b64encoded('julia_set_ice.png')
+        with self.assertRaises(Invalid):
+            validate_og_fallback_image(image)
+
+    def test_validate_og_fallback_image_invalid_aspect_ratio(self):
+        image = get_file_b64encoded('imgtest_768x768.jpg')
+        with self.assertRaises(Invalid):
+            validate_og_fallback_image(image)
+
+
+def load_tests(loader, tests, pattern):
+    from sc.social.like.testing import HAS_DEXTERITY
+
+    test_cases = []
+    if HAS_DEXTERITY:
+        # load validation tests on Dexterity-based content types only
+        test_cases.append(OGFallbackImageValidatorTestCase)
+
+    suite = unittest.TestSuite()
+    for test_class in test_cases:
+        tests = loader.loadTestsFromTestCase(test_class)
+        suite.addTests(tests)
+    return suite