Add tests

jsignature/tests/fields.py

@@ -0,0 +1,47 @@
+import json
+import django
+from django.test import SimpleTestCase
+from django.core.exceptions import ValidationError
+
+from ..widgets import JSignatureWidget
+from ..fields import JSignatureField
+from ..forms import JSignatureField as JSignatureFormField
+
+
+class JSignatureFieldTest(SimpleTestCase):
+
+    def test_to_python(self):
+        f = JSignatureField()
+        # Empty values
+        for val in ['', [], '[]']:
+            self.assertIsNone(f.to_python(val))
+        # Correct values
+        val = [{"x":[1,2], "y":[3,4]}]
+        self.assertEquals(val, f.to_python(val))
+        val_str = '[{"x":[1,2], "y":[3,4]}]'
+        self.assertEquals(val, f.to_python(val_str))
+        # Incorrect values
+        val = 'foo'
+        self.assertRaises(ValidationError, f.to_python, val)
+
+    def test_get_prep_value(self):
+        f = JSignatureField()
+        # Empty values
+        for val in ['', [], '[]']:
+            self.assertIsNone(f.get_prep_value(val))
+        # Correct values
+        val = [{"x":[1,2], "y":[3,4]}]
+        val_prep = f.get_prep_value(val)
+        self.assertIsInstance(val_prep, basestring)
+        self.assertEquals(val, json.loads(val_prep))
+        val_str = '[{"x":[1,2], "y":[3,4]}]'
+        val_prep = f.get_prep_value(val_str)
+        self.assertIsInstance(val_prep, basestring)
+        self.assertEquals(val, json.loads(val_prep))
+        # Incorrect values
+        val = type('Foo')
+        self.assertRaises(ValidationError, f.get_prep_value, val)
+
+    def test_formfield(self):
+        f = JSignatureField()
+        self.assertTrue(issubclass(f.formfield().__class__, JSignatureFormField))