opps forgot files

wagtail/wagtailcore/tests/test_validators.py

@@ -0,0 +1,14 @@
+from django.test import TestCase
+from django.core.exceptions import ValidationError
+
+from wagtail.wagtailcore.validators import validate_not_whitespace
+
+
+class TestValidators(TestCase):
+
+    def test_not_whitespace(self):
+        validate_not_whitespace('bar')
+
+        for test_value in (' ', '\t', '\r', '\n', '\r\n'):
+            with self.assertRaises(ValidationError):
+                validate_not_whitespace(test_value)

wagtail/wagtailcore/validators.py

@@ -0,0 +1,15 @@
+import re
+
+from django.core.exceptions import ValidationError
+from django.utils.translation import ugettext as _
+
+WHITESPACE_RE = re.compile(r'^\s+$')
+
+
+def validate_not_whitespace(value):
+    """
+    Validate that a value isn't all whitespace, for example in title and
+    seo_title
+    """
+    if value and WHITESPACE_RE.match(value):
+        raise ValidationError(_('Value cannot be entirely whitespace characters'))