[maykinmedia/objects-api#481] Add validate_no_empty + tests

src/objecttypes/token/migrations/0009_tokenauth_identifier_alter_tokenauth_token.py

@@ -59,7 +59,10 @@ class Migration(migrations.Migration):
             field=models.CharField(
                 max_length=40,
                 unique=True,
-                validators=[objecttypes.token.validators.validate_no_whitespace],
+                validators=[
+                    objecttypes.token.validators.validate_no_empty,
+                    objecttypes.token.validators.validate_no_whitespace,
+                ],
                 verbose_name="token",
             ),
         ),

src/objecttypes/token/models.py

@@ -3,7 +3,7 @@
 from django.db import models
 from django.utils.translation import gettext_lazy as _
 
-from objecttypes.token.validators import validate_no_whitespace
+from objecttypes.token.validators import validate_no_empty, validate_no_whitespace
 
 
 class TokenAuth(models.Model):
@@ -16,7 +16,7 @@ class TokenAuth(models.Model):
         _("token"),
         max_length=40,
         unique=True,
-        validators=[validate_no_whitespace],
+        validators=[validate_no_empty, validate_no_whitespace],
     )
 
     contact_person = models.CharField(

src/objecttypes/token/tests/test_validators.py

@@ -1,7 +1,20 @@
 from django.core.exceptions import ValidationError
 from django.test import SimpleTestCase
 
-from objecttypes.token.validators import validate_no_whitespace
+from objecttypes.token.validators import validate_no_empty, validate_no_whitespace
+
+
+class NoEmptyValidatorTestCase(SimpleTestCase):
+    def test_valid(self):
+        self.assertIsNone(validate_no_empty("test123"))
+
+    def test_invalid_string(self):
+        with self.assertRaises(ValidationError):
+            validate_no_empty("")
+
+    def test_invalid_none(self):
+        with self.assertRaises(ValidationError):
+            validate_no_empty(None)
 
 
 class WhiteSpaceValidatorTestCase(SimpleTestCase):

src/objecttypes/token/validators.py

@@ -13,3 +13,8 @@ def validate_no_whitespace(value: str) -> None:
             code="all-whitespace",
             message=_("Tokens cannot contain whitespace-like characters"),
         )
+
+
+def validate_no_empty(value: str) -> None:
+    if not value:
+        raise ValidationError(code="invalid", message=_("Blank values are not allowed"))