1 files changed, 40 insertions, 0 deletions
diff --git a/ctrack/users/tests/test_forms.py b/ctrack/users/tests/test_forms.py
new file mode 100644
index 0000000..11ef251
--- /dev/null
+++ b/ctrack/users/tests/test_forms.py
@@ -0,0 +1,40 @@
+import pytest
+
+from ctrack.users.forms import UserCreationForm
+from ctrack.users.tests.factories import UserFactory
+
+pytestmark = pytest.mark.django_db
+
+
+class TestUserCreationForm:
+    def test_clean_username(self):
+        # A user with proto_user params does not exist yet.
+        proto_user = UserFactory.build()
+
+        form = UserCreationForm(
+            {
+                "username": proto_user.username,
+                "password1": proto_user._password,
+                "password2": proto_user._password,
+            }
+        )
+
+        assert form.is_valid()
+        assert form.clean_username() == proto_user.username
+
+        # Creating a user.
+        form.save()
+
+        # The user with proto_user params already exists,
+        # hence cannot be created.
+        form = UserCreationForm(
+            {
+                "username": proto_user.username,
+                "password1": proto_user._password,
+                "password2": proto_user._password,
+            }
+        )
+
+        assert not form.is_valid()
+        assert len(form.errors) == 1
+        assert "username" in form.errors