Add new tests for get_author_display_name in utils.py

tests/test_utils.py

@@ -0,0 +1,46 @@
+import pytest
+from djpress.utils import get_author_display_name
+from django.contrib.auth.models import User
+
+
+# create a parameterized fixture for a test user with first name, last name, and username
+@pytest.fixture(
+    params=[
+        ("Sam", "Brown", "sambrown"),
+        ("Sam", "", "sambrown"),
+        ("", "Brown", "sambrown"),
+        ("", "", "sambrown"),
+    ]
+)
+def test_user(request):
+    first_name, last_name, username = request.param
+    user = User.objects.create_user(
+        username=username,
+        first_name=first_name,
+        last_name=last_name,
+        password="testpass",
+    )
+
+    return user
+
+
+# Test the get_author_display_name function with the test_user fixture
+@pytest.mark.django_db
+def test_get_author_display_name(test_user):
+    display_name = get_author_display_name(test_user)
+    first_name = test_user.first_name
+    last_name = test_user.last_name
+    user_name = test_user.username
+
+    # Assert that the display name is the first name and last name separated by a space
+    if first_name and last_name:
+        assert display_name == f"{first_name} {last_name}"
+
+    if first_name and not last_name:
+        assert display_name == first_name
+
+    if not first_name and last_name:
+        assert display_name == user_name
+
+    if not first_name and not last_name:
+        assert display_name == user_name