test: Add unit test for get_cloud_function_name (#2018)

Author: jialuoo

tests/unit/functions/test_remote_function_utils.py

@@ -40,6 +40,42 @@ def test_get_remote_function_locations(
     assert cf_region == expected_cf_region
 
 
+@pytest.mark.parametrize(
+    "func_hash, session_id, uniq_suffix, expected_name",
+    [
+        (
+            "hash123",
+            None,
+            None,
+            "bigframes-hash123",
+        ),
+        (
+            "hash456",
+            "session789",
+            None,
+            "bigframes-session789-hash456",
+        ),
+        (
+            "hash123",
+            None,
+            "suffixABC",
+            "bigframes-hash123-suffixABC",
+        ),
+        (
+            "hash456",
+            "session789",
+            "suffixDEF",
+            "bigframes-session789-hash456-suffixDEF",
+        ),
+    ],
+)
+def test_get_cloud_function_name(func_hash, session_id, uniq_suffix, expected_name):
+    """Tests the construction of the cloud function name from its parts."""
+    result = _utils.get_cloud_function_name(func_hash, session_id, uniq_suffix)
+
+    assert result == expected_name
+
+
 def test_get_updated_package_requirements_no_extra_package():
     """Tests with no extra package."""
     result = _utils.get_updated_package_requirements(capture_references=False)