chore: add unit test

Author: ChristoGrab

unit_tests/source_declarative_manifest/test_source_declarative_remote_manifest.py

@@ -3,10 +3,13 @@
 #
 
 import pytest
+from pathlib import Path
+from unittest.mock import mock_open, patch
 
 from airbyte_cdk.cli.source_declarative_manifest._run import (
     create_declarative_source,
     handle_command,
+    _parse_manifest_from_args,
 )
 from airbyte_cdk.sources.declarative.manifest_declarative_source import ManifestDeclarativeSource
 
@@ -27,3 +30,22 @@ def test_given_no_injected_declarative_manifest_then_raise_value_error(invalid_r
 def test_given_injected_declarative_manifest_then_return_declarative_manifest(valid_remote_config):
     source = create_declarative_source(["check", "--config", str(valid_remote_config)])
     assert isinstance(source, ManifestDeclarativeSource)
+
+
+def test_parse_manifest_from_args(valid_remote_config: Path) -> None:
+    mock_manifest_content = '{"test_manifest": "fancy_declarative_components"}'
+    with patch("builtins.open", mock_open(read_data=mock_manifest_content)):
+        # Test with manifest path
+        result = _parse_manifest_from_args(
+            [
+                "check",
+                "--config",
+                str(valid_remote_config),
+                "--manifest-path",
+                "manifest.yaml",
+            ]
+        )
+        assert result == {"test_manifest": "fancy_declarative_components"}
+
+        # Test without manifest path
+        assert _parse_manifest_from_args(["check", "--config", str(valid_remote_config)]) is None