Add target class init test

samples/sample_tap_sqlite/__init__.py

@@ -60,6 +60,7 @@ class SQLiteTap(SQLTap):
             DB_PATH_CONFIG,
             th.StringType,
             description="The path to your SQLite database file(s).",
+            required=True,
         )
     ).to_dict()
 

samples/sample_target_sqlite/__init__.py

@@ -66,6 +66,7 @@ class SQLiteTarget(SQLTarget):
             DB_PATH_CONFIG,
             th.StringType,
             description="The path to your SQLite database file(s).",
+            required=True,
         )
     ).to_dict()
 

tests/core/test_target_class.py

@@ -0,0 +1,50 @@
+from __future__ import annotations
+
+import json
+from contextlib import nullcontext
+
+import pytest
+from click.testing import CliRunner
+
+from samples.sample_target_sqlite import SQLiteTarget
+from singer_sdk.exceptions import ConfigValidationError
+
+
+@pytest.mark.parametrize(
+    "config_dict,expectation,errors",
+    [
+        pytest.param(
+            {},
+            pytest.raises(ConfigValidationError, match="Config validation failed"),
+            ["'path_to_db' is a required property"],
+            id="missing_path_to_db",
+        ),
+        pytest.param(
+            {"path_to_db": "sqlite://test.db"},
+            nullcontext(),
+            [],
+            id="valid_config",
+        ),
+    ],
+)
+def test_config_errors(config_dict: dict, expectation, errors: list[str]):
+    with expectation as exc:
+        SQLiteTarget(config_dict, validate_config=True)
+
+    if isinstance(exc, pytest.ExceptionInfo):
+        assert exc.value.errors == errors
+
+
+def test_cli(tmp_path):
+    """Test the CLI."""
+    runner = CliRunner(mix_stderr=False)
+    result = runner.invoke(SQLiteTarget.cli, ["--help"])
+    assert result.exit_code == 0
+    assert "Show this message and exit." in result.output
+
+    config_path = tmp_path / "config.json"
+    config_path.write_text(json.dumps({}))
+    result = runner.invoke(SQLiteTarget.cli, ["--config", str(config_path)])
+    assert result.exit_code == 1
+    assert result.stdout == ""
+    assert "'path_to_db' is a required property" in result.stderr