feat: implement formal pytest plugin for test extras

.gitignore

@@ -15,3 +15,4 @@ dist
 .idea
 .vscode
 **/__pycache__
+unit_tests/resources/sample_connector/secrets/config.json

airbyte_cdk/test/README.md

@@ -0,0 +1,74 @@
+# Airbyte CDK Test Extras
+
+This module provides test utilities and fixtures for Airbyte connectors, including pre-built test suites that connector developers can easily use to run a full suite of tests.
+
+## Usage
+
+### Option 1: Using the built-in pytest plugin (recommended)
+
+The CDK includes a pytest plugin that automatically discovers connectors and their tests, eliminating the need for scaffolding files. To use it:
+
+1. Install the Airbyte CDK with test extras:
+
+```bash
+pip install airbyte-cdk[tests]
+```
+
+2. Run pytest in your connector directory with auto-discovery enabled:
+
+```bash
+pytest --auto-discover
+```
+
+If your connector is in a different directory, you can specify it:
+
+```bash
+pytest --auto-discover --connector-dir /path/to/connector
+```
+
+The plugin will:
+- Automatically discover your connector type (source or destination)
+- Find your connector class
+- Load test scenarios from your acceptance test config file
+- Run the appropriate tests
+
+### Option 2: Creating a minimal test scaffold (traditional approach)
+
+If you prefer more control over test discovery and execution, you can create a minimal test scaffold:
+
+1. Create a test file (e.g., `test_connector.py`):
+
+```python
+from airbyte_cdk.test.declarative.test_suites.source_base import SourceTestSuiteBase
+from your_connector.source import YourConnector
+
+class TestYourConnector(SourceTestSuiteBase):
+    connector = YourConnector
+
+    @classmethod
+    def create_connector(cls, scenario):
+        return cls.connector()
+```
+
+2. Run pytest with the connector option:
+
+```bash
+pytest --run-connector
+```
+
+## Acceptance Test Config
+
+The test suites will automatically look for and use an acceptance test config file named either:
+- `connector-acceptance-tests.yml`
+- `acceptance-test-config.yml`
+
+The config file is used to:
+- Discover test scenarios
+- Configure test behavior
+- Set expectations for test results
+
+## Available Test Suites
+
+- `ConnectorTestSuiteBase`: Base test suite for all connectors
+- `SourceTestSuiteBase`: Test suite for source connectors
+- `DestinationTestSuiteBase`: Test suite for destination connectors