Add mention of testing library

Author: dgarros

CHANGELOG.md

@@ -13,6 +13,36 @@ This project uses [*towncrier*](https://towncrier.readthedocs.io/) and the chang
 
 ## [1.3.0](https://github.com/opsmill/infrahub-sdk-python/tree/v1.3.0) - 2024-12-30
 
+### Added
+
+#### Testing library (**Alpha**)
+
+A new collection of tools and utilities to help with testing is available under `infrahub_sdk.testing`. 
+
+The first component available is a `TestInfrahubDockerClient`, a pytest Class designed to help creating integration tests based on Infrahub. See a simple example below to help you get started.
+
+> the installation of `infrahub-testcontainers` is required
+
+```python
+import pytest
+
+from infrahub_sdk import InfrahubClient
+from infrahub_sdk.testing.docker import TestInfrahubDockerClient
+
+class TestInfrahubNode(TestInfrahubDockerClient):
+
+    @pytest.fixture(scope="class")
+    def infrahub_version(self) -> str:
+        """Required (for now) to define the version of infrahub to use."""
+        return "1.0.10"
+
+    @pytest.fixture(scope="class")
+    async def test_create_tag(self, default_branch: str, client: InfrahubClient) -> None:
+        obj = await client.create(kind="BuiltinTag", name="Blue")
+        await obj.save()
+        assert obj.id
+```
+
 ### Changed
 
 - The Pydantic models for the schema have been split into multiple versions to align better with the different phase of the lifecycle of the schema.