feat(modules): add OpenFGA module

Add OpenFGA testcontainer module

Signed-off-by: Petr Fedchenkov <giggsoff@gmail.com>

modules/openfga/README.rst

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+.. autoclass:: testcontainers.openfga.OpenFGAContainer
+.. title:: testcontainers.openfga.OpenFGAContainer

modules/openfga/testcontainers/openfga/__init__.py

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+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+from typing import Optional, List
+
+import requests
+from openfga_sdk import ClientConfiguration
+from openfga_sdk.credentials import Credentials, CredentialConfiguration
+from openfga_sdk.sync import OpenFgaClient
+from testcontainers.core.container import DockerContainer
+from testcontainers.core.waiting_utils import wait_container_is_ready
+
+_DEFAULT_RUN_COMMAND = "run"
+
+
+class OpenFGAContainer(DockerContainer):
+    """
+    OpenFGAContainer container.
+
+    Example:
+
+        .. doctest::
+
+            >>> from testcontainers.openfga import OpenFGAContainer
+
+            >>> with OpenFGAContainer("openfga/openfga:v1.8.4") as openfga:
+            ...     client = openfga.get_client()
+            ...     client.list_stores()
+            {'continuation_token': '', 'stores': []}
+    """
+
+    # pylint: disable=too-many-arguments
+    def __init__(
+            self,
+            image: str = "openfga/openfga:latest",
+            preshared_keys: Optional[List[str]] = None,
+            playground_port: int = 3000,
+            http_port: int = 8080,
+            grpc_port: int = 8081,
+            cmd: str = _DEFAULT_RUN_COMMAND,
+    ) -> None:
+        super().__init__(image=image)
+        self.preshared_keys = preshared_keys
+        self.playground_port = playground_port
+        self.http_port = http_port
+        self.grpc_port = grpc_port
+        self.with_exposed_ports(self.playground_port, self.http_port, self.grpc_port)
+        self.cmd = cmd
+
+    def _configure(self) -> None:
+        if self.preshared_keys:
+            self.cmd += " --authn-method=preshared"
+            self.cmd += f" --authn-preshared-keys=\"{','.join(self.preshared_keys)}\""
+        self.with_command(self.cmd)
+
+    def get_api_url(self) -> str:
+        host = self.get_container_host_ip()
+        port = self.get_exposed_port(self.http_port)
+        return f"http://{host}:{port}"
+
+    @wait_container_is_ready(requests.exceptions.ConnectionError, requests.exceptions.ReadTimeout)
+    def _readiness_probe(self) -> None:
+        self.exec(["grpc_health_probe", "-addr=0.0.0.0:8081"])  # from chart
+
+    def start(self) -> "OpenFGAContainer":
+        super().start()
+        self._readiness_probe()
+        return self
+
+    def get_preshared_keys(self) -> Optional[List[str]]:
+        return self.preshared_keys
+
+    def get_client(self) -> OpenFgaClient:
+        credentials = None
+        if preshared_keys := self.get_preshared_keys():
+            credentials = Credentials(
+                method='api_token',
+                configuration=CredentialConfiguration(
+                    api_token=preshared_keys[0],
+                ),
+            )
+        client_configuration = ClientConfiguration(api_url=self.get_api_url(), credentials=credentials)
+        return OpenFgaClient(client_configuration)

modules/openfga/tests/test_openfga.py

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+from testcontainers.openfga import OpenFGAContainer
+
+def test_openfga():
+    with OpenFGAContainer("openfga/openfga:v1.8.4") as openfga:
+        client = openfga.get_client()
+        assert client
+        assert client.list_stores()