Add diagnostics for tests.

.github/workflows/main.yml

@@ -37,6 +37,16 @@ jobs:
           python -m pip install --upgrade pip
           pip install wheel
           pip install -r requirements/${{ matrix.python-version }}.txt
+      - name: Run docker diagnostics
+        run: |
+          echo "Build minimal container for docker-in-docker diagnostics"
+          docker build -f Dockerfile.diagnostics -t testcontainers-python .
+          echo "Bare metal diagnostics"
+          python diagnostics.py
+          echo "Container diagnostics with bridge network"
+          docker run --rm -v /var/run/docker.sock:/var/run/docker.sock --network=bridge testcontainers-python python diagnostics.py
+          echo "Container diagnostics with host network"
+          docker run --rm -v /var/run/docker.sock:/var/run/docker.sock --network=host testcontainers-python python diagnostics.py
       - name: Run checks
         run: |
           flake8

Dockerfile

@@ -4,6 +4,6 @@ FROM python:${version}
 WORKDIR /workspace
 ARG version=3.8
 COPY requirements/${version}.txt requirements.txt
-COPY setup.py README.md ./
+COPY setup.py README.rst ./
 RUN pip install -r requirements.txt
 COPY . .

Dockerfile.diagnostics

@@ -0,0 +1,7 @@
+ARG version=3.8
+FROM python:${version}
+
+WORKDIR /workspace
+COPY setup.py README.rst ./
+RUN pip install -e .
+COPY . .

diagnostics.py

@@ -0,0 +1,23 @@
+import json
+from testcontainers.core import utils
+from testcontainers.core.container import DockerContainer
+
+
+result = {
+    'is_linux': utils.is_linux(),
+    'is_mac': utils.is_mac(),
+    'is_windows': utils.is_windows(),
+    'inside_container': utils.inside_container(),
+    'default_gateway_ip': utils.default_gateway_ip(),
+}
+
+with DockerContainer('alpine:latest') as container:
+    client = container.get_docker_client()
+    result.update({
+        'container_host_ip': container.get_container_host_ip(),
+        'docker_client_gateway_ip': client.gateway_ip(container._container.id),
+        'docker_client_bridge_ip': client.bridge_ip(container._container.id),
+        'docker_client_host': client.host(),
+    })
+
+print(json.dumps(result, indent=2))