feat: DockerContainer initializer to accept its private members as kwargs (#809)

Re submitting what is the end result of the iterations in
#238
submitted originally by @vikhal.

Simply enabling the initializer of `DockerContainer` to accept its
private members as kwargs.

---------

Co-authored-by: David Ankin <daveankin@gmail.com>

Author: rhoban13

core/README.rst

@@ -18,6 +18,8 @@ Testcontainers Core
 
 .. autoclass:: testcontainers.core.generic.DbContainer
 
+.. autoclass:: testcontainers.core.network.Network
+
 .. raw:: html
 
     <hr>

core/testcontainers/core/container.py

@@ -28,6 +28,20 @@ class DockerContainer:
     """
     Basic container object to spin up Docker instances.
 
+    Args:
+        image: The name of the image to start.
+        docker_client_kw: Dictionary with arguments that will be passed to the
+            docker.DockerClient init.
+        command: Optional execution command for the container.
+        name: Optional name for the container.
+        ports: Ports to be exposed by the container. The port number will be
+            automatically assigned on the host, use
+            :code:`get_exposed_port(PORT)` method to get the port number on the host.
+        volumes: Volumes to mount into the container. Each entry should be a tuple with
+            three values: host path, container path and. mode (default 'ro').
+        network: Optional network to connect the container to.
+        network_aliases: Optional list of aliases for the container in the network.
+
     .. doctest::
 
         >>> from testcontainers.core.container import DockerContainer
@@ -41,18 +55,40 @@ def __init__(
         self,
         image: str,
         docker_client_kw: Optional[dict] = None,
+        command: Optional[str] = None,
+        env: Optional[dict[str, str]] = None,
+        name: Optional[str] = None,
+        ports: Optional[list[int]] = None,
+        volumes: Optional[list[tuple[str, str, str]]] = None,
+        network: Optional[Network] = None,
+        network_aliases: Optional[list[str]] = None,
         **kwargs,
     ) -> None:
-        self.env = {}
+        self.env = env or {}
+
         self.ports = {}
+        if ports:
+            self.with_exposed_ports(*ports)
+
         self.volumes = {}
+        if volumes:
+            for vol in volumes:
+                self.with_volume_mapping(*vol)
+
         self.image = image
         self._docker = DockerClient(**(docker_client_kw or {}))
         self._container = None
-        self._command = None
-        self._name = None
+        self._command = command
+        self._name = name
+
         self._network: Optional[Network] = None
+        if network is not None:
+            self.with_network(network)
+
         self._network_aliases: Optional[list[str]] = None
+        if network_aliases:
+            self.with_network_aliases(*network_aliases)
+
         self._kwargs = kwargs
 
     def with_env(self, key: str, value: str) -> Self:

core/tests/compose_fixtures/port_multiple/compose.yaml

@@ -6,6 +6,7 @@ services:
       - '81'
       - '82'
       - target: 80
+        published: "5000-5999"
         host_ip: 127.0.0.1
         protocol: tcp
     command:
@@ -18,6 +19,7 @@ services:
     init: true
     ports:
       - target: 80
+        published: "5000-5999"
         host_ip: 127.0.0.1
         protocol: tcp
     command:

core/tests/test_container.py

@@ -75,3 +75,24 @@ def test_get_exposed_port_original(container: DockerContainer, monkeypatch: pyte
     monkeypatch.setattr(client, "get_connection_mode", lambda: ConnectionMode.bridge_ip)
 
     assert container.get_exposed_port(8080) == 8080
+
+
+@pytest.mark.parametrize(
+    "init_attr,init_value,class_attr,stored_value",
+    [
+        ("command", "ps", "_command", "ps"),
+        ("env", {"e1": "v1"}, "env", {"e1": "v1"}),
+        ("name", "foo-bar", "_name", "foo-bar"),
+        ("ports", [22, 80], "ports", {22: None, 80: None}),
+        (
+            "volumes",
+            [("/tmp", "/tmp2", "ro")],
+            "volumes",
+            {"/tmp": {"bind": "/tmp2", "mode": "ro"}},
+        ),
+    ],
+)
+def test_attribute(init_attr, init_value, class_attr, stored_value):
+    """Test that the attributes set through the __init__ function are properly stored."""
+    with DockerContainer("ubuntu", **{init_attr: init_value}) as container:
+        assert getattr(container, class_attr) == stored_value

core/tests/test_utils.py

@@ -33,6 +33,7 @@ def test_is_windows(monkeypatch: MonkeyPatch) -> None:
 
 
 def test_is_arm(monkeypatch: MonkeyPatch) -> None:
+    monkeypatch.setattr("platform.machine", lambda: "x86_64")
     assert not utils.is_arm()
     monkeypatch.setattr("platform.machine", lambda: "arm64")
     assert utils.is_arm()