check_container.py
```python
from python_on_whales import docker
class Container:
    def __init__(self, name):
        self.name = name
    def is_running(self):
        container_found = self.search_container()
        if container_found:
            for container in self.get_container_state():
                if container.state.status == "running":
                    return True
            else:
                return False
        else:
            return False
    def search_container(self):
        return docker.ps(all, filters={"name": self.name})
    def get_container_state(self):
        return docker.ps(all, filters={"name": self.name})

from unittest import TestCase, mock
from unittest.mock import patch
from src.check_container import Container
class Test(TestCase):
    @patch("src.check_container.Container.search_container")
    @patch("src.check_container.Container.get_container_state")
    def test_check_container(self, mock_container_state, mock_container):
        mock_container.return_value = [{"id": '123456789', "name": 'busybox'}]
        mock_container_state.return_value = [{"status": "running"}]
        container = Container("busybox")
        container_running = container.is_running()
        assert container_running is True

你的代码中有一些HTML实体字符，我已经去掉了它们，以便代码能够正确运行。希望这能帮助你解决问题。

have thought too far. With the following approach I was able to optimize the code and also make the test a bit easier.
check_container.py
    from python_on_whales import docker
    
    
    class Container:
        def __init__(self, name):
            self.name = name
    
        def is_running(self):
            if docker.ps(all=True, filters={"name": self.name, "status": "running"}):
                return True
            else:
                return False
test_check_container.py
    from unittest import TestCase
    from unittest.mock import patch
    
    from python_on_whales import docker
    
    from src.check_container import Container
    
    class TestDockerContainerRunning(TestCase):
    
        @patch("src.check_container.docker.ps", return_value=True)
        def test_container_running_mock(self, mock_container_state):
            assert Container("Foo").is_running() is True
With this few line of codes it's possible to check if a Docker container is running.
Another way is to run a Docker container for the test and remove it after:
    def test_container_running(self):
        with docker.run("busybox", ["sleep", "infinity"], detach=True, remove=True, name="busybox") as c:
            assert Container("busybox").is_running() is True