Fix Python 3.6 compatibility
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@@ -29,12 +29,13 @@ def test_environment():
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@pytest.mark.slow
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def test_container_removed():
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with DockerContainer(DEFAULT_IMAGE) as container:
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# call a command to ensure it has started
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container.call(['true'])
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docker_containers_listing = subprocess.run('docker container ls', shell=True, check=True, capture_output=True, universal_newlines=True).stdout
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docker_containers_listing = subprocess.run('docker container ls', shell=True, check=True, stdout=subprocess.PIPE, universal_newlines=True).stdout
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assert container.name in docker_containers_listing
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old_container_name = container.name
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docker_containers_listing = subprocess.run('docker container ls', shell=True, check=True, capture_output=True, universal_newlines=True).stdout
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docker_containers_listing = subprocess.run('docker container ls', shell=True, check=True, stdout=subprocess.PIPE, universal_newlines=True).stdout
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assert old_container_name not in docker_containers_listing
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