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import subprocess
from unittest.mock import call
import pytest
from briefcase.exceptions import BriefcaseCommandError
@pytest.mark.usefixtures("mock_docker")
def test_cache_image(mock_tools, sub_kw, sub_check_output_kw):
"""A Docker image can be cached."""
# mock image not being cached in Docker
mock_tools.subprocess._subprocess.check_output.return_value = ""
# Cache an image
mock_tools.docker.cache_image("ubuntu:jammy")
# Confirms that image is not available
mock_tools.subprocess._subprocess.check_output.assert_called_with(
["docker", "images", "-q", "ubuntu:jammy"],
env={"PROCESS_ENV_VAR": "VALUE", "DOCKER_CLI_HINTS": "false"},
**sub_check_output_kw,
)
# Image is pulled and cached
mock_tools.subprocess._subprocess.run.assert_has_calls(
[
call(
["docker", "pull", "ubuntu:jammy"],
check=True,
env={"PROCESS_ENV_VAR": "VALUE", "DOCKER_CLI_HINTS": "false"},
**sub_kw,
),
]
)
@pytest.mark.usefixtures("mock_docker")
def test_cache_image_already_cached(mock_tools, sub_check_output_kw):
"""A Docker image is not pulled if it is already cached."""
# mock image already cached in Docker
mock_tools.subprocess._subprocess.check_output.return_value = "99284ca6cea0"
# Cache an image
mock_tools.docker.cache_image("ubuntu:jammy")
# Confirms that image is not available
mock_tools.subprocess._subprocess.check_output.assert_called_with(
["docker", "images", "-q", "ubuntu:jammy"],
env={"PROCESS_ENV_VAR": "VALUE", "DOCKER_CLI_HINTS": "false"},
**sub_check_output_kw,
)
# Image is not pulled and cached
mock_tools.subprocess._subprocess.run.assert_has_calls([])
@pytest.mark.usefixtures("mock_docker")
def test_cache_bad_image(mock_tools):
"""If an image is invalid, an exception raised."""
# mock image not being cached in Docker
mock_tools.subprocess._subprocess.check_output.return_value = ""
# Mock a Docker failure due to a bad image
mock_tools.subprocess._subprocess.run.side_effect = subprocess.CalledProcessError(
returncode=125, cmd="docker..."
)
# Try to cache an image that doesn't exist
with pytest.raises(
BriefcaseCommandError,
match=r"Unable to obtain the Docker image for ubuntu:does-not-exist.",
):
mock_tools.docker.cache_image("ubuntu:does-not-exist")
|
