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import subprocess
from unittest.mock import call
import pytest
@pytest.mark.usefixtures("mock_docker")
def test_check_output(mock_tools, sub_check_output_kw):
"""A command can be invoked on a bare Docker image."""
# mock image already being cached in Docker
mock_tools.subprocess._subprocess.check_output.side_effect = [
"1ed313b0551f",
"output",
]
# Run the command in a container
mock_tools.docker.check_output(["cmd", "arg1", "arg2"], image_tag="ubuntu:jammy")
mock_tools.subprocess._subprocess.check_output.assert_has_calls(
[
# Verify image is cached in Docker
call(
["docker", "images", "-q", "ubuntu:jammy"],
env={"PROCESS_ENV_VAR": "VALUE", "DOCKER_CLI_HINTS": "false"},
**sub_check_output_kw,
),
# Run command in Docker using image
call(
["docker", "run", "--rm", "ubuntu:jammy", "cmd", "arg1", "arg2"],
env={"PROCESS_ENV_VAR": "VALUE", "DOCKER_CLI_HINTS": "false"},
**sub_check_output_kw,
),
]
)
@pytest.mark.usefixtures("mock_docker")
def test_check_output_fail(mock_tools, sub_check_output_kw):
"""Any subprocess errors are passed back through directly."""
# mock image already being cached in Docker and check_output() call fails
mock_tools.subprocess._subprocess.check_output.side_effect = [
"1ed313b0551f",
subprocess.CalledProcessError(
returncode=1,
cmd=["cmd", "arg1", "arg2"],
output="This didn't work\n",
),
]
# The CalledProcessError surfaces from Docker().check_output()
with pytest.raises(subprocess.CalledProcessError):
mock_tools.docker.check_output(
["cmd", "arg1", "arg2"], image_tag="ubuntu:jammy"
)
mock_tools.subprocess._subprocess.check_output.assert_has_calls(
[
# Verify image is cached in Docker
call(
["docker", "images", "-q", "ubuntu:jammy"],
env={"PROCESS_ENV_VAR": "VALUE", "DOCKER_CLI_HINTS": "false"},
**sub_check_output_kw,
),
# Command errors in Docker using image
call(
["docker", "run", "--rm", "ubuntu:jammy", "cmd", "arg1", "arg2"],
env={"PROCESS_ENV_VAR": "VALUE", "DOCKER_CLI_HINTS": "false"},
**sub_check_output_kw,
),
]
)
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