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184 lines
7.5 KiB
Python
184 lines
7.5 KiB
Python
"""Unit tests for devx.molecule.start_docker."""
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from unittest.mock import MagicMock, mock_open, patch
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from click.testing import CliRunner
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from devx.molecule.start_docker import (
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DOCKER_SOCK,
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_diagnose_socket,
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is_docker_ready,
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main,
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start_docker_daemon,
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)
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class TestIsDockerReady:
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@patch("devx.molecule.start_docker.subprocess.run")
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def test_ready(self, mock_run: MagicMock) -> None:
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mock_run.return_value = MagicMock(returncode=0)
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assert is_docker_ready() is True
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call_kwargs = mock_run.call_args
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assert call_kwargs.args[0] == ["docker", "info"]
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assert call_kwargs.kwargs["env"]["DOCKER_HOST"] == f"unix://{DOCKER_SOCK}"
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@patch("devx.molecule.start_docker.subprocess.run")
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def test_not_ready(self, mock_run: MagicMock) -> None:
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mock_run.return_value = MagicMock(returncode=1)
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assert is_docker_ready() is False
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class TestDiagnoseSocket:
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@patch("devx.molecule.start_docker.os.stat")
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@patch("devx.molecule.start_docker.os.path.exists", return_value=True)
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@patch("devx.molecule.start_docker.subprocess.run")
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def test_socket_exists(self, mock_run: MagicMock, mock_exists: MagicMock, mock_stat: MagicMock) -> None:
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mock_stat.return_value = MagicMock(st_mode=0o660, st_uid=0, st_gid=0)
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mock_run.side_effect = [
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MagicMock(stdout="/dev/sda1 /var/lib/docker ext4\n", returncode=0, text=""),
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MagicMock(stdout="default\n", returncode=0, text=""),
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MagicMock(
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stdout="Server Version: 29.5.2\nStorage Driver: overlay2\nDocker Root Dir: /var/lib/docker\n",
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returncode=0,
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text="",
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),
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]
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_diagnose_socket()
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mock_exists.assert_called_with(DOCKER_SOCK)
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@patch("devx.molecule.start_docker.os.path.exists", return_value=False)
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@patch("devx.molecule.start_docker.subprocess.run")
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def test_socket_missing(self, mock_run: MagicMock, mock_exists: MagicMock) -> None:
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mock_run.side_effect = [
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MagicMock(stdout="proc on /proc type proc\n", returncode=0, text=""),
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MagicMock(stdout="default\n", returncode=0, text=""),
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MagicMock(stdout="", stderr="Cannot connect", returncode=1, text=""),
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]
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_diagnose_socket()
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mock_exists.assert_called_with(DOCKER_SOCK)
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class TestStartDockerDaemon:
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@patch("devx.molecule.start_docker._diagnose_socket")
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@patch("devx.molecule.start_docker.is_docker_ready", return_value=True)
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def test_host_socket_available(self, mock_ready: MagicMock, mock_diag: MagicMock) -> None:
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"""Should return immediately if host Docker is available."""
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assert start_docker_daemon(timeout=5) is True
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mock_ready.assert_called_once()
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mock_diag.assert_called_once()
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@patch("devx.molecule.start_docker._diagnose_socket")
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@patch("devx.molecule.start_docker.time.sleep")
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@patch("devx.molecule.start_docker.is_docker_ready")
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@patch("devx.molecule.start_docker.subprocess.Popen")
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@patch("devx.molecule.start_docker.tempfile.NamedTemporaryFile")
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def test_starts_local_daemon(
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self,
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mock_ntf: MagicMock,
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mock_popen: MagicMock,
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mock_ready: MagicMock,
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mock_sleep: MagicMock,
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mock_diag: MagicMock,
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) -> None:
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mock_ntf.return_value = MagicMock(name="/tmp/dockerd.log")
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mock_ready.side_effect = [False, False, False, True]
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assert start_docker_daemon(timeout=5) is True
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mock_popen.assert_called_once()
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popen_args = mock_popen.call_args.args[0]
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assert "dockerd" in popen_args
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assert "--storage-driver" in popen_args
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assert "vfs" in popen_args
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assert "-H" in popen_args
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assert f"unix://{DOCKER_SOCK}" in popen_args
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assert mock_sleep.call_count == 2
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@patch("devx.molecule.start_docker._diagnose_socket")
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@patch("devx.molecule.start_docker.time.sleep")
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@patch("devx.molecule.start_docker.is_docker_ready", return_value=False)
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@patch("devx.molecule.start_docker.subprocess.Popen")
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@patch("devx.molecule.start_docker.tempfile.NamedTemporaryFile")
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def test_fails_after_timeout(
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self,
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mock_ntf: MagicMock,
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mock_popen: MagicMock,
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mock_ready: MagicMock,
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mock_sleep: MagicMock,
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mock_diag: MagicMock,
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) -> None:
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mock_ntf.return_value = MagicMock(name="/tmp/dockerd.log")
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with patch("builtins.open", mock_open(read_data="dockerd error log")):
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assert start_docker_daemon(timeout=3) is False
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mock_popen.assert_called_once()
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assert mock_sleep.call_count == 3
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@patch("devx.molecule.start_docker._diagnose_socket")
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@patch("devx.molecule.start_docker.time.sleep")
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@patch("devx.molecule.start_docker.is_docker_ready", return_value=False)
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@patch("devx.molecule.start_docker.subprocess.Popen")
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@patch("devx.molecule.start_docker.tempfile.NamedTemporaryFile")
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def test_fails_log_read_error(
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self,
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mock_ntf: MagicMock,
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mock_popen: MagicMock,
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mock_ready: MagicMock,
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mock_sleep: MagicMock,
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mock_diag: MagicMock,
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) -> None:
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"""Should handle log read errors gracefully."""
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mock_ntf.return_value = MagicMock(name="/tmp/dockerd.log")
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with patch("builtins.open", side_effect=OSError("permission denied")):
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assert start_docker_daemon(timeout=2) is False
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@patch("devx.molecule.start_docker._diagnose_socket")
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@patch("devx.molecule.start_docker.time.sleep")
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@patch("devx.molecule.start_docker.is_docker_ready")
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@patch("devx.molecule.start_docker.subprocess.Popen")
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@patch("devx.molecule.start_docker.tempfile.NamedTemporaryFile")
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def test_local_daemon_ready_on_first_check(
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self,
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mock_ntf: MagicMock,
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mock_popen: MagicMock,
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mock_ready: MagicMock,
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mock_sleep: MagicMock,
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mock_diag: MagicMock,
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) -> None:
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mock_ntf.return_value = MagicMock(name="/tmp/dockerd.log")
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mock_ready.side_effect = [False, False, True]
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assert start_docker_daemon(timeout=5) is True
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mock_popen.assert_called_once()
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mock_sleep.assert_called_once_with(1)
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@patch("devx.molecule.start_docker._diagnose_socket")
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@patch("devx.molecule.start_docker.os.environ")
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@patch("devx.molecule.start_docker.is_docker_ready", return_value=True)
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def test_sets_docker_host(
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self,
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mock_ready: MagicMock,
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mock_environ: MagicMock,
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mock_diag: MagicMock,
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) -> None:
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"""DOCKER_HOST must be set so molecule connects to correct socket."""
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start_docker_daemon(timeout=5)
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mock_environ.__setitem__.assert_called_with("DOCKER_HOST", f"unix://{DOCKER_SOCK}")
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class TestMain:
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@patch("devx.molecule.start_docker.start_docker_daemon", return_value=True)
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def test_success(self, mock_start: MagicMock) -> None:
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runner = CliRunner()
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result = runner.invoke(main, [])
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assert result.exit_code == 0
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@patch("devx.molecule.start_docker.start_docker_daemon", return_value=False)
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def test_failure(self, mock_start: MagicMock) -> None:
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runner = CliRunner()
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result = runner.invoke(main, [])
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assert result.exit_code == 1
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@patch("devx.molecule.start_docker.start_docker_daemon", return_value=True)
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def test_custom_timeout_flag(self, mock_start: MagicMock) -> None:
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runner = CliRunner()
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result = runner.invoke(main, ["--timeout", "60"])
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assert result.exit_code == 0
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mock_start.assert_called_once_with(60)
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