49 lines
1.9 KiB
Python
49 lines
1.9 KiB
Python
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"""Tests for tools.environments.docker.find_docker — Docker CLI discovery."""
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import os
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from unittest.mock import patch
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import pytest
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from tools.environments import docker as docker_mod
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@pytest.fixture(autouse=True)
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def _reset_cache():
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"""Clear the module-level docker executable cache between tests."""
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docker_mod._docker_executable = None
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yield
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docker_mod._docker_executable = None
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class TestFindDocker:
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def test_found_via_shutil_which(self):
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with patch("tools.environments.docker.shutil.which", return_value="/usr/bin/docker"):
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result = docker_mod.find_docker()
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assert result == "/usr/bin/docker"
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def test_not_in_path_falls_back_to_known_locations(self, tmp_path):
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# Create a fake docker binary at a known path
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fake_docker = tmp_path / "docker"
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fake_docker.write_text("#!/bin/sh\n")
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fake_docker.chmod(0o755)
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with patch("tools.environments.docker.shutil.which", return_value=None), \
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patch("tools.environments.docker._DOCKER_SEARCH_PATHS", [str(fake_docker)]):
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result = docker_mod.find_docker()
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assert result == str(fake_docker)
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def test_returns_none_when_not_found(self):
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with patch("tools.environments.docker.shutil.which", return_value=None), \
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patch("tools.environments.docker._DOCKER_SEARCH_PATHS", ["/nonexistent/docker"]):
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result = docker_mod.find_docker()
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assert result is None
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def test_caches_result(self):
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with patch("tools.environments.docker.shutil.which", return_value="/usr/local/bin/docker"):
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first = docker_mod.find_docker()
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# Second call should use cache, not call shutil.which again
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with patch("tools.environments.docker.shutil.which", return_value=None):
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second = docker_mod.find_docker()
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assert first == second == "/usr/local/bin/docker"
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