Add tests for commodore version

Author: simu

tests/test_cli.py

@@ -102,3 +102,8 @@ def test_package_update_command():
 def test_package_sync_command():
     exit_status = call("commodore package sync --help", shell=True)
     assert exit_status == 0
+
+
+def test_version_command():
+    exit_status = call("commodore version --help", shell=True)
+    assert exit_status == 0

tests/test_version.py

@@ -0,0 +1,53 @@
+import sys
+
+import pytest
+
+from unittest.mock import patch
+from importlib.metadata import version as pyversion
+
+from conftest import RunnerFunc
+
+from commodore import version
+
+
+def test_version_cli(cli_runner: RunnerFunc):
+    result = cli_runner(["version"])
+    # NOTE(sg): exit code is 0 if all external tools are available
+    assert result.exit_code == 0
+    assert result.output.startswith("Commodore ")
+    assert "Core dependency versions" in result.output
+    assert f"kapitan: {pyversion('kapitan')}" in result.output
+    assert f"gojsonnet: {pyversion('gojsonnet')}" in result.output
+    assert f"reclass-rs: {pyversion('reclass-rs')}" in result.output
+    assert "External tool versions" in result.output
+    assert "helm: " in result.output
+    assert "jb: " in result.output
+    assert "kustomize: " in result.output
+
+
+def test_version_cli_missing_external(cli_runner: RunnerFunc, fs):
+    # allow access to the real Python prefix (system or virtualenv)
+    fs.add_real_directory(sys.prefix)
+    result = cli_runner(["version"])
+    assert "helm: NOT FOUND IN PATH" in result.output
+    assert "jb: NOT FOUND IN PATH" in result.output
+    assert "kustomize: NOT FOUND IN PATH" in result.output
+    # NOTE(sg): exit code is 127 if external tools are missing. We use pyfakefs
+    # to hide the host fs except for the Python prefix.
+    assert result.exit_code == 127
+
+
+def test_version_native_find_so_non_native():
+    with pytest.raises(ValueError) as exc:
+        version._native_find_so("kapitan")
+    assert "Unable to parse build info for kapitan: no unique *.so found" in str(exc)
+
+
+def test_version_gojsonnet_buildinfo_no_unique_so():
+    def mock_find_so(_dep):
+        raise ValueError("Mock Error")
+
+    with patch.object(version, "_native_find_so") as native_find_so_mock:
+        native_find_so_mock.side_effect = mock_find_so
+        build_info = version._buildinfo["gojsonnet"]()
+        assert build_info == "Mock Error"