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 +1,44 @@
+import pytest
+
+from unittest.mock import patch
+
+from conftest import RunnerFunc
+
+from commodore import version
+
+
+def test_version_cli(cli_runner: RunnerFunc):
+    result = cli_runner(["version"])
+    assert result.output.startswith("Commodore ")
+    # NOTE(sg): exit code is 0 if all external tools are available or 127
+    # otherwise.
+    assert result.exit_code == 0 or 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_reclass_rs_buildinfo_no_rust():
+    gojsonnet_so = version._native_find_so("gojsonnet")
+    with patch.object(version, "_native_find_so") as native_find_so_mock:
+        native_find_so_mock.return_value = gojsonnet_so
+        rustc = version._reclass_rs_buildinfo()
+        assert (
+            rustc
+            == "Unable to parse build info for reclass-rs: "
+            + "no unique rustc entry found in ELF .comment section"
+        )
+
+
+@pytest.mark.parametrize("dep", ["gojsonnet", "reclass-rs"])
+def test_version_buildinfo_no_unique_so(dep: str):
+    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[dep]()
+        assert build_info == "Mock Error"