Add unit tests for run_subprocess

tests/test_utils.py

@@ -0,0 +1,21 @@
+import pytest
+from tljh import utils
+import subprocess
+import logging
+
+
+def test_run_subprocess_exception(mocker):
+    logger = logging.getLogger('tljh')
+    mocker.patch.object(logger, 'error')
+    with pytest.raises(subprocess.CalledProcessError):
+        utils.run_subprocess(
+            ['/bin/bash', '-c', 'echo error; exit 1']
+        )
+    logger.error.assert_called_with('error\n')
+
+
+def test_run_subprocess(mocker):
+    logger = logging.getLogger('tljh')
+    mocker.patch.object(logger, 'debug')
+    utils.run_subprocess(['/bin/bash', '-c', 'echo success'])
+    logger.debug.assert_called_with('success\n')