[tests] add pytest for util.cli

see #642

pytests/util/test_cli.py

@@ -0,0 +1,27 @@
+import pytest
+
+import util.cli
+
+def test_valid_command():
+    assert util.cli.execute("echo test") == "test\n"
+
+def test_utf_command():
+    rv = util.cli.execute("echo ÖPmŧß")
+    assert util.cli.execute("echo ÖPmŧß") == "ÖPmŧß\n"
+
+def test_invalid_command():
+    with pytest.raises(RuntimeError):
+        util.cli.execute("i-do-not-exist")
+
+def test_command_exit_code():
+    with pytest.raises(RuntimeError):
+        util.cli.execute("cat i-do-not-exist")
+
+def test_command_exit_code_no_error():
+    util.cli.execute("cat i-do-not-exist", ignore_errors=True)
+
+def test_async():
+    assert util.cli.execute("echo test", wait=False) == ""
+
+
+# vim: tabstop=8 expandtab shiftwidth=4 softtabstop=4