feat(tests): Add testretry simple test case

Add relevant entry to test file

Signed-off-by: Denys Fedoryshchenko <denys.f@collabora.com>

tests/test_kcidev.py

@@ -38,3 +38,13 @@ def test_kcidev_patch_help():
     print("#### stderr ####")
     print(result.stderr)
     assert result.returncode == 0
+
+def test_kcidev_testretry_help():
+    command = ["poetry", "run", "kci-dev", "testretry", "--help"]
+    result = run(command, stdout=PIPE, stderr=PIPE, universal_newlines=True)
+    print("returncode: " + str(result.returncode))
+    print("#### stdout ####")
+    print(result.stdout)
+    print("#### stderr ####")
+    print(result.stderr)
+    assert result.returncode == 0