make sure our error msg is styled and shown

tests/test_utils.py

@@ -7,6 +7,9 @@
 class TestPrintHelp:
 
     def test_print_help(self, mocker):
+        spy = mocker.spy(click, "style")
+        msg = "Error msg"
+
         class MockContext:
 
             def get_help(self):
@@ -17,5 +20,10 @@ def exit(self):
 
         mock_get_current_context = MockContext()
         ctx = mocker.patch.object(click, "get_current_context", return_value=mock_get_current_context)
-        print_help("Yo")
+        print_help(msg)
+        # assert our message is styled with error styling (red).
+        # wrapped in click.echo so it will be shown
+        spy.assert_called_once_with(msg, fg="red")
+        # asserts that the context manager is fetched
+        # to show help text for a command
         ctx.assert_called_once()