private void executeOnKey(String[] args) {
        // executeOnKey <echo-string> <key>
        doExecute(true, false, args);
    }
@Test
    public void executeOnKey() {
        for (int i = 0; i < 100; i++) {
            consoleApp.handleCommand(String.format("executeOnKey message%d key%d", i, i));
            assertTextInSystemOut("message" + i);
        }
    }