    @Test
    public void replayerShouldNotWorkWithoutAPreviouslyRecordedScript() {

        MarkdownReplayer m = new MarkdownReplayer();
        try {
            m.setPlaybackConversation("oh noes");
            fail("should have barfed");
        } catch (UnsupportedOperationException e) {
            assertEquals("No '## Interaction' found in conversation 'oh noes'. Wrong/empty script file?", e.getMessage());
        }
    }