### Question:
Html { public static String brTagsToLineBreaks(String string) { return string == null ? null : string.replace("<br/>", "\n"); }  static String escapeHtml(String html); static String unEscapeHtml(String html); static String lineBreaksToBrTags(String string); static String brTagsToLineBreaks(String string);  }### Answer:
@Test public void brTagsToLineBreaksWhenLineBreakBetweenTwoParagraphs() throws Exception { assertEquals("a\nb", Html.brTagsToLineBreaks("a<br/>b")); }