code: public void text(String expectedPattern) {
          String text = checkText(expectedPattern, 0, 0);
          assertNotNull(NO_ELEMENT_FOUND, text);
          assertTrue("Text Mismatch: text of '" + text + DOES_NOT_MATCH_PATTERN + expectedPattern + "'", text.matches(expectedPattern));
      }
docs: Asserts that the element's text matches the regular expression pattern provided. If
  the element isn't present, this will constitute a failure, same as a
  mismatch. This information will be logged and recorded, with a screenshot
  for traceability and added debugging support.
  
  @param expectedPattern the expected pattern of the text of the element