code: @SuppressWarnings("squid:S2259")
      public void selectedValue(String expectedPattern) {
          String selectedValue = checkSelectedValue(expectedPattern, 0, 0);
          String reason = NO_ELEMENT_FOUND;
          if (selectedValue == null && getElement().is().present()) {
              reason = ELEMENT_NOT_SELECT;
          }
          assertNotNull(reason, selectedValue);
          assertTrue("Selected Value Mismatch: value of '" + selectedValue + DOES_NOT_MATCH_PATTERN + expectedPattern + "'",
                  selectedValue.matches(expectedPattern));
      }
docs: Asserts that the element's selected value  matches the regular expression pattern
  provided. If the element isn't present or a select, 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 input value of the element