code: public void selectedValue(String expectedValue) {
          String value = checkSelectedValue(expectedValue, 0, 0);
          String reason = NO_ELEMENT_FOUND;
          if (value == null && getElement().is().present()) {
              reason = ELEMENT_NOT_SELECT;
          }
          assertNotNull(reason, value);
          assertEquals("Selected Value Mismatch", expectedValue, value);
      }
docs: Asserts that the element's selected value equals the provided expected
  value. 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 expectedValue the expected input value of the element