code: public static String getLine(JUnitTestData testMethod) {
          String line = "~";
          Throwable testException = testMethod.getFailException();
          if (testException != null) {
              StringBuilder lookFor = new StringBuilder();
              lookFor.append(extractClassName(testMethod.getDescription()));
              lookFor.append('.');
              lookFor.append(extractMethodName(testMethod.getDescription()));
              lookFor.append('(');
              lookFor.append(extractSimpleClassName(testMethod.getDescription()));
              lookFor.append(".java:");
  
              StackTraceElement[] els = testException.getStackTrace();
  
              for (int i = 0; i < els.length; i++) {
                  StackTraceElement el = els[i];
                  line = getLineNumberFromExceptionTraceLine(el.toString(),
                                                             lookFor.toString());
                  if (line.equals("") == Boolean.FALSE) {
                      break;
                  }
              }
          }
          return line;
      }
docs: Get the line of the error in the exception info
  
  @param testMethod
  @return line of the error in the exception info