public static void checkHttpTimeoutProperty() throws NumberFormatException {
    checkNumericSystemProperty(HTTP_TIMEOUT, Range.atLeast(0));
  }
@Test
  public void testCheckHttpTimeoutProperty_stringValue() {
    System.setProperty(JibSystemProperties.HTTP_TIMEOUT, "random string");
    try {
      JibSystemProperties.checkHttpTimeoutProperty();
      Assert.fail();
    } catch (NumberFormatException ex) {
      Assert.assertEquals("jib.httpTimeout must be an integer: random string", ex.getMessage());
    }
  }