@Test
public void getQueueExpireAfter_returnsNullIfHeaderValueIsNaN(TestContext testContext) {

    // Mock
    final String headerValue = "Definitively not a number :)";
    final MultiMap headers = createHeaderReturningSimpleValue(HTTP_HEADER_X_QUEUE_EXPIRE_AFTER, headerValue);
    // Trigger work
    final Integer returnedValue = ExpiryCheckHandler.getQueueExpireAfter(headers);
    // Assert
    testContext.assertNull(returnedValue);
}