infix fun LocalDateTime.shouldHaveMonth(month: Int): Unit
Asserts that the month inputted is equaled the date month
val date = LocalDateTime.of(2019, 2, 15, 12, 0, 0, 0)
date.shouldHaveMonth(2) // Assertion passes
date.shouldHaveMonth(FEBRUARY) // Assertion passes
infix fun LocalDateTime.shouldHaveMonth(month: Month): Unit