actual should be { expected } and actual should not be { expected }

ShouldBeShouldNotBe.kt

class SN<T>(val value: T)
class B<T>(val value: T)

infix fun <T> T.should(right: B<T>): Unit {
	println("$this is ${right.value}")
}

fun <T> be(value: () -> T): B<T> {
	return B(value())
}

infix fun <T> T.should(right: not): SN<T> = SN(this)

object not

infix fun <T> SN<T>.be(value: () -> T): Unit {
	println("${this.value} isn't ${value()}")
}

fun main(args: Array<String>) {
	(1) should be { 1 }

	(1) should not be { 2 }

	(1) should be { 1 }

	(1 + 1) should be { 2 }

	1 should be { 1 }

	(2) should not be { 1 }
}