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package scala.lang.primitives
import org.junit.Assert._
import org.junit.Test
import org.junit.runner.RunWith
import org.junit.runners.JUnit4
import scala.tools.testing.RunTesting
@RunWith(classOf[JUnit4])
class NaNTest extends RunTesting {
@Test
def compNaNFalse(): Unit = {
def code(tp: String) =
s"""val n = $tp.NaN
|def ne(x: $tp, y: $tp) = x != y
|val fs: List[($tp, $tp) => Boolean] = List(_ < _, _ <= _, _ > _, _ >= _, _ == _, (x, y) => !ne(x, y))
|val vs = List[$tp](n, 1, -1, 0)
|for (f <- fs; v <- vs; (x, y) <- List((n, v), (v, n))) yield f(x, y)
""".stripMargin
runner.run[List[Boolean]](code("Double")).foreach(assertFalse)
runner.run[List[Boolean]](code("Float")).foreach(assertFalse)
}
@Test
def genericEqNe(): Unit = {
def code(tp: String) =
s"""def a[T](x: T, y: T) = x == y
|def b[T](x: T, y: T) = x != y
|val n = $tp.NaN
|a(n, n) :: a(n, 0) :: a (0, n) :: !b(n, n) :: !b(n, 0) :: !b(0, n) :: Nil
""".stripMargin
runner.run[List[Boolean]](code("Double")).foreach(assertFalse)
runner.run[List[Boolean]](code("Float")).foreach(assertFalse)
}
}
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