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/* __ *\
** ________ ___ / / ___ __ ____ Scala.js Test Suite **
** / __/ __// _ | / / / _ | __ / // __/ (c) 2013, LAMP/EPFL **
** __\ \/ /__/ __ |/ /__/ __ |/_// /_\ \ http://scala-js.org/ **
** /____/\___/_/ |_/____/_/ | |__/ /____/ **
** |/____/ **
\* */
package scala.scalajs.testsuite.compiler
import org.scalajs.jasminetest.JasmineTest
object FloatTest extends JasmineTest {
def froundNotInlined(x: Double): Float = {
val y = x // so you don't inline me
y.toFloat
}
when("strict-floats").
describe("Strict floats") {
it("fround for special values") {
expect(froundNotInlined(Double.NaN).isNaN).toBeTruthy
expect(1 / froundNotInlined(0.0).toDouble).toBe(Double.PositiveInfinity)
expect(1 / froundNotInlined(-0.0).toDouble).toBe(Double.NegativeInfinity)
expect(froundNotInlined(Double.PositiveInfinity)).toBe(Float.PositiveInfinity)
expect(froundNotInlined(Double.NegativeInfinity)).toBe(Float.NegativeInfinity)
}
it("fround overflows") {
expect(froundNotInlined(1e200)).toBe(Double.PositiveInfinity)
expect(froundNotInlined(-1e200)).toBe(Double.NegativeInfinity)
}
it("fround underflows") {
expect(1 / froundNotInlined(1e-300).toDouble).toBe(Double.PositiveInfinity)
expect(1 / froundNotInlined(-1e-300).toDouble).toBe(Double.NegativeInfinity)
}
it("fround normal cases") {
def test(input: Double, expected: Double): Unit =
expect(input.toFloat.toDouble).toBe(expected)
// From MDN documentation
test(0.0, 0.0)
test(1.0, 1.0)
test(1.5, 1.5)
test(1.337, 1.3370000123977661)
test(-4.3, -4.300000190734863)
// Some bounds
test(Float.MinPositiveValue.toDouble, Float.MinPositiveValue.toDouble)
test(Float.MaxValue.toDouble, Float.MaxValue.toDouble)
test(Float.MinValue.toDouble, Float.MinValue.toDouble)
// Randomly generated Doubles
test(2.705609035558863E20, 2.7056090763400262E20)
test(-1.447710531503027E15, -1.447710532042752E15)
test(-5.1970024617732836E13, -5.1970022834176E13)
test(1.627661085098256E31, 1.6276610930768024E31)
test(-3.7731947682593834E-32, -3.7731946313230934E-32)
test(34.48229849163326, 34.4822998046875)
test(26.62034396181652, 26.620344161987305)
test(8.198435190113375E-24, 8.198434961596576E-24)
test(-6.079928908440255E-23, -6.079928963558556E-23)
test(3.3756949828462674E-13, 3.37569490589662E-13)
test(-1.2599049874324274E33, -1.2599049641449257E33)
test(6.08574575776438E-10, 6.085745796191588E-10)
test(1.973497969450596E-21, 1.973498047135062E-21)
}
}
}
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