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/*
* Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
* that can be found in the license/LICENSE.txt file.
*/
package test.unsigned
import kotlin.math.nextDown
import kotlin.math.nextUp
import kotlin.math.pow
import kotlin.math.sign
import kotlin.random.Random
import kotlin.test.*
class UIntTest {
private fun identity(u: UInt): UInt =
(u.toInt() + 0).toUInt()
val zero = 0u
val one = 1u
val max = UInt.MAX_VALUE
@Test
fun equality() {
fun testEqual(uv1: UInt, uv2: UInt) {
assertEquals(uv1, uv2, "Boxed values should be equal")
assertTrue(uv1.equals(uv2), "Boxed values should be equal: $uv1, $uv2")
assertTrue(uv1 == uv2, "Values should be equal: $uv1, $uv2")
assertEquals(uv1.hashCode(), uv2.hashCode())
assertEquals((uv1 as Any).hashCode(), (uv2 as Any).hashCode())
assertEquals(uv1.toString(), uv2.toString())
assertEquals((uv1 as Any).toString(), (uv2 as Any).toString())
}
testEqual(one, identity(one))
testEqual(max, identity(max))
fun testNotEqual(uv1: UInt, uv2: UInt) {
assertNotEquals(uv1, uv2, "Boxed values should be equal")
assertTrue(uv1 != uv2, "Values should be not equal: $uv1, $uv2")
assertNotEquals(uv1.toString(), uv2.toString())
assertNotEquals((uv1 as Any).toString(), (uv2 as Any).toString())
}
testNotEqual(one, zero)
testNotEqual(max, zero)
}
@Test
fun convertToString() {
fun testToString(expected: String, u: UInt) {
assertEquals(expected, u.toString())
assertEquals(expected, (u as Any).toString(), "Boxed toString")
assertEquals(expected, "$u", "String template")
}
repeat(100) {
val v = Random.nextBits(UInt.SIZE_BITS - 1)
testToString(v.toString(), v.toUInt())
}
repeat(100) {
val v = Random.nextInt(294967295 + 1)
testToString("4${v.toString().padStart(9, '0')}", (2_000_000_000.toUInt() * 2.toUInt() + v.toUInt()))
}
testToString("4294967295", UInt.MAX_VALUE)
}
@Test
fun comparisons() {
fun <T> compare(op1: Comparable<T>, op2: T) = op1.compareTo(op2)
fun testComparison(uv1: UInt, uv2: UInt, expected: Int) {
val desc = "${uv1.toString()}, ${uv2.toString()}"
assertEquals(expected, uv1.compareTo(uv2).sign, "compareTo: $desc")
assertEquals(expected, (uv1 as Comparable<UInt>).compareTo(uv2).sign, "Comparable.compareTo: $desc")
assertEquals(expected, compare(uv1, uv2).sign, "Generic compareTo: $desc")
assertEquals(expected < 0, uv1 < uv2)
assertEquals(expected <= 0, uv1 <= uv2)
assertEquals(expected > 0, uv1 > uv2)
assertEquals(expected >= 0, uv1 >= uv2)
}
fun testEquals(uv1: UInt, uv2: UInt) = testComparison(uv1, uv2, 0)
fun testCompare(uv1: UInt, uv2: UInt, expected12: Int) {
testComparison(uv1, uv2, expected12)
testComparison(uv2, uv1, -expected12)
}
testEquals(one, identity(one))
testEquals(max, identity(max))
testCompare(zero, one, -1)
testCompare(Int.MAX_VALUE.toUInt(), zero, 1)
testCompare(zero, UInt.MAX_VALUE, -1)
testCompare((Int.MAX_VALUE).toUInt() + one, UInt.MAX_VALUE, -1)
}
@Test
fun convertToFloat() {
fun testEquals(v1: Float, v2: UInt) = assertEquals(v1, v2.toFloat())
testEquals(0.0f, zero)
testEquals(1.0f, one)
testEquals(0xFFFF_FFFF.toFloat(), max)
repeat(100) {
val long = Random.nextLong(0, 0xFFFF_FFFF)
testEquals(long.toFloat(), long.toUInt())
}
}
@Test
fun convertToDouble() {
fun testEquals(v1: Double, v2: UInt) = assertEquals(v1, v2.toDouble())
testEquals(0.0, zero)
testEquals(1.0, one)
testEquals(max.toLong().toDouble(), max)
repeat(100) {
val long = Random.nextLong(0, max.toLong())
testEquals(long.toDouble(), long.toUInt())
}
fun testRounding(from: UInt, count: UInt) {
for (x in from..(from + count)) {
val double = x.toDouble()
val v = double.toUInt()
val down = double.nextDown().toUInt()
val up = double.nextUp().toUInt()
assertTrue(down <= x && down <= v)
assertTrue(up >= x && up >= v)
if (v > x) {
assertTrue(v - x <= x - down, "Expected $x being closer to $v than to $down")
} else {
assertTrue(x - v <= up - x, "Expected $x being closer to $v than to $up")
}
}
}
testRounding(0u, 100u)
testRounding(Int.MAX_VALUE.toUInt() - 10u, 100u)
testRounding(UInt.MAX_VALUE - 100u, 100u)
}
@Test
fun convertDoubleToUInt() {
fun testEquals(v1: Double, v2: UInt) = assertEquals(v1.toUInt(), v2)
testEquals(0.0, zero)
testEquals(-1.0, zero)
testEquals(-2_000_000_000_000.0, zero)
testEquals(-(2.0.pow(UInt.SIZE_BITS + 12)), zero)
testEquals(Double.MIN_VALUE, zero)
testEquals(Double.NEGATIVE_INFINITY, zero)
testEquals(Double.NaN, zero)
testEquals(1.0, one)
testEquals(2_000_000_000_000.0, max)
testEquals(max.toDouble(), max)
testEquals(2.0.pow(UInt.SIZE_BITS), max)
testEquals(2.0.pow(UInt.SIZE_BITS + 12), max)
testEquals(Double.MAX_VALUE, max)
testEquals(Double.POSITIVE_INFINITY, max)
repeat(100) {
val v = -Random.nextDouble(until = 2.0.pow(UInt.SIZE_BITS + 8))
testEquals(v, zero)
}
repeat(100) {
val v = Random.nextDouble(from = max.toDouble(), until = 2.0.pow(UInt.SIZE_BITS + 8))
testEquals(v, max)
}
repeat(100) {
val v = Random.nextDouble(until = max.toDouble())
testEquals(v, v.toLong().toUInt())
}
}
}
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