azalea/kotlin-fork
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Implement in JS nextUp(), nextDown(), nextTowards() and ulp extensions

Browse Source 
#KT-4900
This commit is contained in:
Ilya Gorbunov
2017-08-31 22:12:08 +03:00
parent 480d4a0093
commit aa3bfc55c3
6 changed files with 138 additions and 37 deletions
Download Patch File Download Diff File Expand all files Collapse all files
libraries/stdlib/test/numbers/MathJVMTest.kt
-34
View File
@@ -32,38 +32,4 @@ class MathJVMTest {
assertEquals(PI, PI.IEEErem(Double.NEGATIVE_INFINITY))
}
@Test fun nextAndPrev() {
for (value in listOf(0.0, -0.0, Double.MIN_VALUE, -1.0, 2.0.pow(10))) {
val next = value.nextUp()
if (next > 0) {
assertEquals(next, value + value.ulp)
} else {
assertEquals(value, next - next.ulp)
}
val prev = value.nextDown()
if (prev > 0) {
assertEquals(value, prev + prev.ulp)
}
else {
assertEquals(prev, value - value.ulp)
}
val toZero = value.nextTowards(0.0)
if (toZero != 0.0) {
assertEquals(value, toZero + toZero.ulp.withSign(toZero))
}
assertEquals(Double.POSITIVE_INFINITY, Double.MAX_VALUE.nextUp())
assertEquals(Double.MAX_VALUE, Double.POSITIVE_INFINITY.nextDown())
assertEquals(Double.NEGATIVE_INFINITY, (-Double.MAX_VALUE).nextDown())
assertEquals((-Double.MAX_VALUE), Double.NEGATIVE_INFINITY.nextUp())
assertTrue(Double.NaN.ulp.isNaN())
assertTrue(Double.NaN.nextDown().isNaN())
assertTrue(Double.NaN.nextUp().isNaN())
assertTrue(Double.NaN.nextTowards(0.0).isNaN())
}
}
}
libraries/stdlib/test/numbers/MathTest.kt
+44
View File
@@ -321,6 +321,50 @@ class DoubleMathTest {
}
}
@Test fun nextAndPrev() {
for (value in listOf(0.0, -0.0, Double.MIN_VALUE, -1.0, 2.0.pow(10))) {
val next = value.nextUp()
if (next > 0) {
assertEquals(next, value + value.ulp)
} else {
assertEquals(value, next - next.ulp)
}
val prev = value.nextDown()
if (prev > 0) {
assertEquals(value, prev + prev.ulp)
}
else {
assertEquals(prev, value - value.ulp)
}
val toZero = value.nextTowards(0.0)
if (toZero != 0.0) {
assertEquals(value, toZero + toZero.ulp.withSign(toZero))
}
assertEquals(Double.POSITIVE_INFINITY, Double.MAX_VALUE.nextUp())
assertEquals(Double.MAX_VALUE, Double.POSITIVE_INFINITY.nextDown())
assertEquals(Double.NEGATIVE_INFINITY, (-Double.MAX_VALUE).nextDown())
assertEquals((-Double.MAX_VALUE), Double.NEGATIVE_INFINITY.nextUp())
assertTrue(Double.NaN.ulp.isNaN())
assertTrue(Double.NaN.nextDown().isNaN())
assertTrue(Double.NaN.nextUp().isNaN())
assertTrue(Double.NaN.nextTowards(0.0).isNaN())
assertEquals(Double.MIN_VALUE, (0.0).ulp)
assertEquals(Double.MIN_VALUE, (-0.0).ulp)
assertEquals(Double.POSITIVE_INFINITY, Double.POSITIVE_INFINITY.ulp)
assertEquals(Double.POSITIVE_INFINITY, Double.NEGATIVE_INFINITY.ulp)
val maxUlp = 2.0.pow(971)
assertEquals(maxUlp, Double.MAX_VALUE.ulp)
assertEquals(maxUlp, (-Double.MAX_VALUE).ulp)
}
}
}
class FloatMathTest {