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linux-packaging-mono/mcs/class/corlib/Test/System/MathTest.cs
Xamarin Public Jenkins (auto-signing) 0510252385 Imported Upstream version 5.20.0.180 
Former-commit-id: ff953ca879339fe1e1211f7220f563e1342e66cb
2019-02-04 20:11:37 +00:00

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// MathTest.cs
//
// Jon Guymon (guymon@slackworks.com)
// Pedro Martínez Juliá (yoros@wanadoo.es)
//
// (C) 2002 Jon Guymon
// Copyright (C) 2003 Pedro Martínez Juliá <yoros@wanadoo.es>
// Copyright (C) 2004 Novell (http://www.novell.com)
//
using System;
using NUnit.Framework;
namespace MonoTests.System
{
[TestFixture]
public class MathTest
{
private static double double_epsilon = 2.2204460492503131e-16; /* DBL_EPSILON = 2^-52 */
static double x = 0.1234;
static double y = 12.345;
[Test]
public void TestDecimalAbs ()
{
decimal a = -9.0M;
Assert.IsTrue (9.0M == Math.Abs (a), "#1");
Assert.IsTrue (Decimal.MaxValue == Math.Abs (Decimal.MaxValue), "#2");
Assert.IsTrue (Decimal.MaxValue == Math.Abs (Decimal.MinValue), "#3");
Assert.IsTrue (Decimal.Zero == Math.Abs (Decimal.Zero), "#4");
Assert.IsTrue (Decimal.One == Math.Abs (Decimal.One), "#5");
Assert.IsTrue (Decimal.One == Math.Abs (Decimal.MinusOne), "#6");
}
[Test]
public void TestDoubleAbs ()
{
double a = -9.0D;
Assert.IsTrue (9.0D == Math.Abs (a), "#1");
Assert.IsTrue (0.0D == Math.Abs (0.0D), "#2");
Assert.IsTrue (Double.MaxValue == Math.Abs (Double.MaxValue), "#3");
Assert.IsTrue (Double.MaxValue == Math.Abs (Double.MinValue), "#4");
Assert.IsTrue (Double.IsPositiveInfinity (Math.Abs (Double.PositiveInfinity)), "#5");
Assert.IsTrue (Double.IsPositiveInfinity (Math.Abs (Double.NegativeInfinity)), "#6");
Assert.IsTrue (Double.IsNaN (Math.Abs (Double.NaN)), "#7");
}
[Test]
public void TestFloatAbs ()
{
float a = -9.0F;
Assert.IsTrue (9.0F == Math.Abs (a), "#1");
Assert.IsTrue (0.0F == Math.Abs (0.0F), "#2");
Assert.IsTrue (Single.MaxValue == Math.Abs (Single.MaxValue), "#3");
Assert.IsTrue (Single.MaxValue == Math.Abs (Single.MinValue), "#4");
Assert.IsTrue (Single.PositiveInfinity == Math.Abs (Single.PositiveInfinity), "#5");
Assert.IsTrue (Single.PositiveInfinity == Math.Abs (Single.NegativeInfinity), "#6");
Assert.IsTrue (Single.IsNaN (Math.Abs (Single.NaN)), "#7");
}
[Test]
public void TestLongAbs ()
{
long a = -9L;
long b = Int64.MinValue;
Assert.IsTrue (9L == Math.Abs (a), "#1");
try {
Math.Abs (b);
Assert.Fail ("#2");
} catch (Exception e) {
Assert.AreEqual (typeof (OverflowException), e.GetType (), "#3");
}
Assert.IsTrue (Int64.MaxValue == Math.Abs (Int64.MaxValue), "#4");
}
[Test]
public void TestIntAbs ()
{
int a = -9;
int b = Int32.MinValue;
Assert.IsTrue (9 == Math.Abs (a), "#1");
try {
Math.Abs (b);
Assert.Fail ("#2");
} catch (Exception e) {
Assert.AreEqual (typeof (OverflowException), e.GetType (), "#3");
}
Assert.IsTrue (Int32.MaxValue == Math.Abs (Int32.MaxValue), "#4");
}
[Test]
public void TestSbyteAbs ()
{
sbyte a = -9;
sbyte b = SByte.MinValue;
Assert.IsTrue (9 == Math.Abs (a), "#1");
try {
Math.Abs (b);
Assert.Fail ("#2");
} catch (Exception e) {
Assert.AreEqual (typeof (OverflowException), e.GetType (), "#3");
}
Assert.IsTrue (SByte.MaxValue == Math.Abs (SByte.MaxValue), "#4");
}
[Test]
public void TestShortAbs ()
{
short a = -9;
short b = Int16.MinValue;
Assert.IsTrue (9 == Math.Abs (a), "#1");
try {
Math.Abs (b);
Assert.Fail ("#2");
} catch (Exception e) {
Assert.AreEqual (typeof (OverflowException), e.GetType (), "#3");
}
Assert.IsTrue (Int16.MaxValue == Math.Abs (Int16.MaxValue), "#4");
}
[Test]
public void TestAcos ()
{
double a = Math.Acos (x);
double b = 1.4470809809523457;
bool regularTest = (Math.Abs (a - b) <= double_epsilon);
if (!regularTest){
//
// On MacOS X libc acos (0.1234) returns
// 1.4470809809523455 (hex 0x3ff7273e62fda9ab) instead
// of 1.4470809809523457 (hex 0x3ff7273e62fda9ac)
//
// For now, let it go
//
if (a == 1.4470809809523455)
regularTest = true;
}
Assert.IsTrue (regularTest, a.ToString ("G99") + " != " + b.ToString ("G99"));
Assert.IsTrue (double.IsNaN (Math.Acos (-1.01D)));
Assert.IsTrue (double.IsNaN (Math.Acos (1.01D)));
Assert.IsTrue (double.IsNaN (Math.Acos (Double.MinValue)));
Assert.IsTrue (double.IsNaN (Math.Acos (Double.MaxValue)));
Assert.IsTrue (double.IsNaN (Math.Acos (Double.NegativeInfinity)));
Assert.IsTrue (double.IsNaN (Math.Acos (Double.PositiveInfinity)));
}
[Test]
public void TestAsin ()
{
double a = Math.Asin (x);
double b = 0.12371534584255098;
Assert.IsTrue ((Math.Abs (a - b) <= double_epsilon), a.ToString ("G99")
+ " != " + b.ToString ("G99"));
Assert.IsTrue (double.IsNaN (Math.Asin (-1.01D)));
Assert.IsTrue (double.IsNaN (Math.Asin (1.01D)));
Assert.IsTrue (double.IsNaN (Math.Asin (Double.MinValue)));
Assert.IsTrue (double.IsNaN (Math.Asin (Double.MaxValue)));
Assert.IsTrue (double.IsNaN (Math.Asin (Double.NegativeInfinity)));
Assert.IsTrue (double.IsNaN (Math.Asin (Double.PositiveInfinity)));
}
[Test]
public void TestAtan ()
{
double a = Math.Atan (x);
double b = 0.12277930094473837;
double c = 1.5707963267948966;
double d = -1.5707963267948966;
Assert.IsTrue ((Math.Abs (a - b) <= double_epsilon), "#1: " + a.ToString ("G99")
+ " != " + b.ToString ("G99"));
Assert.IsTrue (double.IsNaN (Math.Atan (double.NaN)), "should return NaN");
Assert.IsTrue (Math.Abs ((double) Math.Atan (double.PositiveInfinity) - c) <= 0.0000000000000001,
"#2: " + Math.Atan (double.PositiveInfinity).ToString ("G99") + " != " + c.ToString ("G99"));
Assert.IsTrue (Math.Abs ((double) Math.Atan (double.NegativeInfinity) - d) <= 0.0000000000000001,
"#3: " + Math.Atan (double.NegativeInfinity).ToString ("G99") + " != " + d.ToString ("G99"));
}
[Test]
public void TestAtan2 ()
{
double a = Math.Atan2 (x, y);
double b = 0.0099956168687207747;
Assert.IsTrue ((Math.Abs (a - b) <= double_epsilon), a.ToString ("G99")
+ " != " + b.ToString ("G99"));
Assert.IsTrue (double.IsNaN (Math.Acos (-2D)));
Assert.IsTrue (double.IsNaN (Math.Acos (2D)));
}
// The following test is for methods that are in ECMA but they are
// not implemented in MS.NET. I leave them commented.
/*
public void TestBigMul () {
int a = int.MaxValue;
int b = int.MaxValue;
Assert(((long)a * (long)b) == Math.BigMul(a,b));
}
*/
[Test]
public void TestCos ()
{
double a = Math.Cos (x);
double b = 0.99239587670489104;
Assert.IsTrue ((Math.Abs (a - b) <= double_epsilon), a.ToString ("G99")
+ " != " + b.ToString ("G99"));
Assert.IsTrue (double.IsNaN (Math.Cos (Double.NaN)));
Assert.IsTrue (double.IsNaN (Math.Cos (Double.NegativeInfinity)));
Assert.IsTrue (double.IsNaN (Math.Cos (Double.PositiveInfinity)));
}
[Test]
public void TestCosh ()
{
double a = Math.Cosh (x);
double b = 1.0076234465130722;
Assert.IsTrue ((Math.Abs (a - b) <= double_epsilon), a.ToString ("G99")
+ " != " + b.ToString ("G99"));
Assert.IsTrue (Math.Cosh (double.NegativeInfinity) == double.PositiveInfinity);
Assert.IsTrue (Math.Cosh (double.PositiveInfinity) == double.PositiveInfinity);
Assert.IsTrue (double.IsNaN (Math.Cosh (double.NaN)));
}
// The following test is for methods that are in ECMA but they are
// not implemented in MS.NET. I leave them commented.
/*
public void TestIntDivRem () {
int a = 5;
int b = 2;
int div = 0, rem = 0;
div = Math.DivRem (a, b, out rem);
Assert.IsTrue (rem == 1);
Assert.IsTrue (div == 2);
}
public void TestLongDivRem () {
long a = 5;
long b = 2;
long div = 0, rem = 0;
div = Math.DivRem (a, b, out rem);
Assert.IsTrue (rem == 1);
Assert.IsTrue (div == 2);
}
*/
[Test]
public void TestSin ()
{
double a = Math.Sin (x);
double b = 0.12308705821137626;
Assert.IsTrue ((Math.Abs (a - b) <= double_epsilon), a.ToString ("G99")
+ " != " + b.ToString ("G99"));
Assert.IsTrue (double.IsNaN (Math.Sin (Double.NaN)));
Assert.IsTrue (double.IsNaN (Math.Sin (Double.NegativeInfinity)));
Assert.IsTrue (double.IsNaN (Math.Sin (Double.PositiveInfinity)));
}
[Test]
public void TestSinh ()
{
double a = Math.Sinh (x);
double b = 0.12371341868561381;
Assert.IsTrue (Math.Abs (a - b) <= 0.0000000000000001, a.ToString ("G99")
+ " != " + b.ToString ("G99"));
Assert.IsTrue (double.IsNaN (Math.Sinh (Double.NaN)));
Assert.IsTrue (double.IsNegativeInfinity (Math.Sinh (Double.NegativeInfinity)));
Assert.IsTrue (double.IsPositiveInfinity (Math.Sinh (Double.PositiveInfinity)));
}
[Test]
public void TestTan ()
{
double a = Math.Tan (x);
double b = 0.12403019913793806;
Assert.IsTrue ((Math.Abs (a - b) <= double_epsilon), a.ToString ("G99")
+ " != " + b.ToString ("G99"));
Assert.IsTrue (Double.IsNaN (Math.Tan (Double.NaN)));
Assert.IsTrue (Double.IsNaN (Math.Tan (Double.PositiveInfinity)));
Assert.IsTrue (Double.IsNaN (Math.Tan (Double.NegativeInfinity)));
}
[Test]
public void TestTanh ()
{
double a = Math.Tanh (x);
double b = 0.12277743150353424;
Assert.IsTrue ((Math.Abs (a - b) <= double_epsilon), a.ToString ("G99")
+ " != " + b.ToString ("G99"));
Assert.IsTrue (Double.IsNaN (Math.Tanh (Double.NaN)),
"Tanh(NaN) should be NaN");
Assert.IsTrue (1 == Math.Tanh (Double.PositiveInfinity),
"Tanh(+Infinity) should be 1");
Assert.IsTrue (-1 == Math.Tanh (Double.NegativeInfinity),
"Tanh(-Infinity) should be -1");
}
[Test]
public void TestSqrt ()
{
double a = Math.Sqrt (x);
double b = 0.35128336140500593;
Assert.IsTrue ((Math.Abs (a - b) <= double_epsilon), a.ToString ("G99")
+ " != " + b.ToString ("G99"));
Assert.IsTrue (Double.IsNaN (Math.Sqrt (Double.NaN)));
Assert.IsTrue (Double.IsPositiveInfinity (Math.Sqrt (Double.PositiveInfinity)));
Assert.IsTrue (Double.IsNaN (Math.Sqrt (Double.NegativeInfinity)));
}
[Test]
public void TestExp ()
{
double a = Math.Exp (x);
double b = 1.1313368651986859;
Assert.IsTrue ((Math.Abs (a - b) <= double_epsilon), a.ToString ("G99")
+ " != " + b.ToString ("G99"));
Assert.IsTrue (double.IsNaN (Math.Exp (double.NaN)));
Assert.IsTrue (Math.Exp (double.NegativeInfinity) == 0);
Assert.IsTrue (Math.Exp (double.PositiveInfinity) == double.PositiveInfinity);
}
[Test]
public void TestCeiling ()
{
int iTest = 1;
try {
double a = Math.Ceiling (1.5);
double b = 2;
iTest++;
Assert.IsTrue ((Math.Abs (a - b) <= double_epsilon), a.ToString ("G99")
+ " != " + b.ToString ("G99"));
iTest++;
Assert.IsTrue (Math.Ceiling (double.NegativeInfinity) == double.NegativeInfinity);
iTest++;
Assert.IsTrue (Math.Ceiling (double.PositiveInfinity) == double.PositiveInfinity);
iTest++;
Assert.IsTrue (double.IsNaN (Math.Ceiling (double.NaN)));
iTest++;
Assert.IsTrue (Double.MaxValue == Math.Ceiling (Double.MaxValue));
iTest++;
Assert.IsTrue (Double.MinValue == Math.Ceiling (Double.MinValue));
} catch (Exception e) {
Assert.Fail ("Unexpected Exception at iTest=" + iTest + ": " + e);
}
}
[Test]
public void TestDecimalCeiling()
{
decimal a = Math.Ceiling(1.5M);
decimal b = 2M;
Assert.IsTrue (a == b, "#1");
Assert.IsTrue (Decimal.MaxValue == Math.Ceiling(Decimal.MaxValue), "#2");
Assert.IsTrue (Decimal.MinValue == Math.Ceiling(Decimal.MinValue), "#3");
}
[Test]
public void TestFloor ()
{
double a = Math.Floor (1.5);
double b = 1;
Assert.IsTrue ((Math.Abs (a - b) <= double_epsilon), a.ToString ("G99")
+ " != " + b.ToString ("G99"));
Assert.IsTrue (Math.Floor (double.NegativeInfinity) == double.NegativeInfinity);
Assert.IsTrue (Math.Floor (double.PositiveInfinity) == double.PositiveInfinity);
Assert.IsTrue (double.IsNaN (Math.Floor (double.NaN)));
Assert.IsTrue (Double.MaxValue == Math.Floor (Double.MaxValue));
Assert.IsTrue (Double.MinValue == Math.Floor (Double.MinValue));
}
[Test]
public void TestIEEERemainder ()
{
double a = Math.IEEERemainder (y, x);
double b = 0.0050000000000010592;
Assert.IsTrue ((Math.Abs (a - b) <= double_epsilon), a.ToString ("G99")
+ " != " + b.ToString ("G99"));
Assert.IsTrue (double.IsNaN (Math.IEEERemainder (y, 0)), "Positive 0");
// http://www.obtuse.com/resources/negative_zero.html
double n0 = BitConverter.Int64BitsToDouble (Int64.MinValue);
Assert.IsTrue (double.IsNaN (Math.IEEERemainder (n0, 0)), "Negative 0");
// the "zero" remainder of negative number is negative
long result = BitConverter.DoubleToInt64Bits (Math.IEEERemainder (-1, 1));
Assert.AreEqual (Int64.MinValue, result, "Negative Dividend");
}
[Test]
public void TestLog ()
{
double a = Math.Log (y);
double b = 2.513251122797143;
Assert.IsTrue ((Math.Abs (a - b) <= double_epsilon), a.ToString ("G99")
+ " != " + b.ToString ("G99"));
Assert.IsTrue (double.IsNaN (Math.Log (-1)));
Assert.IsTrue (double.IsNaN (Math.Log (double.NaN)));
// MS docs say this should be PositiveInfinity
Assert.IsTrue (Math.Log (0) == double.NegativeInfinity);
Assert.IsTrue (Math.Log (double.PositiveInfinity) == double.PositiveInfinity);
}
[Test]
public void TestLog2 ()
{
double a = Math.Log (x, y);
double b = -0.83251695325303621;
Assert.IsTrue ((Math.Abs (a - b) <= 1e-14), a + " != " + b
+ " because diff is " + Math.Abs (a - b));
Assert.IsTrue (double.IsNaN (Math.Log (-1, y)));
Assert.IsTrue (double.IsNaN (Math.Log (double.NaN, y)));
Assert.IsTrue (double.IsNaN (Math.Log (x, double.NaN)));
Assert.IsTrue (double.IsNaN (Math.Log (double.NegativeInfinity, y)));
Assert.IsTrue (double.IsNaN (Math.Log (x, double.NegativeInfinity)));
Assert.IsTrue (double.IsNaN (Math.Log (double.PositiveInfinity, double.PositiveInfinity)));
Assert.IsTrue (double.IsNaN (Math.Log (2, 1)));
// MS docs say this should be PositiveInfinity
Assert.IsTrue (Math.Log (0, y) == double.NegativeInfinity);
Assert.IsTrue (Math.Log (double.PositiveInfinity, y) == double.PositiveInfinity);
Assert.IsTrue (Double.IsNaN (Math.Log (x, double.PositiveInfinity)));
}
[Test]
public void TestLog10 ()
{
double a = Math.Log10 (x);
double b = -0.90868484030277719;
Assert.IsTrue ((Math.Abs (a - b) <= double_epsilon), a.ToString ("G99")
+ " != " + b.ToString ("G99"));
Assert.IsTrue (double.IsNaN (Math.Log10 (-1)));
Assert.IsTrue (double.IsNaN (Math.Log10 (double.NaN)));
// MS docs say this should be PositiveInfinity
Assert.IsTrue (Math.Log10 (0) == double.NegativeInfinity);
Assert.IsTrue (Math.Log10 (double.PositiveInfinity) == double.PositiveInfinity);
}
[Test]
public void TestPow ()
{
double precision;
#if MONODROID
// It fails on Nexus 9 with
//
// 1.3636094460602122 != 1.3636094460602119
//
// when using double_epsilon. Precision differs between different ARM CPUs, so we
// will just use a more conservative value
precision = double_epsilon * 10;
#else
precision = double_epsilon;
#endif
/* documentation cases : https://msdn.microsoft.com/en-us/library/system.math.pow%28v=vs.110%29.aspx */
/* x or y = NaN -> NaN */
Assert.IsTrue (double.IsNaN (Math.Pow ( double.NaN, double.NaN)), "#1");
Assert.IsTrue (double.IsNaN (Math.Pow ( double.NaN, double.NegativeInfinity)), "#2");
Assert.IsTrue (double.IsNaN (Math.Pow ( double.NaN, -2)), "#2");
Assert.IsTrue (double.IsNaN (Math.Pow ( double.NaN, -1)), "#3");
Assert.IsFalse (double.IsNaN (Math.Pow ( double.NaN, 0)), "#4");
Assert.IsTrue (double.IsNaN (Math.Pow ( double.NaN, 1)), "#5");
Assert.IsTrue (double.IsNaN (Math.Pow ( double.NaN, 2)), "#6");
Assert.IsTrue (double.IsNaN (Math.Pow ( double.NaN, double.PositiveInfinity)), "#7");
Assert.IsTrue (double.IsNaN (Math.Pow (double.NegativeInfinity, double.NaN)), "#8");
Assert.IsTrue (double.IsNaN (Math.Pow ( -2, double.NaN)), "#9");
Assert.IsTrue (double.IsNaN (Math.Pow ( -1, double.NaN)), "#10");
Assert.IsTrue (double.IsNaN (Math.Pow ( 0, double.NaN)), "#11");
Assert.IsFalse (double.IsNaN (Math.Pow ( 1, double.NaN)), "#12");
Assert.IsTrue (double.IsNaN (Math.Pow ( 2, double.NaN)), "#13");
Assert.IsTrue (double.IsNaN (Math.Pow (double.PositiveInfinity, double.NaN)), "#14");
/* x = Any value except NaN; y = 0 -> 1 */
Assert.AreEqual ((double) 1, Math.Pow (2, 0), "#15");
/* x = NegativeInfinity; y < 0 -> 0 */
Assert.AreEqual ((double) 0, Math.Pow (double.NegativeInfinity, -2), "#16");
/* x = NegativeInfinity; y is a positive odd integer -> NegativeInfinity */
Assert.AreEqual (double.NegativeInfinity, Math.Pow (double.NegativeInfinity, 3), "#17");
/* x = NegativeInfinity; y is positive but not an odd integer -> PositiveInfinity */
Assert.AreEqual (double.PositiveInfinity, Math.Pow (double.NegativeInfinity, 2), "#18");
/* x < 0 but not NegativeInfinity; y is not an integer, NegativeInfinity, or PositiveInfinity -> NaN */
Assert.IsTrue (double.IsNaN (Math.Pow (-1, 2.5)), "#19");
/* x = -1; y = NegativeInfinity or PositiveInfinity -> NaN */
Assert.IsFalse (double.IsNaN (Math.Pow (-1, double.PositiveInfinity)), "#20");
Assert.IsFalse (double.IsNaN (Math.Pow (-1, double.NegativeInfinity)), "#21");
/* -1 < x < 1; y = NegativeInfinity -> PositiveInfinity */
Assert.AreEqual (double.PositiveInfinity, Math.Pow (-0.5, double.NegativeInfinity), "#22");
Assert.AreEqual (double.PositiveInfinity, Math.Pow (+0.5, double.NegativeInfinity), "#23");
/* -1 < x < 1; y = PositiveInfinity -> 0 */
Assert.AreEqual ((double) 0, Math.Pow (-0.5, double.PositiveInfinity), "#24");
Assert.AreEqual ((double) 0, Math.Pow (+0.5, double.PositiveInfinity), "#25");
/* x < -1 or x > 1; y = NegativeInfinity -> 0 */
Assert.AreEqual ((double) 0, Math.Pow (-2, double.NegativeInfinity), "#26");
Assert.AreEqual ((double) 0, Math.Pow (+2, double.NegativeInfinity), "#27");
/* x < -1 or x > 1; y = PositiveInfinity -> PositiveInfinity */
Assert.AreEqual (double.PositiveInfinity, Math.Pow (-2, double.PositiveInfinity), "#28");
Assert.AreEqual (double.PositiveInfinity, Math.Pow (+2, double.PositiveInfinity), "#29");
/* x = 0; y < 0 -> PositiveInfinity */
Assert.AreEqual (double.PositiveInfinity, Math.Pow (0, -2), "#30");
/* x = 0; y > 0 -> PositiveInfinity */
Assert.AreEqual ((double) 0, Math.Pow (0, +2), "#31");
/* x = 1; y is any value except NaN -> 1 */
Assert.AreEqual ((double) 1, Math.Pow (1, double.NegativeInfinity), "#32");
Assert.AreEqual ((double) 1, Math.Pow (1, -2), "#33");
Assert.AreEqual ((double) 1, Math.Pow (1, 0), "#34");
Assert.AreEqual ((double) 1, Math.Pow (1, +2), "#35");
Assert.AreEqual ((double) 1, Math.Pow (1, double.PositiveInfinity), "#36");
/* x = PositiveInfinity; y < 0 -> 0 */
Assert.AreEqual ((double) 0, Math.Pow (double.PositiveInfinity, -1), "#37");
Assert.AreEqual ((double) 0, Math.Pow (double.PositiveInfinity, -2), "#38");
/* x = PositiveInfinity; y > 0 -> PositiveInfinity */
Assert.AreEqual (double.PositiveInfinity, Math.Pow (double.PositiveInfinity, 1), "#39");
Assert.AreEqual (double.PositiveInfinity, Math.Pow (double.PositiveInfinity, 2), "#40");
/* other cases */
double a = Math.Pow (y, x);
double b = 1.363609446060212;
Assert.IsTrue (Math.Abs (a - b) <= precision, "#41 " + a.ToString ("G99") + " != " + b.ToString ("G99") + " +/- " + precision.ToString ("G99"));
Assert.AreEqual (double.NegativeInfinity, Math.Pow (double.NegativeInfinity, 1), "#42");
Assert.AreEqual (double.PositiveInfinity, Math.Pow (double.NegativeInfinity, 2), "#43");
Assert.AreEqual (Math.Pow (double.PositiveInfinity, double.NegativeInfinity), (double) 0, "#44");
Assert.AreEqual ((double) 1, Math.Pow (-1, Double.MaxValue), "#45");
Assert.AreEqual ((double) 1, Math.Pow (-1, Double.MinValue), "#46");
Assert.AreEqual ((double) 0, Math.Pow (Double.MinValue, Double.MinValue), "#47");
Assert.AreEqual (double.PositiveInfinity, Math.Pow (Double.MinValue, Double.MaxValue), "#48");
double infinity = double.PositiveInfinity;
Assert.AreEqual ((double) 0, Math.Pow ( 0.5, infinity), "#49");
Assert.AreEqual ( infinity, Math.Pow ( 0.5, -infinity), "#50");
Assert.AreEqual ( infinity, Math.Pow ( 2, infinity), "#51");
Assert.AreEqual ((double) 0, Math.Pow ( 2, -infinity), "#52");
Assert.AreEqual ((double) 1, Math.Pow ( infinity, 0), "#53");
Assert.AreEqual ((double) 1, Math.Pow (-infinity, 0), "#54");
}
[Test]
public void TestByteMax ()
{
byte a = 1;
byte b = 2;
Assert.IsTrue (b == Math.Max (a, b), "#1");
Assert.IsTrue (b == Math.Max (b, a), "#2");
}
[Test]
public void TestDecimalMax ()
{
decimal a = 1.5M;
decimal b = 2.5M;
Assert.IsTrue (b == Math.Max (a, b), "#1");
Assert.IsTrue (b == Math.Max (b, a), "#2");
}
[Test]
public void TestDoubleMax ()
{
double a = 1.5D;
double b = 2.5D;
Assert.IsTrue (b == Math.Max (a, b), "#1");
Assert.IsTrue (b == Math.Max (b, a), "#2");
Assert.IsTrue (Double.IsNaN (Math.Max (Double.NaN, Double.NaN)), "#3");
Assert.IsTrue (Double.IsNaN (Math.Max (Double.NaN, a)), "#4");
Assert.IsTrue (Double.IsNaN (Math.Max (b, Double.NaN)), "#5");
}
[Test]
public void TestFloatMax ()
{
float a = 1.5F;
float b = 2.5F;
Assert.IsTrue (b == Math.Max (a, b), "#1");
Assert.IsTrue (b == Math.Max (b, a), "#2");
Assert.IsTrue (Single.IsNaN (Math.Max (Single.NaN, Single.NaN)), "#3");
Assert.IsTrue (Single.IsNaN (Math.Max (Single.NaN, a)), "#4");
Assert.IsTrue (Single.IsNaN (Math.Max (b, Single.NaN)), "#5");
}
[Test]
public void TestIntMax ()
{
int a = 1;
int b = 2;
int c = 100;
int d = -2147483647;
Assert.AreEqual (b, Math.Max (a, b), "#1");
Assert.AreEqual (b, Math.Max (b, a), "#2");
Assert.AreEqual (c, Math.Max (c, d), "#3");
Assert.AreEqual (c, Math.Max (d, c), "#4");
}
[Test]
public void TestLongMax ()
{
long a = 1L;
long b = 2L;
Assert.IsTrue (b == Math.Max (a, b), "#1");
Assert.IsTrue (b == Math.Max (b, a), "#2");
}
[Test]
public void TestSbyteMax ()
{
sbyte a = 1;
sbyte b = 2;
Assert.IsTrue (b == Math.Max (a, b), "#1");
Assert.IsTrue (b == Math.Max (b, a), "#2");
}
[Test]
public void TestShortMax ()
{
short a = 1;
short b = 2;
Assert.IsTrue (b == Math.Max (a, b), "#1");
Assert.IsTrue (b == Math.Max (b, a), "#2");
}
[Test]
public void TestUintMax ()
{
uint a = 1U;
uint b = 2U;
Assert.IsTrue (b == Math.Max (a, b), "#1");
Assert.IsTrue (b == Math.Max (b, a), "#2");
}
[Test]
public void TestUlongMax ()
{
ulong a = 1UL;
ulong b = 2UL;
Assert.IsTrue (b == Math.Max (a, b), "#1");
Assert.IsTrue (b == Math.Max (b, a), "#2");
}
[Test]
public void TestUshortMax ()
{
ushort a = 1;
ushort b = 2;
Assert.IsTrue (b == Math.Max (a, b), "#1");
Assert.IsTrue (b == Math.Max (b, a), "#2");
}
[Test]
public void TestByteMin ()
{
byte a = 1;
byte b = 2;
Assert.IsTrue (a == Math.Min (a, b), "#1");
Assert.IsTrue (a == Math.Min (b, a), "#2");
}
[Test]
public void TestDecimalMin ()
{
decimal a = 1.5M;
decimal b = 2.5M;
Assert.IsTrue (a == Math.Min (a, b), "#1");
Assert.IsTrue (a == Math.Min (b, a), "#2");
}
[Test]
public void TestDoubleMin ()
{
double a = 1.5D;
double b = 2.5D;
Assert.IsTrue (a == Math.Min (a, b), "#1");
Assert.IsTrue (a == Math.Min (b, a), "#2");
Assert.IsTrue (Double.IsNaN (Math.Min (Double.NaN, Double.NaN)), "#3");
Assert.IsTrue (Double.IsNaN (Math.Min (Double.NaN, a)), "#4");
Assert.IsTrue (Double.IsNaN (Math.Min (b, Double.NaN)), "#5");
}
[Test]
public void TestFloatMin ()
{
float a = 1.5F;
float b = 2.5F;
Assert.IsTrue (a == Math.Min (a, b), "#1");
Assert.IsTrue (a == Math.Min (b, a), "#2");
Assert.IsTrue (Single.IsNaN (Math.Min (Single.NaN, Single.NaN)), "#3");
Assert.IsTrue (Single.IsNaN (Math.Min (Single.NaN, a)), "#4");
Assert.IsTrue (Single.IsNaN (Math.Min (b, Single.NaN)), "#5");
}
[Test]
public void TestIntMin ()
{
int a = 1;
int b = 2;
Assert.IsTrue (a == Math.Min (a, b), "#1");
Assert.IsTrue (a == Math.Min (b, a), "#2");
}
[Test]
public void TestLongMin ()
{
long a = 1L;
long b = 2L;
Assert.IsTrue (a == Math.Min (a, b), "#1");
Assert.IsTrue (a == Math.Min (b, a), "#2");
}
[Test]
public void TestSbyteMin ()
{
sbyte a = 1;
sbyte b = 2;
Assert.IsTrue (a == Math.Min (a, b), "#1");
Assert.IsTrue (a == Math.Min (b, a), "#2");
}
[Test]
public void TestShortMin ()
{
short a = 1;
short b = 2;
Assert.IsTrue (a == Math.Min (a, b), "#1");
Assert.IsTrue (a == Math.Min (b, a), "#2");
}
[Test]
public void TestUintMin ()
{
uint a = 1U;
uint b = 2U;
Assert.IsTrue (a == Math.Min (a, b), "#1");
Assert.IsTrue (a == Math.Min (b, a), "#2");
}
[Test]
public void TestUlongMin ()
{
ulong a = 1UL;
ulong b = 2UL;
Assert.IsTrue (a == Math.Min (a, b), "#1");
Assert.IsTrue (a == Math.Min (b, a), "#2");
}
[Test]
public void TestUshortMin ()
{
ushort a = 1;
ushort b = 2;
Assert.IsTrue (a == Math.Min (a, b), "#1");
Assert.IsTrue (a == Math.Min (b, a), "#2");
}
[Test]
public void TestDecimalRound ()
{
decimal a = 1.5M;
decimal b = 2.5M;
Assert.IsTrue (Math.Round (a) == 2, "#1");
Assert.IsTrue (Math.Round (b) == 2, "#2");
Assert.IsTrue (Decimal.MaxValue == Math.Round (Decimal.MaxValue), "#3");
Assert.IsTrue (Decimal.MinValue == Math.Round (Decimal.MinValue), "#4");
}
[Test]
public void TestDecimalRound2 ()
{
decimal a = 3.45M;
decimal b = 3.46M;
Assert.AreEqual (3.4M, Math.Round (a, 1), "#1");
Assert.AreEqual (3.5M, Math.Round (b, 1), "#2");
}
[Test]
public void TestDoubleRound ()
{
double a = 1.5D;
double b = 2.5D;
double c = 0.5000000000000001; // https://github.com/mono/mono/issues/9989
Assert.AreEqual (2D, Math.Round (a), "#1");
Assert.AreEqual (2D, Math.Round (b), "#2");
Assert.AreEqual (1D, Math.Round (c), "#3");
Assert.IsTrue (Double.MaxValue == Math.Round (Double.MaxValue), "#4");
Assert.IsTrue (Double.MinValue == Math.Round (Double.MinValue), "#5");
}
[Test]
public void TestDoubleTruncate ()
{
double a = 1.2D;
double b = 2.8D;
double c = 0D;
Assert.AreEqual (1D, Math.Truncate (a), "#1");
Assert.AreEqual (2D, Math.Truncate (b), "#2");
Assert.AreEqual (-1D, Math.Truncate (a * -1D), "#3");
Assert.AreEqual (-2D, Math.Truncate (b * -1D), "#4");
Assert.AreEqual (0D, Math.Truncate (c), "#5");
Assert.IsTrue (Double.MaxValue == Math.Truncate (Double.MaxValue), "#6");
Assert.IsTrue (Double.MinValue == Math.Truncate (Double.MinValue), "#7");
}
[Test]
public void TestDecimalTruncate ()
{
decimal a = 1.2M;
decimal b = 2.8M;
decimal c = 0M;
Assert.AreEqual (1M, Math.Truncate (a), "#1");
Assert.AreEqual (2M, Math.Truncate (b), "#2");
Assert.AreEqual (-1M, Math.Truncate (a * -1M), "#3");
Assert.AreEqual (-2M, Math.Truncate (b * -1M), "#4");
Assert.AreEqual (0M, Math.Truncate (c), "#5");
Assert.IsTrue (Decimal.MaxValue == Math.Truncate (Decimal.MaxValue), "#6");
Assert.IsTrue (Decimal.MinValue == Math.Truncate (Decimal.MinValue), "#7");
}
[Test]
public void TestDoubleRound2 ()
{
double a = 3.45D;
double b = 3.46D;
Assert.AreEqual (3.4D, Math.Round (a, 1), "#1");
Assert.AreEqual (3.5D, Math.Round (b, 1), "#2");
Assert.AreEqual (-0.1, Math.Round (-0.123456789, 1), "#3");
}
[Test]
public void TestDoubleRound3 ()
{
Assert.AreEqual (1D, Math.Round (1D, 0, MidpointRounding.ToEven), "#1");
Assert.AreEqual (1D, Math.Round (1D, 0, MidpointRounding.AwayFromZero), "#2");
Assert.AreEqual (-1D, Math.Round (-1D, 0, MidpointRounding.ToEven), "#3");
Assert.AreEqual (-1D, Math.Round (-1D, 0, MidpointRounding.AwayFromZero), "#4");
Assert.AreEqual (1D, Math.Round (1D, 1, MidpointRounding.ToEven), "#5");
Assert.AreEqual (1D, Math.Round (1D, 1, MidpointRounding.AwayFromZero), "#6");
Assert.AreEqual (-1D, Math.Round (-1D, 1, MidpointRounding.ToEven), "#7");
Assert.AreEqual (-1D, Math.Round (-1D, 1, MidpointRounding.AwayFromZero), "#8");
Assert.AreEqual (1D, Math.Round (1.2345D, 0, MidpointRounding.ToEven), "#9");
Assert.AreEqual (1D, Math.Round (1.2345D, 0, MidpointRounding.AwayFromZero), "#A");
Assert.AreEqual (-1D, Math.Round (-1.2345D, 0, MidpointRounding.ToEven), "#B");
Assert.AreEqual (-1D, Math.Round (-1.2345D, 0, MidpointRounding.AwayFromZero), "#C");
Assert.AreEqual (1.2D, Math.Round (1.2345D, 1, MidpointRounding.ToEven), "#D");
Assert.AreEqual (1.2D, Math.Round (1.2345D, 1, MidpointRounding.AwayFromZero), "#E");
Assert.AreEqual (-1.2D, Math.Round (-1.2345D, 1, MidpointRounding.ToEven), "#F");
Assert.AreEqual (-1.2D, Math.Round (-1.2345D, 1, MidpointRounding.AwayFromZero), "#10");
Assert.AreEqual (1.23D, Math.Round (1.2345D, 2, MidpointRounding.ToEven), "#11");
Assert.AreEqual (1.23D, Math.Round (1.2345D, 2, MidpointRounding.AwayFromZero), "#12");
Assert.AreEqual (-1.23D, Math.Round (-1.2345D, 2, MidpointRounding.ToEven), "#13");
Assert.AreEqual (-1.23D, Math.Round (-1.2345D, 2, MidpointRounding.AwayFromZero), "#14");
Assert.AreEqual (1.234D, Math.Round (1.2345D, 3, MidpointRounding.ToEven), "#15");
Assert.AreEqual (1.235D, Math.Round (1.2345D, 3, MidpointRounding.AwayFromZero), "#16");
Assert.AreEqual (-1.234D, Math.Round (-1.2345D, 3, MidpointRounding.ToEven), "#17");
Assert.AreEqual (-1.235D, Math.Round (-1.2345D, 3, MidpointRounding.AwayFromZero), "#18");
Assert.AreEqual (1.2345D, Math.Round (1.2345D, 4, MidpointRounding.ToEven), "#19");
Assert.AreEqual (1.2345D, Math.Round (1.2345D, 4, MidpointRounding.AwayFromZero), "#1A");
Assert.AreEqual (-1.2345D, Math.Round (-1.2345D, 4, MidpointRounding.ToEven), "#1B");
Assert.AreEqual (-1.2345D, Math.Round (-1.2345D, 4, MidpointRounding.AwayFromZero), "#1C");
Assert.AreEqual (2D, Math.Round (1.5432D, 0, MidpointRounding.ToEven), "#1D");
Assert.AreEqual (2D, Math.Round (1.5432D, 0, MidpointRounding.AwayFromZero), "#1E");
Assert.AreEqual (-2D, Math.Round (-1.5432D, 0, MidpointRounding.ToEven), "#1F");
Assert.AreEqual (-2D, Math.Round (-1.5432D, 0, MidpointRounding.AwayFromZero), "#20");
Assert.AreEqual (1.5D, Math.Round (1.5432D, 1, MidpointRounding.ToEven), "#21");
Assert.AreEqual (1.5D, Math.Round (1.5432D, 1, MidpointRounding.AwayFromZero), "#22");
Assert.AreEqual (-1.5D, Math.Round (-1.5432D, 1, MidpointRounding.ToEven), "#23");
Assert.AreEqual (-1.5D, Math.Round (-1.5432D, 1, MidpointRounding.AwayFromZero), "#24");
Assert.AreEqual (1.54D, Math.Round (1.5432D, 2, MidpointRounding.ToEven), "#25");
Assert.AreEqual (1.54D, Math.Round (1.5432D, 2, MidpointRounding.AwayFromZero), "#26");
Assert.AreEqual (-1.54D, Math.Round (-1.5432D, 2, MidpointRounding.ToEven), "#27");
Assert.AreEqual (-1.54D, Math.Round (-1.5432D, 2, MidpointRounding.AwayFromZero), "#28");
Assert.AreEqual (1.543D, Math.Round (1.5432D, 3, MidpointRounding.ToEven), "#29");
Assert.AreEqual (1.543D, Math.Round (1.5432D, 3, MidpointRounding.AwayFromZero), "#2A");
Assert.AreEqual (-1.543D, Math.Round (-1.5432D, 3, MidpointRounding.ToEven), "#2B");
Assert.AreEqual (-1.543D, Math.Round (-1.5432D, 3, MidpointRounding.AwayFromZero), "#2C");
Assert.AreEqual (1.5432D, Math.Round (1.5432D, 4, MidpointRounding.ToEven), "#2D");
Assert.AreEqual (1.5432D, Math.Round (1.5432D, 4, MidpointRounding.AwayFromZero), "#2E");
Assert.AreEqual (-1.5432D, Math.Round (-1.5432D, 4, MidpointRounding.ToEven), "#2F");
Assert.AreEqual (-1.5432D, Math.Round (-1.5432D, 4, MidpointRounding.AwayFromZero), "#30");
Assert.AreEqual (63988D, Math.Round (63987.83593942D, 0, MidpointRounding.ToEven), "#31");
Assert.AreEqual (63988D, Math.Round (63987.83593942D, 0, MidpointRounding.AwayFromZero), "#32");
Assert.AreEqual (-63988D, Math.Round (-63987.83593942D, 0, MidpointRounding.ToEven), "#33");
Assert.AreEqual (-63988D, Math.Round (-63987.83593942D, 0, MidpointRounding.AwayFromZero), "#34");
Assert.AreEqual (63987.83594D, Math.Round (63987.83593942D, 5, MidpointRounding.ToEven), "#35");
Assert.AreEqual (63987.83594D, Math.Round (63987.83593942D, 5, MidpointRounding.AwayFromZero), "#36");
Assert.AreEqual (-63987.83594D, Math.Round (-63987.83593942D, 5, MidpointRounding.ToEven), "#37");
Assert.AreEqual (-63987.83594D, Math.Round (-63987.83593942D, 5, MidpointRounding.AwayFromZero), "#38");
Assert.AreEqual (63987.83593942D, Math.Round (63987.83593942D, 8, MidpointRounding.ToEven), "#39");
Assert.AreEqual (63987.83593942D, Math.Round (63987.83593942D, 8, MidpointRounding.AwayFromZero), "#3A");
Assert.AreEqual (-63987.83593942D, Math.Round (-63987.83593942D, 8, MidpointRounding.ToEven), "#3B");
Assert.AreEqual (-63987.83593942D, Math.Round (-63987.83593942D, 8, MidpointRounding.AwayFromZero), "#3C");
Assert.AreEqual (1, Math.Round (0.5, 0, MidpointRounding.AwayFromZero));
}
[Test]
public void TestDecimalSign ()
{
decimal a = -5M;
decimal b = 5M;
Assert.IsTrue (Math.Sign (a) == -1, "#1");
Assert.IsTrue (Math.Sign (b) == 1, "#2");
Assert.IsTrue (Math.Sign (0M) == 0, "#3");
}
[Test]
public void TestDoubleSign ()
{
double a = -5D;
double b = 5D;
Assert.IsTrue (Math.Sign (a) == -1, "#1");
Assert.IsTrue (Math.Sign (b) == 1, "#2");
Assert.IsTrue (Math.Sign (0D) == 0, "#3");
}
[Test]
public void TestFloatSign ()
{
float a = -5F;
float b = 5F;
Assert.IsTrue (Math.Sign (a) == -1, "#1");
Assert.IsTrue (Math.Sign (b) == 1, "#2");
Assert.IsTrue (Math.Sign (0F) == 0, "#3");
}
[Test]
public void TestIntSign ()
{
int a = -5;
int b = 5;
Assert.IsTrue (Math.Sign (a) == -1, "#1");
Assert.IsTrue (Math.Sign (b) == 1, "#2");
Assert.IsTrue (Math.Sign (0) == 0, "#3");
}
[Test]
public void TestLongSign ()
{
long a = -5L;
long b = 5L;
Assert.IsTrue (Math.Sign (a) == -1, "#1");
Assert.IsTrue (Math.Sign (b) == 1, "#2");
Assert.IsTrue (Math.Sign (0L) == 0, "#3");
}
[Test]
public void TestSbyteSign ()
{
sbyte a = -5;
sbyte b = 5;
Assert.IsTrue (Math.Sign (a) == -1, "#1");
Assert.IsTrue (Math.Sign (b) == 1, "#2");
Assert.IsTrue (Math.Sign (0) == 0, "#3");
}
[Test]
public void TestShortSign ()
{
short a = -5;
short b = 5;
Assert.IsTrue (Math.Sign (a) == -1, "#1");
Assert.IsTrue (Math.Sign (b) == 1, "#2");
Assert.IsTrue (Math.Sign (0) == 0, "#3");
}
}
}
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