98 lines
3.5 KiB
C#
98 lines
3.5 KiB
C#
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// Copyright (c) 2010-2014 SharpDX - Alexandre Mutel
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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using System.Runtime.InteropServices;
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using NUnit.Framework;
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using SharpDX.Mathematics;
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namespace SharpDX.Tests
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{
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[TestFixture]
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public class MathUtilNearEqualTests
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{
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// 0x4783809e 0x4783809f (1 ulp)
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[TestCase(67329.234f, 67329.242f, true)]
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// 0x4783809e 0x478380A0 (2 ulp)
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[TestCase(67329.234f, 67329.25f, true)]
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// 0x4783809e 0x478380A1 (3 ulp)
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[TestCase(67329.234f, 67329.257812f, true)]
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// 0x4783809e 0x478380A2 (4 ulp)
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[TestCase(67329.234f, 67329.265625f, true)]
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// 0x4783809e 0x478380A3 (5 ulp)
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[TestCase(67329.234f, 67329.273438f, false)] // should fail. MathUtil.NearEqual is expecting a max ulp of 4
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[TestCase(1f, 1f, true)]
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[TestCase(0f, 1f, false)]
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[TestCase(-1f, 1f, false)]
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[TestCase(-2f, 1f, false)]
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[TestCase(-3f, 1f, false)]
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[TestCase(-4f, 1f, false)]
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[TestCase(0f, 0f, true)]
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[TestCase(5f, 4f, false)]
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[TestCase(4f, 4f, true)]
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[TestCase(3f, 4f, false)]
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[TestCase(2f, 4f, false)]
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[TestCase(1f, 4f, false)]
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[TestCase(0f, 4f, false)]
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[TestCase(-1f, 4f, false)] // this case produces int.MinValue for ulp
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[TestCase(-1f, 5f, false)]
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[TestCase(-1f, -4f, false)]
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//Float Hexadecimal Decimal
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//1.99999976 0x3FFFFFFE 1073741822
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//1.99999988 0x3FFFFFFF 1073741823
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//2 0x40000000 1073741824
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//2.00000024 0x40000001 1073741825
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//2.00000048 0x40000002 1073741826
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[TestCase(2.00000000f, 2.00000024f, true)]
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[TestCase(1.99999976f, 2.00000048f, true)]
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public void ShouldReturnCorrectResult(float a, float b, bool expectedResult)
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{
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var result = MathUtil.NearEqual(a, b);
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Assert.AreEqual(expectedResult, result, string.Format("NearEqual({0}, {1}) should be {2}, but was {3}", a, b, expectedResult, result));
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}
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//[StructLayout(LayoutKind.Explicit)]
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//struct Floater
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//{
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// public Floater(float a)
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// : this()
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// {
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// this.a = a;
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// }
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// public Floater(uint aInt)
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// : this()
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// {
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// this.aInt = aInt;
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// }
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// [FieldOffset(0)]
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// public float a;
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// [FieldOffset(0)]
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// public uint aInt;
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//}
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}
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}
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