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MLEM/Tests/DirectionTests.cs

65 lines
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2.5 KiB
C#

using Microsoft.Xna.Framework;
using MLEM.Misc;
using NUnit.Framework;
using static MLEM.Misc.Direction2;
namespace Tests {
public class DirectionTests {
[Test]
public void TestDirections() {
Assert.AreEqual(new Vector2(0.5F, 0.5F).ToDirection(), DownRight);
Assert.AreEqual(new Vector2(0.25F, 0.5F).ToDirection(), DownRight);
Assert.AreEqual(new Vector2(0.15F, 0.5F).ToDirection(), Down);
}
[Test]
public void Test90Directions() {
Assert.AreEqual(new Vector2(0.75F, 0.5F).To90Direction(), Right);
Assert.AreEqual(new Vector2(0.5F, 0.5F).To90Direction(), Down);
Assert.AreEqual(new Vector2(0.25F, 0.5F).To90Direction(), Down);
}
[Test]
public void TestRotations() {
// rotate cw
Assert.AreEqual(Up.RotateCw(), Right);
Assert.AreEqual(Up.RotateCw(true), UpRight);
Assert.AreEqual(Left.RotateCw(), Up);
Assert.AreEqual(UpLeft.RotateCw(), UpRight);
// rotate ccw
Assert.AreEqual(Up.RotateCcw(), Left);
Assert.AreEqual(Up.RotateCcw(true), UpLeft);
Assert.AreEqual(Left.RotateCcw(), Down);
Assert.AreEqual(UpLeft.RotateCcw(), DownLeft);
// rotate 360 degrees
foreach (var dir in Direction2Helper.AllExceptNone) {
Assert.AreEqual(RotateMultipleTimes(dir, true, false, 4), dir);
Assert.AreEqual(RotateMultipleTimes(dir, true, true, 8), dir);
Assert.AreEqual(RotateMultipleTimes(dir, false, false, 4), dir);
Assert.AreEqual(RotateMultipleTimes(dir, false, true, 8), dir);
}
// rotate by with start Up
Assert.AreEqual(Right.RotateBy(Right), Down);
Assert.AreEqual(Right.RotateBy(Down), Left);
Assert.AreEqual(Right.RotateBy(Left), Up);
Assert.AreEqual(Right.RotateBy(Up), Right);
// rotate by with start Left
Assert.AreEqual(Up.RotateBy(Right, Left), Down);
Assert.AreEqual(Up.RotateBy(Down, Left), Left);
Assert.AreEqual(Up.RotateBy(Left, Left), Up);
Assert.AreEqual(Up.RotateBy(Up, Left), Right);
}
private static Direction2 RotateMultipleTimes(Direction2 dir, bool clockwise, bool fortyFiveDegrees, int times) {
for (var i = 0; i < times; i++)
dir = clockwise ? dir.RotateCw(fortyFiveDegrees) : dir.RotateCcw(fortyFiveDegrees);
return dir;
}
}
}