1 files changed, 112 insertions, 0 deletions
diff --git a/Xamarin.Forms.Core.UnitTests/SliderUnitTests.cs b/Xamarin.Forms.Core.UnitTests/SliderUnitTests.cs
new file mode 100644
index 00000000..22ad75ba
--- /dev/null
+++ b/Xamarin.Forms.Core.UnitTests/SliderUnitTests.cs
@@ -0,0 +1,112 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+
+using NUnit.Framework;
+
+namespace Xamarin.Forms.Core.UnitTests
+{
+	[TestFixture]
+	public class SliderUnitTests : BaseTestFixture
+	{
+		[Test]
+		public void TestConstructor ()
+		{
+			var slider = new Slider (20, 200, 50);
+
+			Assert.AreEqual (20, slider.Minimum);
+			Assert.AreEqual (200, slider.Maximum);
+			Assert.AreEqual (50, slider.Value);
+		}
+
+		[Test]
+		public void TestInvalidConstructor ()
+		{
+			Assert.Throws<ArgumentOutOfRangeException> (() => new Slider (10, 5, 10));
+		}
+
+		[Test]
+		public void TestConstructorClamping ()
+		{
+			Slider slider = new Slider (50, 100, 0);
+
+			Assert.AreEqual (50, slider.Value);
+		}
+
+		[Test]
+		public void TestMinValueClamp ()
+		{
+			Slider slider = new Slider (0, 100, 0);
+
+			slider.Minimum = 10;
+
+			Assert.AreEqual (10, slider.Value);
+			Assert.AreEqual (10, slider.Minimum);
+		}
+
+		[Test]
+		public void TestMaxValueClamp ()
+		{
+			Slider slider = new Slider (0, 100, 100);
+			
+			slider.Maximum = 10;
+			
+			Assert.AreEqual (10, slider.Value);
+			Assert.AreEqual (10, slider.Maximum);
+		}
+
+		[Test]
+		public void TestInvalidMaxValue ()
+		{
+			var slider = new Slider ();
+			Assert.Throws<ArgumentException> (() => slider.Maximum = slider.Minimum - 1);
+		}
+
+		[Test]
+		public void TestInvalidMinValue ()
+		{
+			var slider = new Slider ();
+			Assert.Throws<ArgumentException> (() => slider.Minimum = slider.Maximum + 1);
+		}
+
+		[Test]
+		public void TestValueChanged ()
+		{
+			var slider = new Slider ();
+			var changed = false;
+
+			slider.ValueChanged += (sender, arg) => changed = true;
+
+			slider.Value += 1;
+
+			Assert.True (changed);
+		}
+
+		[TestCase (0.0, 1.0)]
+		[TestCase (1.0, 0.5)]
+		public void SliderValueChangedEventArgs (double initialValue, double finalValue)
+		{
+			var slider = new Slider {
+				Minimum = 0.0,
+				Maximum = 1.0,
+				Value = initialValue
+			};
+
+			Slider sliderFromSender = null;
+			double oldValue = 0.0;
+			double newValue = 0.0;
+
+			slider.ValueChanged += (s, e) => {
+				sliderFromSender = (Slider)s;
+				oldValue = e.OldValue;
+				newValue = e.NewValue;
+			};
+
+			slider.Value = finalValue;
+
+			Assert.AreEqual (slider, sliderFromSender);
+			Assert.AreEqual (initialValue, oldValue);
+			Assert.AreEqual (finalValue, newValue);
+		}
+	}	
+}