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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);
}
}
}
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