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// Copyright (c) Microsoft Corporation. All rights reserved. See License.txt in the project root for license information.
using Xunit;
namespace System.Web.Mvc.Test
{
public class ViewDataInfoTest
{
[Fact]
public void ViewDataInfoDoesNotCallAccessorUntilValuePropertyAccessed()
{
// Arrange
bool called = false;
ViewDataInfo vdi = new ViewDataInfo(() =>
{
called = true;
return 21;
});
// Act & Assert
Assert.False(called);
object result = vdi.Value;
Assert.True(called);
Assert.Equal(21, result);
}
[Fact]
public void AccessorIsOnlyCalledOnce()
{
// Arrange
int callCount = 0;
ViewDataInfo vdi = new ViewDataInfo(() =>
{
++callCount;
return null;
});
// Act & Assert
Assert.Equal(0, callCount);
object unused;
unused = vdi.Value;
unused = vdi.Value;
unused = vdi.Value;
Assert.Equal(1, callCount);
}
[Fact]
public void SettingExplicitValueOverridesAccessorMethod()
{
// Arrange
bool called = false;
ViewDataInfo vdi = new ViewDataInfo(() =>
{
called = true;
return null;
});
// Act & Assert
Assert.False(called);
vdi.Value = 42;
object result = vdi.Value;
Assert.False(called);
Assert.Equal(42, result);
}
}
}
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