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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.Async.Test
{
public class OperationCounterTest
{
[Fact]
public void CompletedEvent()
{
// Arrange
bool premature = true;
bool eventFired = false;
OperationCounter ops = new OperationCounter();
ops.Completed += (sender, eventArgs) =>
{
if (premature)
{
Assert.True(false, "Event fired too early!");
}
if (eventFired)
{
Assert.True(false, "Event fired multiple times.");
}
Assert.Equal(ops, sender);
Assert.Equal(eventArgs, EventArgs.Empty);
eventFired = true;
};
// Act & assert
ops.Increment(); // should not fire event (will throw exception)
premature = false;
ops.Decrement(); // should fire event
Assert.True(eventFired);
ops.Increment(); // should not fire event (will throw exception)
}
[Fact]
public void CountStartsAtZero()
{
// Arrange
OperationCounter ops = new OperationCounter();
// Act & assert
Assert.Equal(0, ops.Count);
}
[Fact]
public void DecrementWithIntegerArgument()
{
// Arrange
OperationCounter ops = new OperationCounter();
// Act
int returned = ops.Decrement(3);
int newCount = ops.Count;
// Assert
Assert.Equal(-3, returned);
Assert.Equal(-3, newCount);
}
[Fact]
public void DecrementWithNoArguments()
{
// Arrange
OperationCounter ops = new OperationCounter();
// Act
int returned = ops.Decrement();
int newCount = ops.Count;
// Assert
Assert.Equal(-1, returned);
Assert.Equal(-1, newCount);
}
[Fact]
public void IncrementWithIntegerArgument()
{
// Arrange
OperationCounter ops = new OperationCounter();
// Act
int returned = ops.Increment(3);
int newCount = ops.Count;
// Assert
Assert.Equal(3, returned);
Assert.Equal(3, newCount);
}
[Fact]
public void IncrementWithNoArguments()
{
// Arrange
OperationCounter ops = new OperationCounter();
// Act
int returned = ops.Increment();
int newCount = ops.Count;
// Assert
Assert.Equal(1, returned);
Assert.Equal(1, newCount);
}
}
}
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