public void AddingPrioritylessItemToEmptyCollectionDoesNotThrowAnException()
{
// arrange
var unprioritizedDummy = PriorityItemHelper.CreatePriorityMock(null);
unprioritizedDummy.SetupAllProperties();
var sut = new PriorityCollection <IPriorityItem>();
var act = new Action(() => sut.TryAdd(unprioritizedDummy.Object));
// act
// assert
act.Should().NotThrow <InvalidOperationException>();
}
public void AddingSingleItemToCollectionWorksCorrectly()
{
// arrange
var itemDummy = PriorityItemHelper.CreatePriorityMock(1);
var sut = new PriorityCollection <IPriorityItem>();
// act
var result = sut.TryAdd(itemDummy.Object);
// assert
result.Should().BeTrue();
sut.AsEnumerable().First().Should().Be(itemDummy.Object);
}
public void AddingSecondItemToCollectionAddsItInTheCorrectPosition()
{
// arrange
var itemDummy = PriorityItemHelper.CreatePriorityMock(1);
var higherPriorityDummy = PriorityItemHelper.CreatePriorityMock(0);
var sut = new PriorityCollection <IPriorityItem>();
sut.TryAdd(itemDummy.Object);
// act
var result = sut.TryAdd(higherPriorityDummy.Object);
// assert
result.Should().BeTrue();
sut.AsEnumerable().First().Should().Be(higherPriorityDummy.Object);
}
public void IndexOutOfRangeIsCheckedCorrectly()
{
// arrange
var itemDummy = PriorityItemHelper.CreatePriorityMock(1);
var higherPriorityDummy = PriorityItemHelper.CreatePriorityMock(0);
var arr = new IPriorityItem[1];
var sut = new PriorityCollection <IPriorityItem>();
sut.TryAdd(itemDummy.Object);
sut.TryAdd(higherPriorityDummy.Object);
var act = new Action(() => sut.CopyTo(arr, -1));
// act
// assert
act.Should().Throw <ArgumentOutOfRangeException>();
}
public void ArraySizeIsCheckedCorrectlyForCopying()
{
// arrange
var itemDummy = PriorityItemHelper.CreatePriorityMock(1);
var higherPriorityDummy = PriorityItemHelper.CreatePriorityMock(0);
var arr = new IPriorityItem[1];
var sut = new PriorityCollection <IPriorityItem>();
sut.TryAdd(itemDummy.Object);
sut.TryAdd(higherPriorityDummy.Object);
var act = new Action(() => sut.CopyTo(arr, 0));
// act
// assert
act.Should().Throw <ArgumentException>("Target array is too small to copy items");
}
public void ToArrayCopiesItemsInCollectionToANewArray()
{
// arrange
var itemDummy = PriorityItemHelper.CreatePriorityMock(1);
var higherPriorityDummy = PriorityItemHelper.CreatePriorityMock(0);
var sut = new PriorityCollection <IPriorityItem>();
sut.TryAdd(itemDummy.Object);
sut.TryAdd(higherPriorityDummy.Object);
// act
var array = sut.ToArray();
// assert
array.Length.Should().Be(2);
array.First().Should().Be(higherPriorityDummy.Object);
}
public void CastingToIEnumerableAndEnumeratingTheCollectionWorksCorrectly()
{
// arrange
var itemDummy = PriorityItemHelper.CreatePriorityMock(1);
var higherPriorityDummy = PriorityItemHelper.CreatePriorityMock(0);
var sut = new PriorityCollection <IPriorityItem>();
sut.TryAdd(itemDummy.Object);
sut.TryAdd(higherPriorityDummy.Object);
// act
var enumerator = ((IEnumerable)sut).GetEnumerator();
// assert
enumerator.MoveNext();
enumerator.Current.Should().Be(higherPriorityDummy.Object);
}
public void TakingAnItemFromTheCollectionCorrectlyDetachesItsEvent()
{
// arrange
var itemDummy = PriorityItemHelper.CreatePriorityMock(1);
var sut = new PriorityCollection <IPriorityItem>();
sut.TryAdd(itemDummy.Object);
IPriorityItem item;
sut.TryTake(out item);
// act
itemDummy.Raise(t => t.PriorityChanged += null, new EventArgs());
// assert
sut.Count.Should().Be(0);
}
public void AddingPrioritylessItemWillAddItToTheEndOfTheCollection()
{
// arrange
var itemDummy = PriorityItemHelper.CreatePriorityMock(1);
var unprioritizedDummy = PriorityItemHelper.CreatePriorityMock(null);
unprioritizedDummy.SetupAllProperties();
var sut = new PriorityCollection <IPriorityItem>();
sut.TryAdd(itemDummy.Object);
// act
var result = sut.TryAdd(unprioritizedDummy.Object);
// assert
result.Should().BeTrue();
sut.AsEnumerable().Last().Should().Be(unprioritizedDummy.Object);
unprioritizedDummy.Object.Priority.Should().Be(1);
}
public void TakingAnItemFromTheCollectionAlwaysReturnsTheItemWithTheHighestPriority()
{
// arrange
var itemDummy = PriorityItemHelper.CreatePriorityMock(1);
var higherPriorityDummy = PriorityItemHelper.CreatePriorityMock(0);
var sut = new PriorityCollection <IPriorityItem>();
sut.TryAdd(itemDummy.Object);
sut.TryAdd(higherPriorityDummy.Object);
IPriorityItem retrievedItem;
// act
var result = sut.TryTake(out retrievedItem);
// assert
result.Should().BeTrue();
retrievedItem.Should().Be(higherPriorityDummy.Object);
}
public void AdjustingItemPriorityMovesTheItemToTheCorrectLocation()
{
// arrange
var itemDummy = PriorityItemHelper.CreatePriorityMock(1);
var higherPriorityDummy = PriorityItemHelper.CreatePriorityMock(0);
var sut = new PriorityCollection <IPriorityItem>();
sut.TryAdd(itemDummy.Object);
sut.TryAdd(higherPriorityDummy.Object);
higherPriorityDummy
.Setup(t => t.Priority)
.Returns(2);
// act
higherPriorityDummy.Raise(t => t.PriorityChanged += null, new EventArgs());
// assert
sut.AsEnumerable().Last().Should().Be(higherPriorityDummy.Object);
}
public void EnumeratingCollectionWorksCorrectly()
{
// arrange
var itemDummy = PriorityItemHelper.CreatePriorityMock(1);
var higherPriorityDummy = PriorityItemHelper.CreatePriorityMock(0);
var sut = new PriorityCollection <IPriorityItem>();
sut.TryAdd(itemDummy.Object);
sut.TryAdd(higherPriorityDummy.Object);
// act
// assert
var counter = 0;
foreach (var item in sut)
{
item
.Should()
.Be(counter == 0 ? higherPriorityDummy.Object : itemDummy.Object);
counter++;
}
}
public void CopyingToArrayWorksCorrectly(int startIndex)
{
// arrange
var itemDummy = PriorityItemHelper.CreatePriorityMock(1);
var higherPriorityDummy = PriorityItemHelper.CreatePriorityMock(0);
var arr = new IPriorityItem[3];
var sut = new PriorityCollection <IPriorityItem>();
sut.TryAdd(itemDummy.Object);
sut.TryAdd(higherPriorityDummy.Object);
// act
sut.CopyTo(arr, startIndex);
// assert
for (var r = 0; r < startIndex; r++)
{
arr[r].Should().BeNull();
}
arr[startIndex].Should().Be(higherPriorityDummy.Object);
arr[startIndex + 1].Should().Be(itemDummy.Object);
}