public void MustRemoveFromBackWhenOnlyOneItemIsInList()
{
LinkedList<int> sut = new LinkedList<int>();
sut.PushBack(1);
Assert.Equal(1, sut.Back());
Assert.Equal(1, sut.Front());
Assert.Equal(1, sut.Count);
sut.RemoveBack();
Assert.Equal(0, sut.Count);
Assert.Throws<InvalidOperationException>(() => sut.Front());
Assert.Throws<InvalidOperationException>(() => sut.Back());
}
public void MustThrowWhenNoElementsExist()
{
var sut = new LinkedList<bool>();
var exception = Assert.Throws<InvalidOperationException>(() => sut.RemoveBack());
Assert.Equal("There are no elements to remove", exception.Message);
}
public void MustRemoveFromBack()
{
LinkedList<int> sut = new LinkedList<int>();
sut.PushBack(1);
Assert.Equal(1, sut.Back());
Assert.Equal(1, sut.Front());
Assert.Equal(1, sut.Count);
sut.PushFront(2);
Assert.Equal(1, sut.Back());
Assert.Equal(2, sut.Front());
Assert.Equal(2, sut.Count);
sut.PushBack(3);
Assert.Equal(3, sut.Back());
Assert.Equal(2, sut.Front());
Assert.Equal(3, sut.Count);
sut.RemoveBack();
Assert.Equal(1, sut.Back());
Assert.Equal(2, sut.Front());
Assert.Equal(2, sut.Count);
}
