public void TestItemsDiff()
{
List <ItemInfo> prev = null;
List <ItemInfo> curr = null;
Tuple <List <ItemInfo>, List <ItemInfo> > res = null;
// nothing old, nothing new (null version)
res = DiffUtil.ItemsDiff(curr, prev);
Assert.IsNull(res.Item1);
Assert.IsNull(res.Item2);
// nothing old, nothing new (empty list version)
prev = new List <ItemInfo>();
curr = new List <ItemInfo>();
res = DiffUtil.ItemsDiff(curr, prev);
Assert.IsNull(res.Item1);
Assert.IsNull(res.Item2);
// nothing old, one new
// -> nothing removed, one added
curr = new List <ItemInfo>
{
new ItemInfo {
GUID = 1, Class = 1
},
};
res = DiffUtil.ItemsDiff(curr, prev);
Assert.IsNull(res.Item2);
CollectionAssert.AreEquivalent(curr, res.Item1);
// one old, one new
// -> nothing removed, one added
prev = new List <ItemInfo>
{
new ItemInfo {
GUID = 1, Class = 1
},
};
curr = new List <ItemInfo>
{
new ItemInfo {
GUID = 1, Class = 1
},
new ItemInfo {
GUID = 2, Class = 2
},
};
res = DiffUtil.ItemsDiff(curr, prev);
Assert.IsNull(res.Item2);
Assert.AreEqual(1, res.Item1.Count);
Assert.IsTrue(ItemInfo.AreEqual(curr[1], res.Item1[0]));
// one old, one new
// -> one removed, one added
prev = new List <ItemInfo>
{
new ItemInfo {
GUID = 1, Class = 1
},
};
curr = new List <ItemInfo>
{
new ItemInfo {
GUID = 2, Class = 2
},
};
res = DiffUtil.ItemsDiff(curr, prev);
CollectionAssert.AreEquivalent(curr, res.Item1);
CollectionAssert.AreEquivalent(prev, res.Item2);
// one old, nothing new
// -> one removed, nothing added
prev = new List <ItemInfo>
{
new ItemInfo {
GUID = 1, Class = 1
},
};
curr = new List <ItemInfo>
{
};
res = DiffUtil.ItemsDiff(curr, prev);
Assert.IsNull(res.Item1);
CollectionAssert.AreEquivalent(prev, res.Item2);
}