public void TryAddRangeAddsNonExistingNewItems(int amountOfItemsToAdd)
{
// given
var keyValuePairs = Enumerable.Range(0, amountOfItemsToAdd)
.Select(i => new KeyValuePair<int, string>(i, $"#{i}"))
.ToList();
using (var observableDictionary = new ObservableDictionary<int, string>())
{
// when
IDictionary<int, string> nonAddedKeyValuePairs;
var tryAddResult = observableDictionary.TryAddRange(keyValuePairs, out nonAddedKeyValuePairs);
// then check whether all items have been accounted for
tryAddResult.Should().Be(true);
nonAddedKeyValuePairs.Should().NotBeNull();
nonAddedKeyValuePairs.Should().BeEmpty();
observableDictionary.Count.Should().Be(amountOfItemsToAdd);
foreach (var keyValuePair in keyValuePairs)
{
observableDictionary.Should().Contain(keyValuePair);
}
}
}
public void TryAddRangeAddsNonExistingItemsAndReportsNonAddedBack(int amountOfInitialItems, int amountOfItemsToAdd)
{
// given
var initialKeyValuePairs = Enumerable.Range(0, amountOfInitialItems)
.Select(i => new KeyValuePair<int, string>(i, $"#{i}"))
.ToList();
var keyValuePairsToAdd = Enumerable.Range(0, amountOfItemsToAdd)
.Select(i => new KeyValuePair<int, string>(i, $"#{i}"))
.ToList();
using (var observableDictionary = new ObservableDictionary<int, string>(initialKeyValuePairs))
{
// when
IDictionary<int, string> itemsThatCouldNotBeAdded;
var tryAddResult = observableDictionary.TryAddRange(keyValuePairsToAdd, out itemsThatCouldNotBeAdded);
// then check whether all items have been accounted for
tryAddResult.Should().Be(false);
itemsThatCouldNotBeAdded.Should().NotBeNull();
itemsThatCouldNotBeAdded.Should().NotBeEmpty();
observableDictionary.Count.Should().Be(amountOfInitialItems + amountOfItemsToAdd - itemsThatCouldNotBeAdded.Count);
foreach (var keyValuePair in keyValuePairsToAdd.Except(itemsThatCouldNotBeAdded))
{
observableDictionary.Should().Contain(keyValuePair);
}
foreach (var keyValuePair in initialKeyValuePairs.Intersect(keyValuePairsToAdd))
{
itemsThatCouldNotBeAdded.Should().Contain(keyValuePair);
}
}
}
