public void Contains_Invoke_ReturnsExpected(IEqualityComparer <string> comparer, string key, bool expected)
{
var collection = new StringKeyedCollection <string>(comparer, 3);
collection.GetKeyForItemHandler = item => item + "_key";
// Without dictionary.
collection.InsertItem(0, "first");
Assert.Equal(expected, collection.Contains(key));
// With dictionary.
collection.InsertItem(0, "second");
collection.InsertItem(0, "third");
collection.InsertItem(0, "fourth");
Assert.Equal(expected, collection.Contains(key));
}
public void Contains_NullKeyForItemResult_Success(int dictionaryCreationThreshold, bool expected)
{
var collection = new StringKeyedCollection <int>(null, dictionaryCreationThreshold);
collection.GetKeyForItemHandler = i => i.ToString();
collection.Add(1);
collection.Add(2);
collection.Add(3);
collection.Add(4);
// Don't get even numbers.
collection.GetKeyForItemHandler = i => i % 2 == 0 ? null : i.ToString();
// Get null key.
Assert.Equal(expected, collection.Contains("2"));
// Get non null key.
Assert.True(collection.Contains("1"));
}
public void Contains_DifferentKeyForItemResult_Success(int dictionaryCreationThreshold, bool expected)
{
var collection = new StringKeyedCollection <int>(null, dictionaryCreationThreshold);
collection.GetKeyForItemHandler = i => i.ToString();
collection.Add(1);
collection.Add(2);
collection.Add(3);
collection.Add(4);
collection.GetKeyForItemHandler = i => (i * 2).ToString();
Assert.Equal(expected, collection.Contains("6"));
}
public void Contains_NullKey_ThrowsArgumentNullException()
{
var collection = new StringKeyedCollection <string>();
AssertExtensions.Throws <ArgumentNullException>("key", () => collection.Contains(null));
}
