public void AddValueOrUpdateTest()
{
var dictionary = new Dictionary <int, int> {
{ 1, 2 }
};
dictionary.Count.ShouldBe(1);
dictionary[1].ShouldBe(2);
Dicts.AddValueOrUpdate(dictionary, 1, k => 200, (k, v) => v * 111);
dictionary.Count.ShouldBe(1);
dictionary[1].ShouldBe(222);
Dicts.AddValueOrUpdate(dictionary, 2, k => 200, (k, v) => v * 111);
dictionary.Count.ShouldBe(2);
dictionary[1].ShouldBe(222);
dictionary[2].ShouldBe(200);
dictionary.AddValueOrUpdate(2, k => 200, (k, v) => v * 111);
dictionary.AddValueOrUpdate(3, k => 300, (k, v) => v * 111);
dictionary.Count.ShouldBe(3);
dictionary[1].ShouldBe(222);
dictionary[2].ShouldBe(22200);
dictionary[3].ShouldBe(300);
}
