public void ContainsTest()
{
var dict = new LRUCacheDictionary<string, string>
{
["key1"] = "value1",
["key2"] = "value2",
["key3"] = "value3",
};
Assert.True(dict.Contains(new KeyValuePair<string, string>("key1", "value1")));
Assert.False(dict.Contains(new KeyValuePair<string, string>("key3", "value2")));
Assert.False(dict.Contains(new KeyValuePair<string, string>("value3", "key3")));
Assert.False(dict.Contains(new KeyValuePair<string, string>("hogehoge", "hogehoge")));
}