public static void TestAdd()
{
DualKeyDictionary <int, int, string> dict = new DualKeyDictionary <int, int, string>();
dict.Add(0, 0, "0,0");
dict.Add(0, 1, "0,1");
dict.Add(1, 0, "1,0");
dict.Add(1, 1, "1,1");
Assert.AreEqual(dict.Count, 4);
Assert.IsTrue(dict.ContainsKey(1, 1));
Assert.AreEqual(dict[1, 1], "1,1");
}
/// <summary>
/// Given a DualKeyDictionary with a key pair of type ( <typeparamref name="T1" />,
/// <typeparamref name="T2"></typeparamref>), which maps to a value that is an enumeration over elements of type
/// <typeparamref name="T4" />, return true iff there is an key entry consisting of the pair (
/// <paramref name="keyPart1" />, <paramref name="keyPart2" />) that has a non-null and non-empty key.
/// </summary>
/// <typeparam name="T1">The type of the first element of the paired key</typeparam>
/// <typeparam name="T2">The type of the second element of the paired key.</typeparam>
/// <typeparam name="T3">The type of the enumeration that is the value of the dictionary.</typeparam>
/// <typeparam name="T4">The type of the elements inside the enumeration value.</typeparam>
/// <param name="dict">The dual-key dictionary that we're checking for a key pair (with a nonempty and nonnull value)</param>
/// <param name="keyPart1">The first item of the paired key.</param>
/// <param name="keyPart2">The second item of the paired key.</param>
/// <returns>
/// true iff there is an key entry consisting of the pair ( <paramref name="keyPart1" />,
/// <paramref name="keyPart2" />) that has a non-null and non-empty key.
/// </returns>
public static bool ContainsKeyNonEmptyNotNullValue <T1, T2, T3, T4>(this DualKeyDictionary <T1, T2, T3> dict,
T1 keyPart1, T2 keyPart2) where T3 : HashSet <T4>
{
// Return false if the key doesn't exist.
if (!dict.ContainsKey(keyPart1, keyPart2))
{
return(false);
}
// Return a value associated not just with checking if the value <keyPart1, keyPart2> is
// in the Dictionary, and that its value is non-null and non-empty.
T3 dictValue = dict[keyPart1, keyPart2];
return(dictValue != null && !dictValue.IsEmpty());
}
