public void TestDictionarySetContainKeys()
{
DictionarySet <int, int> dictionarySet = new DictionarySet <int, int>();
// check that keys do not exist in empty DictionarySet
Assert.IsFalse(dictionarySet.ConatinsKey(FOO), "Key FOO existed in empty DictionarySet");
Assert.IsFalse(dictionarySet.ConatinsKey(BAR), "Key BAR existed in empty DictionarySet");
// add key/value pair, ensure it did not exist before
Assert.IsTrue(dictionarySet.Add(FOO, BAR), "FOO/BAR existed when adding to empty DictionarySet");
// check that key exists
Assert.IsTrue(dictionarySet.ConatinsKey(FOO), "Key FOO did not exist after adding FOO/BAR to DictionarySet");
// check that wrong key does not exist
Assert.IsFalse(dictionarySet.ConatinsKey(BAR), "Key BAR exists in DictionarySet before added");
// add inverse key/value pair, ensure it did not exist before
Assert.IsTrue(dictionarySet.Add(BAR, FOO), "BAR/FOO existed when adding to DictionarySet that did not contain them");
// check that inverse key now exists
Assert.IsTrue(dictionarySet.ConatinsKey(BAR), "Key BAR did not exist after adding BAR/FOO to DictionarySet");
}
