public void KeysISorted()
{
ISorted <string> keys = dict.Keys;
Assert.IsTrue(keys.IsReadOnly);
Assert.AreEqual("R", keys.FindMin());
Assert.AreEqual("T", keys.FindMax());
Assert.IsTrue(keys.Contains("S"));
Assert.AreEqual(3, keys.Count);
// This doesn't hold, maybe because the dict uses a special key comparer?
// Assert.IsTrue(keys.SequencedEquals(new WrappedArray<string>(new string[] { "R", "S", "T" })));
Assert.IsTrue(keys.UniqueItems().All(delegate(String s) {
return(s == "R" || s == "S" || s == "T");
}));
Assert.IsTrue(keys.All(delegate(String s) {
return(s == "R" || s == "S" || s == "T");
}));
Assert.IsFalse(keys.Exists(delegate(String s) {
return(s != "R" && s != "S" && s != "T");
}));
String res;
Assert.IsTrue(keys.Find(delegate(String s) {
return(s == "R");
}, out res));
Assert.AreEqual("R", res);
Assert.IsFalse(keys.Find(delegate(String s) {
return(s == "Q");
}, out res));
Assert.AreEqual(null, res);
}