public void TestImmutableKeys() {
ParseUser user = new ParseUser();
string[] immutableKeys = new string[] {
"sessionToken", "isNew"
};
foreach (var key in immutableKeys) {
Assert.Throws<InvalidOperationException>(() =>
user[key] = "1234567890"
);
Assert.Throws<InvalidOperationException>(() =>
user.Add(key, "1234567890")
);
Assert.Throws<InvalidOperationException>(() =>
user.AddRangeUniqueToList(key, new string[] { "1234567890" })
);
Assert.Throws<InvalidOperationException>(() =>
user.Remove(key)
);
Assert.Throws<InvalidOperationException>(() =>
user.RemoveAllFromList(key, new string[] { "1234567890" })
);
}
// Other special keys should be good
user["username"] = "******";
user["password"] = "******";
}