public void SimpleCompiledDelegateCache_Basics()
{
var cache = new SimpleCompiledDelegateCache();
Assert.AreEqual(0, cache.Count);
var f1 = (Func <int>)cache.GetOrAdd(Expression.Lambda(Expression.Constant(42)));
Assert.AreEqual(42, f1());
Assert.AreEqual(1, cache.Count);
var f2 = (Func <int>)cache.GetOrAdd(Expression.Lambda(Expression.Constant(42)));
Assert.AreEqual(42, f2());
Assert.AreSame(f1, f2);
Assert.AreEqual(1, cache.Count);
var f3 = (Func <int>)cache.GetOrAdd(Expression.Lambda(Expression.Constant(43)));
Assert.AreEqual(43, f3());
Assert.AreEqual(2, cache.Count);
cache.Clear();
var f4 = (Func <int>)cache.GetOrAdd(Expression.Lambda(Expression.Constant(42)));
Assert.AreEqual(42, f4());
Assert.AreNotSame(f1, f4);
Assert.AreEqual(1, cache.Count);
}
public void SimpleCompiledDelegateCache_ArgumentChecking()
{
var cache = new SimpleCompiledDelegateCache();
Assert.ThrowsException <ArgumentNullException>(() => cache.GetOrAdd(expression: null));
}