public void ReadIntWorks()
        {
            var bytecode = new List<byte>();
            bytecode.Add(Bytecode.READ_INT);
            bytecode.AddRange(BitConverter.GetBytes(4));
            bytecode.Add(Bytecode.READ_INT);
            bytecode.AddRange(BitConverter.GetBytes(1));
            bytecode.Add(Bytecode.READ_INT);
            bytecode.AddRange(BitConverter.GetBytes(2));

            var input = new List<string> { "4", "9", "12345" };
            int pos = 0;
            var interpreter = new Interpreter(bytecode.ToArray(), new List<string> {}, null, 5);
            interpreter.SetReader(() => input[pos++]);
            interpreter.Run();

            Assert.AreEqual(0, interpreter.Stack.Count);
            Assert.AreEqual(15, interpreter.PC);
            Assert.AreEqual(4, interpreter.Variables[4]);
            Assert.AreEqual(9, interpreter.Variables[1]);
            Assert.AreEqual(12345, interpreter.Variables[2]);
        }
        public void ReadStringWorks()
        {
            var bytecode = new List<byte>();
            bytecode.Add(Bytecode.READ_STRING);
            bytecode.AddRange(BitConverter.GetBytes(4));
            bytecode.Add(Bytecode.READ_STRING);
            bytecode.AddRange(BitConverter.GetBytes(1));
            bytecode.Add(Bytecode.READ_STRING);
            bytecode.AddRange(BitConverter.GetBytes(2));

            var input = new List<string> { "abc112", "hello", "abababababa" };
            int pos = 0;
            var interpreter = new Interpreter(bytecode.ToArray(), new List<string> { "hello", "world" }, null, 5);
            interpreter.SetReader(() => input[pos++]);
            interpreter.Run();

            Assert.AreEqual(0, interpreter.Stack.Count);
            Assert.AreEqual(15, interpreter.PC);
            Assert.AreEqual(2, interpreter.Variables[4]);
            Assert.AreEqual(0, interpreter.Variables[1]);
            Assert.AreEqual(3, interpreter.Variables[2]);

            Assert.AreEqual("abc112", interpreter.Strings[2]);
            Assert.AreEqual("abababababa", interpreter.Strings[3]);
        }
        public void ReadIntThrowsIfInputIsNotNumeric()
        {
            var bytecode = new List<byte>();
            bytecode.Add(Bytecode.READ_INT);
            bytecode.AddRange(BitConverter.GetBytes(4));
            bytecode.Add(Bytecode.READ_INT);
            bytecode.AddRange(BitConverter.GetBytes(1));
            bytecode.Add(Bytecode.READ_INT);
            bytecode.AddRange(BitConverter.GetBytes(2));

            var input = new List<string> { "abcdef", };
            int pos = 0;
            var interpreter = new Interpreter(bytecode.ToArray(), new List<string> { }, null, 5);
            interpreter.SetReader(() => input[pos++]);
            interpreter.Stack.Push(4);
            interpreter.Stack.Push(1);
            interpreter.Stack.Push(2);
            interpreter.Run();
        }