public void TestHalt()
{
// Arrange
var cpu = new CPU();
var random = new Random();
var memory = new Memory(random);
var consoleOutput = new ConsoleOutput();
var interpreter = new Interpreter(cpu, memory, random, consoleOutput);
var instruction = new Instruction
{
ExecutionPossibility = 100,
FirstRegister = 0,
MemoryAddress = 0,
OpCode = OpCodes.Halt,
SecondRegister = 0,
ThirdRegister = 0
};
// Act
interpreter.ExecuteInstruction(instruction);
// Assert
// Expected exception specified in method attribute
}
public void TestComparison()
{
// Arrange
var cpu = new CPU();
cpu.C = 0;
cpu.R[2] = 100;
cpu.R[3] = 200;
var random = new Random();
var memory = new Memory(random);
var consoleOutput = new ConsoleOutput();
var interpreter = new Interpreter(cpu, memory, random, consoleOutput);
var instruction = new Instruction
{
ExecutionPossibility = 100,
FirstRegister = 2,
MemoryAddress = 0,
OpCode = OpCodes.Compare,
SecondRegister = 3,
ThirdRegister = 0
};
// Act
interpreter.ExecuteInstruction(instruction);
// Assert
Assert.AreEqual(-1, cpu.C);
}
public void TestJumpIfGreater()
{
// Arrange
var cpu = new CPU();
cpu.C = 1;
cpu.PC = 0;
unchecked
{
cpu.R[0] = (int) 0x98513691;
}
var random = new Random();
var memory = new Memory(random);
var consoleOutput = new ConsoleOutput();
var interpreter = new Interpreter(cpu, memory, random, consoleOutput);
var instruction = new Instruction
{
ExecutionPossibility = 100,
FirstRegister = 0,
MemoryAddress = 0,
OpCode = OpCodes.JumpIfGreater,
SecondRegister = 0,
ThirdRegister = 0
};
// Act
interpreter.ExecuteInstruction(instruction);
// Assert
Assert.AreEqual(0x98513691, cpu.PC);
}
public void TestStoreByMem()
{
// Arrange
var cpu = new CPU();
cpu.R[0] = 0x0A0B0C0D;
var random = new Random();
var memory = new Memory(random);
var consoleOutput = new ConsoleOutput();
var interpreter = new Interpreter(cpu, memory, random, consoleOutput);
var instruction = new Instruction
{
ExecutionPossibility = 100,
FirstRegister = 0,
MemoryAddress = 0x87654320,
OpCode = OpCodes.StoreByMem,
SecondRegister = 1,
ThirdRegister = 2
};
// Act
interpreter.ExecuteInstruction(instruction);
var valueInMemory = memory.ReadWord(0x87654320);
// Assert
Assert.AreEqual(0x0A0B0C0D, valueInMemory);
}
public void TestRandomizedAdd()
{
// Arrange
var cpu = new CPU();
cpu.R[0] = 0;
cpu.R[1] = 200;
cpu.R[2] = 300;
var random = new Random();
var memory = new Memory(random);
var consoleOutput = new ConsoleOutput();
var interpreter = new Interpreter(cpu, memory, random, consoleOutput);
var instruction = new Instruction
{
ExecutionPossibility = 100,
FirstRegister = 0,
MemoryAddress = 0,
OpCode = OpCodes.RandomizedAdd,
SecondRegister = 1,
ThirdRegister = 2
};
// Act
interpreter.ExecuteInstruction(instruction);
// Assert
Assert.That(cpu.R[0], Is.EqualTo(500).Within(1).Percent);
}
public void TestMultiplication()
{
// Arrange
var cpu = new CPU();
cpu.R[0] = 0;
cpu.R[1] = 200;
cpu.R[2] = 300;
var random = new Random();
var memory = new Memory(random);
var consoleOutput = new ConsoleOutput();
var interpreter = new Interpreter(cpu, memory, random, consoleOutput);
var instruction = new Instruction
{
ExecutionPossibility = 100,
FirstRegister = 0,
MemoryAddress = 0,
OpCode = OpCodes.Multiply,
SecondRegister = 1,
ThirdRegister = 2
};
// Act
interpreter.ExecuteInstruction(instruction);
// Assert
Assert.AreEqual(60000, cpu.R[0]);
}
public void TestLogicalOrWithZeroProbability()
{
// Arrange
var cpu = new CPU();
cpu.R[10] = 0;
cpu.R[11] = 0x02040608;
cpu.R[12] = 0x10305070;
var random = new Random();
var memory = new Memory(random);
var consoleOutput = new ConsoleOutput();
var interpreter = new Interpreter(cpu, memory, random, consoleOutput);
var instruction = new Instruction
{
ExecutionPossibility = 0,
FirstRegister = 10,
MemoryAddress = 0,
OpCode = OpCodes.Or,
SecondRegister = 11,
ThirdRegister = 12
};
// Act
interpreter.ExecuteInstruction(instruction);
// Assert
Assert.AreEqual(0, cpu.R[10]);
}