public void RunShouldDecrementCorrectly()
{
var program = new string('-', 191);
var runner = new BrainfuckRunner(_memoryMock, program, _readFunc, _writeAction);
runner.Run();
A.CallTo(() => _memoryMock.Decrement()).MustHaveHappened(Repeated.Exactly.Times(191));
}
public void RunShouldMoveLeftCorrectly()
{
var program = new string('<', 2);
var runner = new BrainfuckRunner(_memoryMock, program, _readFunc, _writeAction);
runner.Run();
A.CallTo(() => _memoryMock.MoveLeft()).MustHaveHappened(Repeated.Exactly.Twice);
}
private static void Main()
{
const string program = ">+[>,]<[<]>>[.>]";
const string input = "Hello\n\0";
var i = 0;
Func<int> readFunc = () => input[i++];
Console.WriteLine(program);
var runner = new BrainfuckRunner(new ArrayMemory(), program, readFunc, Console.Write);
runner.Run();
}
private static void Main()
{
const string program = ">+[>,]<[<]>>[.>]";
const string input = "Hello\n\0";
var i = 0;
Func <int> readFunc = () => input[i++];
Console.WriteLine(program);
var runner = new BrainfuckRunner(new ArrayMemory(), program, readFunc, Console.Write);
runner.Run();
}
public void RunShouldReadCharCorrectly()
{
const string program = ",";
var runner = new BrainfuckRunner(_memoryMock, program, _readFunc, _writeAction);
A.CallTo(() => _readFunc()).Returns('A');
runner.Run();
A.CallTo(() => _readFunc()).MustHaveHappened(Repeated.Exactly.Once);
A.CallTo(_memoryMock)
.Where(call => call.Method.Name == "set_CurrentValue" && call.Arguments.Get<byte>(0) == 'A')
.MustHaveHappened(Repeated.Exactly.Once);
}
public void RunShouldHandleSimpleLoopCorrectly()
{
const string program = "+++[-].";
var runner = new BrainfuckRunner(_memoryMock, program, _readFunc, _writeAction);
runner.Run();
A.CallTo(() => _writeAction('\0')).MustHaveHappened(Repeated.Exactly.Once);
}
public void RunShouldPrintCharCorrectly()
{
var runner = new BrainfuckRunner(_memoryMock, ".", _readFunc, _writeAction);
runner.Run();
A.CallTo(() => _writeAction('\0')).MustHaveHappened(Repeated.Exactly.Once);
}
public void RunShouldThrowExceptionForInvalidOperation()
{
var runner = new BrainfuckRunner(_memoryMock, "%", _readFunc, _writeAction);
Assert.Throws<ArgumentException>(() => runner.Run());
}
public void RunShouldThrowExceptionForUnmatchedOpeningBracket()
{
// ReSharper disable once UnusedVariable
var runner = new BrainfuckRunner(_memoryMock, "[+++", _readFunc, _writeAction);
}
public void RunShouldHandleInnerLoopsCorrectly(string program)
{
var currentPosition = 0;
var array = new byte[30000];
A.CallTo(() => _memoryMock.Increment()).Invokes(() => ++array[currentPosition]);
A.CallTo(() => _memoryMock.CurrentValue).ReturnsLazily(() => array[currentPosition]);
A.CallTo(() => _memoryMock.MoveRight()).Invokes(() => currentPosition = (currentPosition + 1)%3000);
var runner = new BrainfuckRunner(_memoryMock, program, _readFunc, _writeAction);
runner.Run();
Assert.AreEqual(0, _memoryMock.CurrentValue);
}