public void Capacity()
{
// Arrange
var memory = new BrainfMemory(10);
// Act
var capacity = memory.Capacity;
for (var i = 0; i < 11; i++)
{
memory.CellValue = i;
memory.Pointer++;
}
// Assert
Assert.Equal(10, capacity);
Assert.Equal(20, memory.Capacity);
}
public void Negative_Pointer()
{
// Arrange
var memory = new BrainfMemory();
var sum = 0;
// Act
for (var i = -1; i >= -10; i--)
{
memory.CellValue = -(i + 1);
memory.Pointer = i;
}
for (var i = -10; i <= -1; i++)
{
memory.Pointer = i;
sum += memory.CellValue;
}
// Assert
Assert.Equal(45, sum);
}
public void Compile()
{
// Arrange
const string sourceCode = @"
>++[<+++++++++++++>-]<[[>+>+<<-]>[<+>-]++++++++
[>++++++++<-]>.[-]<<>++++++++++[>++++++++++[>++
++++++++[>++++++++++[>++++++++++[>++++++++++[>+
+++++++++[-]<-]<-]<-]<-]<-]<-]<-]";
var parser = new BrainfParser();
var compiler = new BrainfCompiler();
var memory = new BrainfMemory();
var io = BrainfIO.CreateString();
// Act
var program = parser.Parse(sourceCode);
var func = compiler.Compile(program);
func(memory, io);
// Assert
Assert.Equal("ZYXWVUTSRQPONMLKJIHGFEDCBA", io.GetString());
}
public void Positive_Pointer()
{
// Arrange
var memory = new BrainfMemory();
var sum = 0;
// Act
for (var i = 0; i < 10; i++)
{
memory.Pointer = i;
memory.CellValue = i;
}
for (var i = 9; i >= 0; i--)
{
memory.Pointer = i;
sum += memory.CellValue;
}
// Assert
Assert.Equal(45, sum);
Assert.Equal(0, memory.Pointer);
Assert.Equal(0, memory.CellValue);
}