public void Push_Pointer_IsCorrect(int index, string segment)
{
var actual = MemoryCommand.Push("", "pointer", index).HackInstructions;
var expected = new[]
{
segment,
"D=M",
"@SP",
"M=M+1",
"A=M-1",
"M=D"
};
Assert.Equal(expected, actual);
}
public void Push_Temp_IsCorrect(int index)
{
var actual = MemoryCommand.Push("", "temp", index).HackInstructions;
var expected = new[]
{
$"@{index + 5}",
"D=M",
"@SP",
"M=M+1",
"A=M-1",
"M=D"
};
Assert.Equal(expected, actual);
}
public void Push_StaticSegment_IsCorrect()
{
var actual = MemoryCommand.Push("Foo", "static", 2).HackInstructions;
var expected = new[]
{
"@Foo.2",
"D=M",
"@SP",
"M=M+1",
"A=M-1",
"M=D",
};
Assert.Equal(expected, actual);
}
public void Push_Constant_IsCorrect(int i)
{
var actual = MemoryCommand.Push("", "constant", i).HackInstructions;
var expected = new[]
{
$"@{i}",
"D=A",
"@SP",
"M=M+1",
"A=M-1",
"M=D",
};
Assert.Equal(expected, actual);
}
public void Push_ConstantLocalArgumentThisThat_IsCorrect(
string segment, string segmentBase, int index)
{
var actual = MemoryCommand.Push("", segment, index).HackInstructions;
var expected = new[]
{
segmentBase,
"D=M",
$"@{index}",
"A=D+A",
"D=M",
"@SP",
"M=M+1",
"A=M-1",
"M=D",
};
Assert.Equal(expected, actual);
}