public void Method_call_load_two_numbers_then_add()
{
// Arrange
var builder = GetBuilder();
var pointer = 0;
// Act
_ = builder.GetIlProgram(); // Test reproducable property of CodeBuilder
var program = builder.GetBinaryProgram();
// Assert
// Entry Point
Assert.Equal(0, pointer);
Assert.Equal(11, BinaryConvert.GetInt32(ref pointer, program));
// two
var method_two = pointer;
Assert.Equal(5, ++pointer);
Assert.Equal(InstructionCode.Ldc_i4, BinaryConvert.GetInstructionCode(ref pointer, program));
Assert.Equal(2, BinaryConvert.GetInt32(ref pointer, program));
Assert.Equal(InstructionCode.Ret, BinaryConvert.GetInstructionCode(ref pointer, program));
// main
Assert.Equal(12, ++pointer);
Assert.Equal(InstructionCode.Ldc_i4, BinaryConvert.GetInstructionCode(ref pointer, program));
Assert.Equal(1, BinaryConvert.GetInt32(ref pointer, program));
Assert.Equal(InstructionCode.Call, BinaryConvert.GetInstructionCode(ref pointer, program));
Assert.Equal(method_two, BinaryConvert.GetInt32(ref pointer, program));
Assert.Equal(InstructionCode.Add, BinaryConvert.GetInstructionCode(ref pointer, program));
Assert.Equal(InstructionCode.Ret, BinaryConvert.GetInstructionCode(ref pointer, program));
private InstructionCode GetInstruction(ReadOnlySpan <byte> program)
{
try
{
return(BinaryConvert.GetInstructionCode(ref _pointer, program));
}
catch (InvalidOperationException ex)
{
Debug.WriteLine(ex.Message);
Throw.NotSupportedInstruction(_pointer, program[_pointer]);
throw; // can't happen
}
}
