use dust_lang::*; #[test] fn subtract_assign() { let source = "let mut x = 42; x -= 2; x"; assert_eq!( compile(source), Ok(Chunk::with_data( None, FunctionType { type_parameters: None, value_parameters: None, return_type: Type::Integer, }, vec![ (Instruction::load_constant(0, 0, false), Span(12, 14)), ( Instruction::subtract(0, Argument::Register(0), Argument::Constant(2)), Span(18, 20) ), (Instruction::get_local(1, 0), Span(24, 25)), (Instruction::r#return(true), Span(25, 25)), ], vec![ ConcreteValue::Integer(42), ConcreteValue::string("x"), ConcreteValue::Integer(2) ], vec![Local::new(1, 0, true, Scope::default())] )), ); assert_eq!(run(source), Ok(Some(ConcreteValue::Integer(40)))); }