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dust/dust-lang/tests/basic.rs

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4.1 KiB
Rust
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use dust_lang::*;
#[test]
fn constant() {
let source = "42";
assert_eq!(
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compile(source),
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Ok(Chunk::with_data(
None,
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FunctionType {
type_parameters: None,
value_parameters: None,
return_type: Type::Integer
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},
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vec![
(Instruction::load_constant(0, 0, false), Span(0, 2)),
(Instruction::r#return(true), Span(2, 2))
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],
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vec![ConcreteValue::Integer(42)],
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vec![]
))
);
assert_eq!(run(source), Ok(Some(ConcreteValue::Integer(42))));
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}
#[test]
fn empty() {
let source = "";
assert_eq!(
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compile(source),
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Ok(Chunk::with_data(
None,
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FunctionType {
type_parameters: None,
value_parameters: None,
return_type: Box::new(Type::None)
},
vec![(Instruction::r#return(false), Span(0, 0))],
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vec![],
vec![]
))
);
assert_eq!(run(source), Ok(None));
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}
#[test]
fn parentheses_precedence() {
let source = "(1 + 2) * 3";
assert_eq!(
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compile(source),
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Ok(Chunk::with_data(
None,
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FunctionType {
type_parameters: None,
value_parameters: None,
return_type: Box::new(Type::Integer)
},
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vec![
(
Instruction::add(
Destination::Register(0),
Argument::Constant(0),
Argument::Constant(1)
),
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Span(3, 4)
),
(
Instruction::multiply(
Destination::Register(1),
Argument::Register(0),
Argument::Constant(2)
),
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Span(8, 9)
),
(Instruction::r#return(true), Span(11, 11)),
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],
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vec![
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ConcreteValue::Integer(1),
ConcreteValue::Integer(2),
ConcreteValue::Integer(3)
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],
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vec![]
))
);
assert_eq!(run(source), Ok(Some(ConcreteValue::Integer(9))));
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}
#[test]
fn math_operator_precedence() {
let source = "1 + 2 - 3 * 4 / 5";
assert_eq!(
compile(source),
Ok(Chunk::with_data(
None,
FunctionType {
type_parameters: None,
value_parameters: None,
return_type: Box::new(Type::Integer),
},
vec![
(
Instruction::add(
Destination::Register(0),
Argument::Constant(0),
Argument::Constant(1)
),
Span(2, 3)
),
(
Instruction::multiply(
Destination::Register(1),
Argument::Constant(2),
Argument::Constant(3)
),
Span(10, 11)
),
(
Instruction::divide(
Destination::Register(2),
Argument::Register(1),
Argument::Constant(4)
),
Span(14, 15)
),
(
Instruction::subtract(
Destination::Register(3),
Argument::Register(0),
Argument::Register(2)
),
Span(6, 7)
),
(Instruction::r#return(true), Span(17, 17)),
],
vec![
ConcreteValue::Integer(1),
ConcreteValue::Integer(2),
ConcreteValue::Integer(3),
ConcreteValue::Integer(4),
ConcreteValue::Integer(5),
],
vec![]
))
);
assert_eq!(run(source), Ok(Some(ConcreteValue::Integer(1))));
}