use super::Parser;
use crate::syntax::ast::{
node::{
field::GetConstField, ArrowFunctionDecl, Assign, BinOp, Call, Declaration, DeclarationList,
FormalParameter, FunctionDecl, Identifier, If, New, Node, Object, PropertyDefinition,
Return, StatementList, UnaryOp,
},
op::{self, CompOp, LogOp, NumOp},
Const,
};
#[allow(clippy::unwrap_used)]
#[track_caller]
pub(super) fn check_parser<L>(js: &str, expr: L)
where
L: Into<Box<[Node]>>,
{
assert_eq!(
Parser::new(js.as_bytes(), false)
.parse_all()
.expect("failed to parse"),
StatementList::from(expr)
);
}
#[track_caller]
pub(super) fn check_invalid(js: &str) {
assert!(Parser::new(js.as_bytes(), false).parse_all().is_err());
}
#[test]
fn check_construct_call_precedence() {
check_parser(
"new Date().getTime()",
vec![Node::from(Call::new(
GetConstField::new(
New::from(Call::new(Identifier::from("Date"), vec![])),
"getTime",
),
vec![],
))],
);
}
#[test]
fn assign_operator_precedence() {
check_parser(
"a = a + 1",
vec![Assign::new(
Identifier::from("a"),
BinOp::new(NumOp::Add, Identifier::from("a"), Const::from(1)),
)
.into()],
);
}
#[test]
fn hoisting() {
check_parser(
r"
var a = hello();
a++;
function hello() { return 10 }",
vec![
FunctionDecl::new(
Box::from("hello"),
vec![],
vec![Return::new(Const::from(10), None).into()],
)
.into(),
DeclarationList::Var(
vec![Declaration::new_with_identifier(
"a",
Node::from(Call::new(Identifier::from("hello"), vec![])),
)]
.into(),
)
.into(),
UnaryOp::new(op::UnaryOp::IncrementPost, Identifier::from("a")).into(),
],
);
check_parser(
r"
a = 10;
a++;
var a;",
vec![
Assign::new(Identifier::from("a"), Const::from(10)).into(),
UnaryOp::new(op::UnaryOp::IncrementPost, Identifier::from("a")).into(),
DeclarationList::Var(vec![Declaration::new_with_identifier("a", None)].into()).into(),
],
);
}
#[test]
fn ambigous_regex_divide_expression() {
let s = "1 / a === 1 / b";
check_parser(
s,
vec![BinOp::new(
CompOp::StrictEqual,
BinOp::new(NumOp::Div, Const::Int(1), Identifier::from("a")),
BinOp::new(NumOp::Div, Const::Int(1), Identifier::from("b")),
)
.into()],
);
}
#[test]
fn two_divisions_in_expression() {
let s = "a !== 0 || 1 / a === 1 / b;";
check_parser(
s,
vec![BinOp::new(
LogOp::Or,
BinOp::new(CompOp::StrictNotEqual, Identifier::from("a"), Const::Int(0)),
BinOp::new(
CompOp::StrictEqual,
BinOp::new(NumOp::Div, Const::Int(1), Identifier::from("a")),
BinOp::new(NumOp::Div, Const::Int(1), Identifier::from("b")),
),
)
.into()],
);
}
#[test]
fn comment_semi_colon_insertion() {
let s = r#"
let a = 10 // Comment
let b = 20;
"#;
check_parser(
s,
vec![
DeclarationList::Let(
vec![Declaration::new_with_identifier::<&str, Option<Node>>(
"a",
Some(Const::Int(10).into()),
)]
.into(),
)
.into(),
DeclarationList::Let(
vec![Declaration::new_with_identifier::<&str, Option<Node>>(
"b",
Some(Const::Int(20).into()),
)]
.into(),
)
.into(),
],
);
}
#[test]
fn multiline_comment_semi_colon_insertion() {
let s = r#"
let a = 10 /* Test
Multiline
Comment
*/ let b = 20;
"#;
check_parser(
s,
vec![
DeclarationList::Let(
vec![Declaration::new_with_identifier::<&str, Option<Node>>(
"a",
Some(Const::Int(10).into()),
)]
.into(),
)
.into(),
DeclarationList::Let(
vec![Declaration::new_with_identifier::<&str, Option<Node>>(
"b",
Some(Const::Int(20).into()),
)]
.into(),
)
.into(),
],
);
}
#[test]
fn multiline_comment_no_lineterminator() {
let s = r#"
let a = 10; /* Test comment */ let b = 20;
"#;
check_parser(
s,
vec![
DeclarationList::Let(
vec![Declaration::new_with_identifier::<&str, Option<Node>>(
"a",
Some(Const::Int(10).into()),
)]
.into(),
)
.into(),
DeclarationList::Let(
vec![Declaration::new_with_identifier::<&str, Option<Node>>(
"b",
Some(Const::Int(20).into()),
)]
.into(),
)
.into(),
],
);
}
#[test]
fn assignment_line_terminator() {
let s = r#"
let a = 3;
a =
5;
"#;
check_parser(
s,
vec![
DeclarationList::Let(
vec![Declaration::new_with_identifier::<&str, Option<Node>>(
"a",
Some(Const::Int(3).into()),
)]
.into(),
)
.into(),
Assign::new(Identifier::from("a"), Const::from(5)).into(),
],
);
}
#[test]
fn assignment_multiline_terminator() {
let s = r#"
let a = 3;
a =
5;
"#;
check_parser(
s,
vec![
DeclarationList::Let(
vec![Declaration::new_with_identifier::<&str, Option<Node>>(
"a",
Some(Const::Int(3).into()),
)]
.into(),
)
.into(),
Assign::new(Identifier::from("a"), Const::from(5)).into(),
],
);
}
#[test]
fn bracketed_expr() {
let s = r#"(b)"#;
check_parser(s, vec![Identifier::from("b").into()]);
}
#[test]
fn increment_in_comma_op() {
let s = r#"(b++, b)"#;
check_parser(
s,
vec![BinOp::new::<_, Node, Node>(
op::BinOp::Comma,
UnaryOp::new::<Node>(op::UnaryOp::IncrementPost, Identifier::from("b").into()).into(),
Identifier::from("b").into(),
)
.into()],
);
}
#[test]
fn spread_in_object() {
let s = r#"
let x = {
a: 1,
...b,
}
"#;
let object_properties = vec![
PropertyDefinition::property("a", Const::from(1)),
PropertyDefinition::spread_object(Identifier::from("b")),
];
check_parser(
s,
vec![DeclarationList::Let(
vec![Declaration::new_with_identifier::<&str, Option<Node>>(
"x",
Some(Object::from(object_properties).into()),
)]
.into(),
)
.into()],
);
}
#[test]
fn spread_in_arrow_function() {
let s = r#"
(...b) => {
b
}
"#;
check_parser(
s,
vec![
ArrowFunctionDecl::new::<Box<[FormalParameter]>, StatementList>(
Box::new([FormalParameter::new("b", None, true)]),
vec![Identifier::from("b").into()].into(),
)
.into(),
],
);
}
#[test]
fn empty_statement() {
check_parser(
r"
;;var a = 10;
if(a) ;
",
vec![
Node::Empty,
DeclarationList::Var(
vec![Declaration::new_with_identifier(
"a",
Node::from(Const::from(10)),
)]
.into(),
)
.into(),
Node::If(If::new::<_, _, Node, _>(
Identifier::from("a"),
Node::Empty,
None,
)),
],
);
}