爱特每羊队
75 lines
2.5 KiB
Rust
75 lines
2.5 KiB
Rust
//! rest 参数集成测试：实参收集、length 交互、与 spread/箭头/闭包组合。
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//! 每个用例独立编译执行，断言顶层表达式结果。
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use oxide_compiler::compiler::Compiler;
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use oxide_parser::Allocator;
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use oxide_types::value::JsValue;
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use oxide_vm::vm::Vm;
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fn eval(source: &str) -> JsValue {
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let allocator = Allocator::default();
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let program = oxide_parser::parse(&allocator, source).expect("parse failed");
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let module = Compiler::new().compile(&program).expect("compile failed");
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let mut vm = Vm::new();
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vm.run(&module).expect("vm run failed")
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}
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fn eval_int(source: &str) -> i32 {
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let v = eval(source);
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if v.is_int() {
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v.as_int()
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} else if v.is_double() {
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v.as_double() as i32
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} else {
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panic!("expected number, got {v}")
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}
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}
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fn eval_str(source: &str) -> String {
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let v = eval(source);
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if v.is_string() {
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unsafe { oxide_runtime_api::string_data(v) }.to_string()
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} else {
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format!("{v}")
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}
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}
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#[test]
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fn rest_collects_remaining_arguments() {
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assert_eq!(eval_int("function f(...args){return args.length} f(1,2,3)"), 3);
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assert_eq!(eval_str("function f(...args){return args.join(',')} f(1,2,3)"), "1,2,3");
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assert_eq!(eval_int("function f(...args){return args.length} f()"), 0);
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assert_eq!(eval_int("function f(...args){return args[0]+args[1]} f(7,8)"), 15);
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}
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#[test]
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fn rest_after_fixed_params_starts_at_fixed_count() {
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assert_eq!(eval_str("function f(a,...rest){return a+':'+rest.join(',')} f(1,2,3)"), "1:2,3");
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assert_eq!(eval_int("function f(a,b,...rest){return rest.length} f(1,2,3,4,5)"), 3);
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assert_eq!(eval_int("function f(a,b,...rest){return rest.length} f(1)"), 0);
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}
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#[test]
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fn rest_is_a_mutable_array() {
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assert_eq!(eval_str("function f(...args){return Array.isArray(args)&&'y'} f(1)"), "y");
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assert_eq!(eval_str("function f(a,...r){r.push(4); return r.join(',')} f(1,2,3)"), "2,3,4");
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assert_eq!(eval_str("function f(...a){a[0]=99; return a.join(',')} f(1,2,3)"), "99,2,3");
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}
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#[test]
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fn rest_combines_with_spread_and_arrow() {
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assert_eq!(eval_int("function f(...rest){return rest.length} f(...[1,2,3])"), 3);
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assert_eq!(eval_int("var f=(...args)=>args.length; f(1,2,3)"), 3);
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}
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#[test]
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fn rest_captured_by_closure() {
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assert_eq!(eval_int("function f(...a){return ()=>a.length} f(1,2,3)()"), 3);
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}
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#[test]
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fn rest_does_not_count_toward_function_length() {
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assert_eq!(eval("function f(...r){}; f.length"), JsValue::int(0));
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assert_eq!(eval("function f(a,b=1,...r){}; f.length"), JsValue::int(1));
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}
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