char/avril

git clone https://git.t4t.associates/char/avril

Charlotte Somsnapshot: embed shared main and worker startup in the CLI688e96e2026-10-19

mod common;

use common::run;

#[test]
fn primitives_cycles_and_property_serialization() {
    assert_eq!(run(r#"
        for(const value of [undefined,null,true,false,0,-0,NaN,Infinity,-Infinity,123n,'\ud800']){
            if(!Object.is(structuredClone(value),value))throw Error('Primitive');
        }
        let calls=0;
        const child={x:1}, source=Object.create(null);
        Object.defineProperties(source,{
            a:{value:child,enumerable:true},b:{value:child,enumerable:true},
            hidden:{value:()=>{},enumerable:false},
            getter:{enumerable:true,get(){calls++;return child;}}
        });
        source.self=source;source[Symbol('ignored')]=()=>{};
        const result=structuredClone(source);
        if(result===source || result.self!==result || result.a!==result.b || result.a!==result.getter || result.a===child || calls!==1)throw Error('Graph');
        if(Object.getPrototypeOf(result)!==Object.prototype || 'hidden' in result || Object.getOwnPropertySymbols(result).length)throw Error('Properties');
        const d=Object.getOwnPropertyDescriptor(result,'getter');
        if(!d.writable || !d.enumerable || !d.configurable || d.get)throw Error('Descriptor');
        const sparse=[];sparse.length=4;sparse[2]=child;sparse.extra=child;
        const array=structuredClone(sparse);
        if(array.length!==4 || 0 in array || array[2]!==array.extra)throw Error('Sparse array');
        class Custom { constructor(){this.value=7;} method(){} }
        if(Object.getPrototypeOf(structuredClone(new Custom()))!==Object.prototype)throw Error('Custom prototype');
        if(!Object.getOwnPropertyDescriptor(globalThis,'structuredClone').enumerable || structuredClone.name!=='structuredClone' || structuredClone.length!==1)throw Error('Function shape');
        try{new structuredClone({});throw Error('Constructor');}catch(e){if(!(e instanceof TypeError))throw e;}
        console.log('graphs');
    "#,&[]).stdout,b"graphs\n");
}

#[test]
fn maps_sets_dates_regexps_and_boxed_primitives() {
    assert_eq!(run(r#"
        const key={}, map=new Map(), set=new Set();
        map.set(key,set);map.set(map,key);set.add(key);set.add(map);
        const date=new Date(123456), re=/a+/giy;re.lastIndex=9;
        for(const value of [map,set,date,re,new Number(NaN),new Boolean(false),new String('hi'),Object(9n)])value.extra=()=>{};
        const result=structuredClone({map,set,key,date,re,boxed:[new Number(NaN),new Boolean(false),new String('hi'),Object(9n)]});
        if(result.map.get(result.key)!==result.set || result.map.get(result.map)!==result.key || !result.set.has(result.map) || !result.set.has(result.key))throw Error('Collection identity');
        if(result.date.getTime()!==123456 || result.re.source!=='a+' || result.re.flags!=='giy' || result.re.lastIndex!==0)throw Error('Date/RegExp');
        if(!Number.isNaN(result.boxed[0].valueOf()) || result.boxed[1].valueOf()!==false || result.boxed[2].valueOf()!=='hi' || result.boxed[3].valueOf()!==9n)throw Error('Boxed');
        if(!Number.isNaN(structuredClone(new Date(NaN)).getTime()))throw Error('Invalid Date');
        console.log('builtins');
    "#,&[]).stdout,b"builtins\n");
}

#[test]
fn buffers_and_views_copy_bytes_and_preserve_shared_graph_backing() {
    assert_eq!(run(r#"
        const buffer=new ArrayBuffer(64);new Uint8Array(buffer).set([1,2,3,4]);
        const views=[new Int8Array(buffer,1,3),new Uint8Array(buffer,1,3),new Uint8ClampedArray(buffer,1,3),new Int16Array(buffer,2,3),new Uint16Array(buffer,2,3),new Int32Array(buffer,4,3),new Uint32Array(buffer,4,3),new Float32Array(buffer,4,3),new Float64Array(buffer,8,3),new BigInt64Array(buffer,8,3),new BigUint64Array(buffer,8,3),new DataView(buffer,3,7)];
        if(typeof Float16Array==='function')views.push(new Float16Array(buffer,2,3));
        const result=structuredClone({buffer,views,again:views[0]});
        if(result.buffer===buffer || result.again!==result.views[0] || buffer.detached)throw Error('Buffer identity');
        for(let i=0;i<views.length;i++){
            const a=views[i],b=result.views[i];
            if(b.buffer!==result.buffer || b.byteOffset!==a.byteOffset || b.byteLength!==a.byteLength || Object.getPrototypeOf(b)!==Object.getPrototypeOf(a))throw Error('View');
        }
        new Uint8Array(buffer).fill(0);
        if(new Uint8Array(result.buffer).slice(0,4).join()!=='1,2,3,4')throw Error('Aliasing');
        console.log('views');
    "#,&[]).stdout,b"views\n");
}

#[test]
fn transfers_move_buffers_and_detach_even_unreferenced_entries() {
    assert_eq!(run(r#"
        const buffer=new ArrayBuffer(4), extra=new ArrayBuffer(2), view=new Uint8Array(buffer);view.set([1,2,3,4]);
        const result=structuredClone({buffer,view,again:buffer},{transfer:new Set([buffer,extra])});
        if(!buffer.detached || !extra.detached || view.byteLength!==0 || result.buffer===buffer || result.again!==result.buffer || result.view.buffer!==result.buffer || result.view.join()!=='1,2,3,4')throw Error('Transfer');
        const empty=new ArrayBuffer(0), moved=structuredClone(empty,{transfer:[empty]});
        if(!empty.detached || moved.detached || moved.byteLength!==0)throw Error('Empty transfer');
        console.log('transfers');
    "#,&[]).stdout,b"transfers\n");
}

#[test]
fn options_and_transfer_lists_follow_webidl_conversion_order() {
    assert_eq!(run(r#"
        for(const options of [1,'x',true,Symbol()]){
            try{structuredClone({},options);throw Error('Dictionary');}catch(e){if(!(e instanceof TypeError))throw e;}
        }
        for(const transfer of [null,1,'x',{},[null],[1],[Symbol()]]){
            try{structuredClone({},{transfer});throw Error('Sequence');}catch(e){if(!(e instanceof TypeError))throw e;}
        }
        try{structuredClone();throw Error('Missing value');}catch(e){if(!(e instanceof TypeError))throw e;}
        if(structuredClone(undefined,null)!==undefined)throw Error('Null dictionary');
        const log=[], buffer=new ArrayBuffer(2);
        const list={get [Symbol.iterator](){log.push('iterator');return function(){log.push('call');let n=0;return {get next(){log.push('next');return function(){log.push('step');return n++ ? {done:true} : {done:false,value:buffer};}}};};}};
        const source={get x(){log.push('value');return 1;}};
        structuredClone(source,{get transfer(){log.push('transfer');return list;}});
        if(log.join()!=='transfer,iterator,call,next,step,step,value' || !buffer.detached)throw Error('Order '+log);
        const reason={}, bad={get transfer(){throw reason;}};
        try{structuredClone({},bad);throw Error('Getter');}catch(e){if(e!==reason)throw e;}
        console.log('conversions');
    "#,&[]).stdout,b"conversions\n");
}

#[test]
fn clone_failures_are_dom_exceptions_and_do_not_detach_before_serialization() {
    assert_eq!(run(r#"
        function fails(value,options){try{structuredClone(value,options);throw Error('Accepted');}catch(e){if(!(e instanceof DOMException) || e.name!=='DataCloneError' || e.code!==25)throw e;}}
        for(const value of [()=>{},Symbol(),Object(Symbol()),new WeakMap(),new WeakSet(),new WeakRef({}),new Promise(()=>{}),new Proxy({},{}),new Proxy([],{}),[()=>{}],new Map([[()=>{},1]])])fails(value);
        const buffer=new ArrayBuffer(4);
        fails({fn:()=>{}},{transfer:[buffer]});
        fails({},{transfer:[buffer,buffer]});
        fails({},{transfer:[buffer,{}]});
        fails({},{transfer:[new SharedArrayBuffer(1)]});
        if(buffer.detached)throw Error('Early detach');
        const detached=new ArrayBuffer(1), view=new Uint8Array(detached), data=new DataView(detached);detached.transfer();
        for(const value of [detached,view,data])fails(value);
        fails({},{transfer:[detached]});
        const beforeDetached={};
        try{structuredClone({get x(){throw beforeDetached;}},{transfer:[detached]});throw Error('Early detached check');}catch(e){if(e!==beforeDetached)throw e;}
        const frozenStream=new ReadableStream(), frozenBuffer=new ArrayBuffer(1);
        Object.freeze(frozenStream);
        fails({stream:frozenStream},{transfer:[frozenBuffer,frozenStream]});
        if(frozenBuffer.detached || frozenStream.locked)throw Error('Frozen stream transfer changed sources');
        const reason={exact:true};
        try{structuredClone({get x(){throw reason;}},{transfer:[buffer]});throw Error('Getter');}catch(e){if(e!==reason)throw e;}
        if(buffer.detached || structuredClone({x:1}).x!==1)throw Error('Failed state');
        console.log('failures');
    "#,&[]).stdout,b"failures\n");
}

#[test]
fn getters_can_resize_or_detach_transfers_and_fail_in_list_order() {
    assert_eq!(run(r#"
        const first=new ArrayBuffer(2), second=new ArrayBuffer(3);
        try{structuredClone({get x(){second.transfer();return 1;}},{transfer:[first,second]});throw Error('Detached late buffer');}catch(e){if(e.name!=='DataCloneError')throw e;}
        if(!first.detached || !second.detached)throw Error('Transfer order');
        const a=new ArrayBuffer(2), b=new ArrayBuffer(3);
        try{structuredClone({get x(){a.transfer();return 1;}},{transfer:[a,b]});throw Error('Detached first');}catch(e){if(e.name!=='DataCloneError')throw e;}
        if(!a.detached || b.detached)throw Error('Failure order');
        const rab=new ArrayBuffer(2,{maxByteLength:8});new Uint8Array(rab).set([3,4]);
        const result=structuredClone({rab,get x(){rab.resize(4);return 1;}},{transfer:[rab]});
        if(!rab.detached || !result.rab.resizable || result.rab.maxByteLength!==8 || result.rab.byteLength!==4 || new Uint8Array(result.rab).join()!=='3,4,0,0')throw Error('Resize during serialization');
        const memory=new WebAssembly.Memory({initial:1});
        try{structuredClone(memory.buffer,{transfer:[memory.buffer]});throw Error('Wasm buffer transfer');}catch(e){if(!(e instanceof TypeError))throw e;}
        const shrunk=new ArrayBuffer(4,{maxByteLength:8}), fixed=new Uint8Array(shrunk,1,3);
        try{structuredClone({fixed,get x(){shrunk.resize(1);return 1;}},{transfer:[shrunk]});throw Error('Invalidated view');}catch(e){if(e.name!=='DataCloneError' || !e.message.includes('not yet implemented'))throw e;}
        if(!shrunk.detached || structuredClone(3)!==3)throw Error('Deserialization failure state');
        console.log('late transfers');
    "#,&[]).stdout,b"late transfers\n");
}

#[test]
fn resizable_and_shared_buffers_keep_their_native_semantics() {
    assert_eq!(run(r#"
        const buffer=new ArrayBuffer(4,{maxByteLength:12}), tracking=new Uint8Array(buffer), fixed=new Uint8Array(buffer,1,2);
        tracking.set([1,2,3,4]);const result=structuredClone({buffer,tracking,fixed});
        if(!result.buffer.resizable || result.buffer.maxByteLength!==12 || result.tracking.buffer!==result.buffer || result.fixed.buffer!==result.buffer)throw Error('Resizable');
        result.buffer.resize(8);
        if(result.tracking.length!==8 || result.fixed.length!==2 || buffer.byteLength!==4)throw Error('Tracking');
        const shared=new SharedArrayBuffer(4,{maxByteLength:12}), view=new Uint8Array(shared);view[0]=5;
        const copy=structuredClone({shared,view,again:shared});
        if(copy.shared===shared || copy.shared!==copy.again || copy.view.buffer!==copy.shared || !copy.shared.growable || copy.shared.maxByteLength!==12)throw Error('Shared graph');
        copy.view[0]=9;copy.shared.grow(8);
        if(view[0]!==9 || shared.byteLength!==8 || copy.view.length!==8 || view.length!==8)throw Error('Shared memory');
        console.log('native buffers');
    "#,&[]).stdout,b"native buffers\n");
}

#[test]
fn errors_dom_exceptions_and_webassembly_modules_clone() {
    assert_eq!(run(r#"
        for(const C of [Error,EvalError,RangeError,ReferenceError,SyntaxError,TypeError,URIError]){
            const error=new C('message',{cause:{x:1}});error.extra=()=>{};
            const result=structuredClone(error);
            if(!(result instanceof C) || result.message!=='message' || result.cause.x!==1 || result.cause===error.cause || 'extra' in result)throw Error('Error');
        }
        const e=new Error('cyclic');e.cause=e;const c=structuredClone(e);if(c.cause!==c)throw Error('Error cycle');
        const source=new DOMException('message','DataCloneError');source.extra=()=>{};
        const stack=source.stack;
        Object.defineProperty(source,'name',{get(){throw Error('Own name getter');}});
        const d=structuredClone(source);
        if(!Error.isError(d) || d.stack!==stack || DOMException.DATA_CLONE_ERR!==25 || d.DATA_CLONE_ERR!==25)throw Error('DOMException error data');
        if(!(d instanceof DOMException) || d.name!=='DataCloneError' || d.code!==25 || d.message!=='message' || 'extra' in d)throw Error('DOMException');
        const module=new WebAssembly.Module(new Uint8Array([0,97,115,109,1,0,0,0]));
        const modules=structuredClone([module,module]);
        if(modules[0]===module || modules[0]!==modules[1] || !(modules[0] instanceof WebAssembly.Module) || !(new WebAssembly.Instance(modules[0]) instanceof WebAssembly.Instance))throw Error('Wasm module');
        console.log('errors and wasm');
    "#,&[]).stdout,b"errors and wasm\n");
}

#[test]
fn blobs_and_files_clone_private_immutable_storage_and_metadata() {
    assert_eq!(run(r#"
        const bytes=new Uint8Array([1,2,3]), blob=new Blob([bytes],{type:'Text/Plain'}), file=new File([blob],'a\0\ud800.txt',{type:'x/file',lastModified:123});
        bytes.fill(0);blob.extra=()=>{};file.extra=()=>{};
        Object.defineProperty(file,'name',{get(){throw Error('Public metadata');}});
        Object.setPrototypeOf(blob,null);
        const result=structuredClone({blob,file,again:file,map:new Map([[file,blob]])});
        if(!(result.blob instanceof Blob) || result.blob===blob || result.blob.type!=='text/plain' || result.blob.size!==3)throw Error('Blob');
        if(!(result.file instanceof File) || result.file===file || result.file!==result.again || result.map.get(result.file)!==result.blob || result.file.name!=='a\0\ufffd.txt' || result.file.lastModified!==123 || result.file.type!=='x/file')throw Error('File');
        if('extra' in result.blob || 'extra' in result.file)throw Error('Expandos');
        (await result.file.bytes()).fill(0);
        if((await result.blob.bytes()).join()!=='1,2,3' || (await File.prototype.bytes.call(file)).join()!=='1,2,3')throw Error('Mutable clone');
        const mime=await new Response('x',{headers:{'Content-Type':'Text/HTML; Charset=UTF-8'}}).blob();
        if(structuredClone(mime).type!=='text/html;charset=UTF-8')throw Error('MIME case');
        let rope=new Blob(['x']);for(let i=0;i<50;i++)rope=new Blob([rope,rope]);
        const copied=structuredClone(rope);if(copied.size!==2**50 || await copied.slice(-1).text()!=='x')throw Error('Flattened rope');
        console.log('blob clones');
    "#,&[]).stdout,b"blob clones\n");
}

#[test]
fn platform_brands_reject_cloning_without_reading_public_properties() {
    assert_eq!(run(r#"
        let readableController, byteController, writableController, transformController;
        const readable=new ReadableStream({start(c){readableController=c;}}), bytes=new ReadableStream({type:'bytes',start(c){byteController=c;}});
        const writable=new WritableStream({start(c){writableController=c;}}), transform=new TransformStream({start(c){transformController=c;}});
        const reader=readable.getReader(), byob=bytes.getReader({mode:'byob'}), writer=writable.getWriter();
        const values=[new URL('https://example.test'),new URLSearchParams(),new URLSearchParams().entries(),new FormData().values(),new URLPattern({pathname:'*'}),new FormData(),new Headers(),new Request('https://example.test'),new Response(),new Event('x'),new EventTarget(),new AbortController(),new AbortController().signal,new TextEncoder(),new TextDecoder(),new TextEncoderStream(),new TextDecoderStream(),new ByteLengthQueuingStrategy({highWaterMark:1}),new CountQueuingStrategy({highWaterMark:1}),readable,bytes,writable,transform,reader,byob,writer,readableController,byteController,writableController,transformController,transform.readable,transform.writable];
        for(const value of values){
            Object.defineProperty(value,'trap',{enumerable:true,get(){throw Error('Read a platform expando');}});
            Object.setPrototypeOf(value,null);
            try{structuredClone(value);throw Error('Cloned platform object');}catch(e){if(e.name!=='DataCloneError')throw e;}
        }
        for(const stream of [readable,writable]){
            const buffer=new ArrayBuffer(1);let getter=false;
            try{structuredClone({get value(){getter=true;return 1;}}, {transfer:[buffer,stream]});throw Error('Transferred locked stream');}catch(e){if(e.name!=='DataCloneError')throw e;}
            if(buffer.detached||getter)throw Error('Invalid transfer was not rejected first');
        }
        const transferBuffer=new ArrayBuffer(1), movedTransform=structuredClone(transform,{transfer:[transferBuffer,transform]});
        if(!transferBuffer.detached || !(movedTransform instanceof TransformStream)
            || !(movedTransform.readable instanceof ReadableStream)
            || !(movedTransform.writable instanceof WritableStream))throw Error('Transform transfer');
        const fake=Object.create(Blob.prototype);fake.value=1;
        if(structuredClone(fake).value!==1)throw Error('Prototype mistaken for brand');
        console.log('brands');
    "#,&[]).stdout,b"brands\n");
}

#[test]
fn cloning_is_permissionless_and_native_helpers_remain_private() {
    assert_eq!(run(r#"
        import {pledge} from 'avril:std';pledge({net:false,read:false,jsExec:false});
        const buffer=new Uint8Array([1,2]).buffer;
        if(structuredClone(buffer,{transfer:[buffer]}).byteLength!==2 || !buffer.detached)throw Error('Permissionless clone');
        if(await structuredClone(new Blob(['x'])).text()!=='x')throw Error('Permissionless Blob');
        for(const name of ['ext:core/structured_clone','ext:web/serialization.js','ext:structured_clone/main.js']){
            try{await import(name);throw Error('Private import');}catch(e){if(!e.message.includes('private'))throw e;}
        }
        const opsSymbol=Symbol.for('__avril.ops');
        if(opsSymbol in globalThis || globalThis[opsSymbol]!==undefined || Reflect.ownKeys(globalThis).includes(opsSymbol))throw Error('Public native op registry');
        console.log('private and permissionless');
    "#,&[]).stdout,b"private and permissionless\n");
}

#[test]
fn private_cloning_uses_primordials_not_guest_constructors_or_prototype_hooks() {
    assert_eq!(run(r#"
        const blob=new Blob(['x']), file=new File([blob],'name',{lastModified:7}), exception=new DOMException('message','DataCloneError');
        const buffer=new Uint8Array([1,2,3]).buffer, originalDOMException=DOMException;
        const define=Object.defineProperty, getDescriptor=Object.getOwnPropertyDescriptor, getPrototype=Object.getPrototypeOf, setPrototype=Object.setPrototypeOf;
        const restore=[];
        const poison=()=>{throw Error('Guest hook invoked');};
        for(const [object,key] of [[WeakMap.prototype,'get'],[WeakMap.prototype,'set'],[Array.prototype,'push'],[ArrayBuffer.prototype,'slice'],[ArrayBuffer.prototype,'transfer'],[Object,'create'],[Object,'defineProperty'],[Reflect,'construct'],[Reflect,'apply']]){
            restore.push([object,key,getDescriptor(object,key)]);
        }
        for(let i=0;i<restore.length;i++)define(restore[i][0],restore[i][1],{value:poison,writable:true,configurable:true});
        const oldSuper=getPrototype(originalDOMException);setPrototype(originalDOMException,poison);
        define(Array.prototype,'0',{set:poison,configurable:true});
        define(blob,'size',{get:poison});define(file,'name',{get:poison});
        globalThis.DOMException=poison;
        let used=false;
        const transfer={ [Symbol.iterator](){return {next(){if(used)return {done:true};used=true;return {done:false,value:buffer};}};} };
        const result=structuredClone({blob,file,exception,buffer},{transfer});
        let failure;
        try{structuredClone(()=>{});}catch(e){failure=e;}
        delete Array.prototype[0];
        for(let i=0;i<restore.length;i++)define(restore[i][0],restore[i][1],restore[i][2]);
        setPrototype(originalDOMException,oldSuper);globalThis.DOMException=originalDOMException;
        if(!buffer.detached || new Uint8Array(result.buffer).join()!=='1,2,3' || result.file.name!=='name' || result.file.lastModified!==7 || await result.blob.text()!=='x' || result.exception.message!=='message')throw Error('Tampered clone');
        if(!(failure instanceof originalDOMException) || failure.name!=='DataCloneError' || failure.code!==25 || !Error.isError(failure))throw Error('Tampered clone error');
        console.log('primordials');
    "#,&[]).stdout,b"primordials\n");
}