tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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await-using-for-of-loop-head-causes-awaits.js (1095B)

      1 // |jit-test| skip-if: !getBuildConfiguration("explicit-resource-management"); --enable-explicit-resource-management
      2 
      3 load(libdir + "asserts.js");
      4 
      5 {
      6  const values = [];
      7  async function testAwaitUsingInForOfLoopHeadAwaitsPromise() {
      8    const obj = {
      9      [Symbol.asyncDispose]() {
     10        values.push(1);
     11        return new Promise(() => {});
     12      }
     13    };
     14  
     15    // The dispose operation here should wait forever.
     16    for (await using u of [obj]) {}
     17  
     18    values.push(2);
     19  }
     20  testAwaitUsingInForOfLoopHeadAwaitsPromise();
     21  drainJobQueue();
     22  assertArrayEq(values, [1]);
     23 }
     24 
     25 {
     26  const disposed = [];
     27  let caught;
     28  async function testAwaitUsingInForOfLoopHeadAwaitsPromiseRejection() {
     29    const obj = {
     30      [Symbol.asyncDispose]() {
     31        disposed.push(1);
     32        return new Promise((res, rej) => {
     33          rej('err');
     34        });
     35      }
     36    };
     37 
     38    try {
     39      for (await using u of [obj]) {}
     40    } catch (e) {
     41      caught = e;
     42    }
     43  }
     44  testAwaitUsingInForOfLoopHeadAwaitsPromiseRejection();
     45  drainJobQueue();
     46  assertArrayEq(disposed, [1]);
     47  assertEq(caught, 'err');
     48 }