await-using-causes-awaits.js

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// |jit-test| skip-if: !getBuildConfiguration("explicit-resource-management"); --enable-explicit-resource-management

load(libdir + "asserts.js");

  const disposed = [];

  let wasStartedBeforeAwait = false;

  let didEvaluatePrecedingBlockStatementsBeforeAwait = false;

  let didEvaluateFollowingBlockStatementsBeforeAwait = false;

  let allStatementsRanBeforeAwait = false;

  async function testAwaitUsingCausesAnAwait(evaluateAwaitUsing) {

    let isRunningBeforeAwait = true;

    async function f() {

      wasStartedBeforeAwait = isRunningBeforeAwait;

      outer: {

        didEvaluatePrecedingBlockStatementsBeforeAwait = isRunningBeforeAwait;

        if (!evaluateAwaitUsing) break outer;

        await using _ = {

          [Symbol.asyncDispose]() {

            disposed.push(1);

};

        didEvaluateFollowingBlockStatementsBeforeAwait = isRunningBeforeAwait;

      allStatementsRanBeforeAwait = isRunningBeforeAwait;

    let p = f();

    isRunningBeforeAwait = false;

    await p;

  testAwaitUsingCausesAnAwait(false);

  drainJobQueue();

  assertEq(wasStartedBeforeAwait, true);

  assertEq(didEvaluatePrecedingBlockStatementsBeforeAwait, true);

  assertEq(allStatementsRanBeforeAwait, true);

  assertArrayEq(disposed, []);

  wasStartedBeforeAwait = false;

  didEvaluatePrecedingBlockStatementsBeforeAwait = false;

  didEvaluateFollowingBlockStatementsBeforeAwait = false;

  allStatementsRanBeforeAwait = false;

  testAwaitUsingCausesAnAwait(true);

  drainJobQueue();

  assertEq(wasStartedBeforeAwait, true);

  // the await using statement is supposed to cause an await right before the scope

  // end thus the block statements should be evaluated synchronously until the scope end.

  assertEq(didEvaluatePrecedingBlockStatementsBeforeAwait, true);

  assertEq(didEvaluateFollowingBlockStatementsBeforeAwait, true);

  assertEq(allStatementsRanBeforeAwait, false);

  assertArrayEq(disposed, [1]);