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chore(async-rewriter): add tests for template strs and typeof (foo) #2414

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Merged
addaleax merged 1 commit into from
Mar 24, 2025
+14 −0
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chore(async-rewriter): add tests for template strs and typeof (foo) #2414

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14 changes: 14 additions & 0 deletions packages/async-rewriter2/src/async-writer-babel.spec.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -370,6 +370,16 @@ describe('AsyncWriter', function () {
expect(await ret).to.equal('bar');
});

it('can implicitly await inside of template literals', async function () {
implicitlyAsyncFn.resolves('foobar');
const ret = runTranspiledCode(
'(() => { return `>>${implicitlyAsyncFn()}<<`; })()'
);
expect(ret.constructor.name).to.equal('Promise');
expect(ret[Symbol.for('@@mongosh.syntheticPromise')]).to.equal(true);
expect(await ret).to.equal('>>foobar<<');
});

it('can implicitly await inside of branches', async function () {
implicitlyAsyncFn.resolves({ foo: 'bar' });
const ret = runTranspiledCode(`
Expand Down Expand Up @@ -476,6 +486,10 @@ describe('AsyncWriter', function () {
expect(runTranspiledCode('typeof nonexistent')).to.equal('undefined');
});

it('supports typeof for un-defined variables in parentheses', function () {
expect(runTranspiledCode('typeof ((nonexistent))')).to.equal('undefined');
});

it('supports typeof for implicitly awaited function calls', async function () {
implicitlyAsyncFn.resolves(0);
expect(await runTranspiledCode('typeof implicitlyAsyncFn()')).to.equal(
Expand Down
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