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test: add test cases for util.promisify #17613

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test: add test cases for util.promisify #17613

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test: add test cases for util.promisify
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@kakts
kakts committed Dec 11, 2017
commit 84bef02b81aedf786f60284e210bf71b17831894
14 changes: 14 additions & 0 deletions test/parallel/test-util-promisify.js
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Original file line number Diff line number Diff line change
Expand Up @@ -34,6 +34,20 @@ const stat = promisify(fs.stat);
assert.strictEqual(promisify(promisify(fn)), promisifedFn);
}

{
common.expectsError(
() => promisify(undefined),
{ code: 'ERR_INVALID_ARG_TYPE', type: TypeError }
);
}

{
common.expectsError(
() => promisify(null),
{ code: 'ERR_INVALID_ARG_TYPE', type: TypeError }
);
}

{
function fn() {}
fn[promisify.custom] = 42;
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