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test: fix flaky async-hooks/test-zlib.zlib-binding.deflate #21077

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test: fix flaky async-hooks/test-zlib.zlib-binding.deflate #21077

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23 changes: 16 additions & 7 deletions test/async-hooks/test-zlib.zlib-binding.deflate.js
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Original file line number Diff line number Diff line change
Expand Up @@ -21,31 +21,37 @@ assert.strictEqual(typeof hdl.uid, 'number');
assert.strictEqual(typeof hdl.triggerAsyncId, 'number');
checkInvocations(hdl, { init: 1 }, 'when created handle');

// Store all buffers together so that they do not get
// garbage collected.
const buffers = {
writeResult: new Uint32Array(2),
dictionary: new Uint8Array(0),
inBuf: new Uint8Array([0x78]),
outBuf: new Uint8Array(1)
};

handle.init(
constants.Z_DEFAULT_WINDOWBITS,
constants.Z_MIN_LEVEL,
constants.Z_DEFAULT_MEMLEVEL,
constants.Z_DEFAULT_STRATEGY,
new Uint32Array(2),
buffers.writeResult,
function processCallback() { this.cb(); },
Buffer.from('')
buffers.dictionary
);
checkInvocations(hdl, { init: 1 }, 'when initialized handle');

const inBuf = Buffer.from('x');
const outBuf = Buffer.allocUnsafe(1);

let count = 2;
handle.cb = common.mustCall(onwritten, 2);
handle.write(true, inBuf, 0, 1, outBuf, 0, 1);
handle.write(true, buffers.inBuf, 0, 1, buffers.outBuf, 0, 1);
checkInvocations(hdl, { init: 1 }, 'when invoked write() on handle');

function onwritten() {
if (--count) {
// first write
checkInvocations(hdl, { init: 1, before: 1 },
'when wrote to handle the first time');
handle.write(true, inBuf, 0, 1, outBuf, 0, 1);
handle.write(true, buffers.inBuf, 0, 1, buffers.outBuf, 0, 1);
} else {
// second write
checkInvocations(hdl, { init: 1, before: 2, after: 1 },
Expand All @@ -61,4 +67,7 @@ function onexit() {
// TODO: destroy never called here even with large amounts of ticks
// is that correct?
checkInvocations(hdl, { init: 1, before: 2, after: 2 }, 'when process exits');

// Do something with `buffers` to keep them alive until here.
buffers.buffers = buffers;
}