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'use strict';
const common = require('../common');
const assert = require('assert');
const zlib = require('zlib');
const {
Z_PARTIAL_FLUSH, Z_SYNC_FLUSH, Z_FULL_FLUSH, Z_FINISH
} = zlib.constants;
common.crashOnUnhandledRejection();
async function getOutput(...sequenceOfFlushes) {
const zipper = zlib.createGzip({ highWaterMark: 16384 });
zipper.write('A'.repeat(17000));
for (const flush of sequenceOfFlushes) {
zipper.flush(flush);
}
const data = [];
return new Promise((resolve) => {
zipper.on('data', common.mustCall((d) => {
data.push(d);
if (data.length === 2) resolve(Buffer.concat(data));
}, 2));
});
}
(async function() {
assert.deepStrictEqual(await getOutput(Z_SYNC_FLUSH),
await getOutput(Z_SYNC_FLUSH, Z_PARTIAL_FLUSH));
assert.deepStrictEqual(await getOutput(Z_SYNC_FLUSH),
await getOutput(Z_PARTIAL_FLUSH, Z_SYNC_FLUSH));
assert.deepStrictEqual(await getOutput(Z_FINISH),
await getOutput(Z_FULL_FLUSH, Z_FINISH));
assert.deepStrictEqual(await getOutput(Z_FINISH),
await getOutput(Z_SYNC_FLUSH, Z_FINISH));
})();