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55 lines
1.2 KiB
55 lines
1.2 KiB
'use strict';
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const common = require('../common');
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const assert = require('assert');
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// If everything aligns so that you do a read(n) of exactly the
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// remaining buffer, then make sure that 'end' still emits.
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const READSIZE = 100;
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const PUSHSIZE = 20;
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const PUSHCOUNT = 1000;
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const HWM = 50;
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const Readable = require('stream').Readable;
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const r = new Readable({
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highWaterMark: HWM
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});
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const rs = r._readableState;
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r._read = push;
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r.on('readable', function() {
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console.error('>> readable');
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let ret;
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do {
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console.error(' > read(%d)', READSIZE);
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ret = r.read(READSIZE);
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console.error(' < %j (%d remain)', ret && ret.length, rs.length);
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} while (ret && ret.length === READSIZE);
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console.error('<< after read()',
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ret && ret.length,
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rs.needReadable,
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rs.length);
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});
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r.on('end', common.mustCall(function() {}));
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let pushes = 0;
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function push() {
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if (pushes > PUSHCOUNT)
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return;
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if (pushes++ === PUSHCOUNT) {
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console.error(' push(EOF)');
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return r.push(null);
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}
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console.error(' push #%d', pushes);
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if (r.push(Buffer.allocUnsafe(PUSHSIZE)))
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setTimeout(push, 1);
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}
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process.on('exit', function() {
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assert.strictEqual(pushes, PUSHCOUNT + 1);
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});
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