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52 lines
1.2 KiB
52 lines
1.2 KiB
'use strict';
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require('../common');
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var assert = require('assert');
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var Transform = require('stream').Transform;
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var parser = new Transform({ readableObjectMode: true });
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assert(parser._readableState.objectMode);
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assert(!parser._writableState.objectMode);
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assert.strictEqual(parser._readableState.highWaterMark, 16);
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assert.strictEqual(parser._writableState.highWaterMark, 16 * 1024);
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parser._transform = function(chunk, enc, callback) {
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callback(null, { val: chunk[0] });
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};
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var parsed;
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parser.on('data', function(obj) {
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parsed = obj;
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});
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parser.end(Buffer.from([42]));
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process.on('exit', function() {
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assert.strictEqual(parsed.val, 42);
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});
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var serializer = new Transform({ writableObjectMode: true });
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assert(!serializer._readableState.objectMode);
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assert(serializer._writableState.objectMode);
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assert.strictEqual(serializer._readableState.highWaterMark, 16 * 1024);
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assert.strictEqual(serializer._writableState.highWaterMark, 16);
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serializer._transform = function(obj, _, callback) {
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callback(null, Buffer.from([obj.val]));
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};
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var serialized;
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serializer.on('data', function(chunk) {
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serialized = chunk;
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});
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serializer.write({ val: 42 });
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process.on('exit', function() {
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assert.strictEqual(serialized[0], 42);
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});
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