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37 lines
1018 B
37 lines
1018 B
2 years ago
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var stream = require('../lib/lazystream');
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var helper = require('./helper');
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exports.pipe = {
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readwrite: function(test) {
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var expected = [ 'line1\n', 'line2\n' ];
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var actual = [];
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var readableInstantiated = false;
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var writableInstantiated = false;
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test.expect(3);
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var readable = new stream.Readable(function() {
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readableInstantiated = true;
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return new helper.DummyReadable([].concat(expected));
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});
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var writable = new stream.Writable(function() {
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writableInstantiated = true;
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return new helper.DummyWritable(actual);
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});
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test.equal(readableInstantiated, false, 'DummyReadable should only be instantiated when it is needed');
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test.equal(writableInstantiated, false, 'DummyWritable should only be instantiated when it is needed');
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writable.on('end', function() {
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test.equal(actual.join(''), expected.join(''), 'Piping on demand streams should keep data intact');
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test.done();
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});
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readable.pipe(writable);
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}
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};
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