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|
- var test = require('tape')
- var through = require('../')
-
- // must emit end before close.
-
- test('buffering', function(assert) {
- var ts = through(function (data) {
- this.queue(data)
- }, function () {
- this.queue(null)
- })
-
- var ended = false, actual = []
-
- ts.on('data', actual.push.bind(actual))
- ts.on('end', function () {
- ended = true
- })
-
- ts.write(1)
- ts.write(2)
- ts.write(3)
- assert.deepEqual(actual, [1, 2, 3])
- ts.pause()
- ts.write(4)
- ts.write(5)
- ts.write(6)
- assert.deepEqual(actual, [1, 2, 3])
- ts.resume()
- assert.deepEqual(actual, [1, 2, 3, 4, 5, 6])
- ts.pause()
- ts.end()
- assert.ok(!ended)
- ts.resume()
- assert.ok(ended)
- assert.end()
- })
-
- test('buffering has data in queue, when ends', function (assert) {
-
- /*
- * If stream ends while paused with data in the queue,
- * stream should still emit end after all data is written
- * on resume.
- */
-
- var ts = through(function (data) {
- this.queue(data)
- }, function () {
- this.queue(null)
- })
-
- var ended = false, actual = []
-
- ts.on('data', actual.push.bind(actual))
- ts.on('end', function () {
- ended = true
- })
-
- ts.pause()
- ts.write(1)
- ts.write(2)
- ts.write(3)
- ts.end()
- assert.deepEqual(actual, [], 'no data written yet, still paused')
- assert.ok(!ended, 'end not emitted yet, still paused')
- ts.resume()
- assert.deepEqual(actual, [1, 2, 3], 'resumed, all data should be delivered')
- assert.ok(ended, 'end should be emitted once all data was delivered')
- assert.end();
- })
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