| 1 | var pull = require('../')
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| 2 | var test = require('tape')
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| 3 |
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| 4 | test('flatten arrays', function (t) {
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| 5 | pull(
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| 6 | pull.values([
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| 7 | [1, 2, 3],
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| 8 | [4, 5, 6],
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| 9 | [7, 8, 9]
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| 10 | ]),
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| 11 | pull.flatten(),
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| 12 | pull.collect(function (err, numbers) {
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| 13 | t.deepEqual([1, 2, 3, 4, 5, 6, 7, 8, 9], numbers)
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| 14 | t.end()
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| 15 | })
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| 16 | )
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| 17 | })
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| 18 |
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| 19 | test('flatten - number of reads', function (t) {
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| 20 | var reads = 0
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| 21 | pull(
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| 22 | pull.values([
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| 23 | pull.values([1, 2, 3]),
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| 24 | ]),
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| 25 | pull.flatten(),
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| 26 | pull.through(function() {
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| 27 | reads++
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| 28 | console.log('READ', reads)
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| 29 | }),
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| 30 | pull.take(2),
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| 31 | pull.collect(function (err, numbers) {
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| 32 | t.deepEqual([1, 2], numbers)
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| 33 | t.equal(reads, 2)
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| 34 | t.end()
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| 35 | })
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| 36 | )
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| 37 |
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| 38 | })
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| 39 | test('flatten stream of streams', function (t) {
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| 40 |
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| 41 | pull(
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| 42 | pull.values([
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| 43 | pull.values([1, 2, 3]),
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| 44 | pull.values([4, 5, 6]),
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| 45 | pull.values([7, 8, 9])
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| 46 | ]),
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| 47 | pull.flatten(),
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| 48 | pull.collect(function (err, numbers) {
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| 49 | t.deepEqual([1, 2, 3, 4, 5, 6, 7, 8, 9], numbers)
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| 50 | t.end()
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| 51 | })
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| 52 | )
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| 53 |
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| 54 | })
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| 55 |
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| 56 | test('flatten stream of broken streams', function (t) {
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| 57 | var _err = new Error('I am broken'), sosEnded
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| 58 | pull(
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| 59 | pull.values([
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| 60 | pull.error(_err)
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| 61 | ], function(err) {
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| 62 | sosEnded = err;
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| 63 | }),
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| 64 | pull.flatten(),
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| 65 | pull.onEnd(function (err) {
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| 66 | t.equal(err, _err)
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| 67 | process.nextTick(function() {
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| 68 | t.equal(sosEnded, null, 'should abort stream of streams')
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| 69 | t.end()
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| 70 | })
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| 71 | })
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| 72 | )
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| 73 | })
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| 74 |
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| 75 | test('abort flatten', function (t) {
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| 76 | var sosEnded, s1Ended, s2Ended
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| 77 | var read = pull(
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| 78 | pull.values([
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| 79 | pull.values([1,2], function(err) {s1Ended = err}),
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| 80 | pull.values([3,4], function(err) {s2Ended = err}),
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| 81 | ], function(err) {
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| 82 | sosEnded = err;
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| 83 | }),
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| 84 | pull.flatten()
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| 85 | )
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| 86 |
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| 87 | read(null, function(err, data) {
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| 88 | t.notOk(err)
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| 89 | t.equal(data,1)
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| 90 | read(true, function(err, data) {
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| 91 | t.equal(err, true)
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| 92 | process.nextTick(function() {
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| 93 | t.equal(sosEnded, null, 'should abort stream of streams')
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| 94 | t.equal(s1Ended, null, 'should abort current nested stream')
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| 95 | t.equal(s2Ended, undefined, 'should not abort queued nested stream')
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| 96 | t.end()
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| 97 | })
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| 98 | })
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| 99 | })
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| 100 | })
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| 101 |
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| 102 | test('abort flatten before 1st read', function (t) {
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| 103 | var sosEnded, s1Ended
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| 104 | var read = pull(
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| 105 | pull.values([
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| 106 | pull.values([1,2], function(err) {s1Ended = err})
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| 107 | ], function(err) {
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| 108 | sosEnded = err;
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| 109 | }),
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| 110 | pull.flatten()
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| 111 | )
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| 112 |
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| 113 | read(true, function(err, data) {
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| 114 | t.equal(err, true)
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| 115 | t.notOk(data)
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| 116 | process.nextTick(function() {
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| 117 | t.equal(sosEnded, null, 'should abort stream of streams')
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| 118 | t.equal(s1Ended, undefined, 'should abort current nested stream')
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| 119 | t.end()
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| 120 | })
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| 121 | })
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| 122 | })
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| 123 |
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| 124 | test('flattern handles stream with normal objects', function (t) {
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| 125 | pull(
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| 126 | pull.values([
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| 127 | [1,2,3], 4, [5,6,7], 8, 9 ,10
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| 128 | ]),
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| 129 | pull.flatten(),
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| 130 | pull.collect(function (err, ary) {
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| 131 | t.deepEqual(ary, [1,2,3,4,5,6,7,8,9,10])
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| 132 | t.end()
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| 133 | })
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| 134 | )
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| 135 | })
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