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update README + tests #3

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3939950
change merge test to use tape
mixmix Feb 17, 2022
b5c2deb
update README to warn users more clearly about merge compare === 0
mixmix Feb 17, 2022
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2 changes: 2 additions & 0 deletions .gitignore
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Original file line number Diff line number Diff line change
@@ -0,0 +1,2 @@
node_modules
package-lock.json
9 changes: 5 additions & 4 deletions README.md
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Expand Up @@ -25,10 +25,11 @@ pull(

### merge(left, right, compare?)

return a stream that is the merge of left and right streams.
merge pulls a chunk from both `left` and `right` and then
compares them. `compare` has the same signature as `Array#sort(compare)`.
If the two chunks are compared the same, the chunk from the right stream
Return a stream that is the merge of left and right streams.

merge pulls a chunk from both `left` and `right` and then compares them.
`compare` has a similar signature as `Array#sort(compare)`
**but if the two chunks are compared the same**, the chunk from the right stream
is taken, but the left chunk is dropped.
Otherwise, the lowest chunk is passed to the stream.

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19 changes: 8 additions & 11 deletions test/index.js
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Original file line number Diff line number Diff line change
@@ -1,4 +1,3 @@

var tape = require('tape')
var pull = require('pull-stream')

Expand All @@ -9,7 +8,7 @@ tape('empty', function (t) {
pull(
merge(pull.values([]), pull.values([])),
pull.collect(function (err, ary) {
console.log(ary)
// console.log(ary)
t.deepEqual(ary, [])
t.end()
})
Expand All @@ -22,7 +21,7 @@ tape('equal', function (t) {
pull(
merge(pull.values([1]), pull.values([1])),
pull.collect(function (err, ary) {
console.log(ary)
// console.log(ary)
t.deepEqual(ary, [1])
t.end()
})
Expand All @@ -35,7 +34,7 @@ tape('different', function (t) {
pull(
merge(pull.values([1]), pull.values([2])),
pull.collect(function (err, ary) {
console.log(ary)
// console.log(ary)
t.deepEqual(ary, [1, 2])
t.end()
})
Expand All @@ -48,37 +47,35 @@ tape('different', function (t) {
pull(
merge(pull.values([2, 3]), pull.values([1])),
pull.collect(function (err, ary) {
console.log(ary)
// console.log(ary)
t.deepEqual(ary, [1, 2, 3])
t.end()
})
)

})

return


// return
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allowed these tests below here to run

tape('simple', function (t) {

pull(
merge(pull.values([0, 2, 4, 6]), pull.values([1,3,5,7])),
pull.collect(function (err, ary) {
console.log(ary)
// console.log(ary)
t.deepEqual(ary, [0,1,2,3,4,5,6,7])
t.end()
})
)

})

return
// return
tape('overwrite', function (t) {
pull(
merge(pull.values([0, 2, 3, 5, 6]), pull.values([1,4,5,7])),
pull.collect(function (err, ary) {
t.deepEqual(ary, [0,1,2,3,4,5,6,7])
console.log(ary)
// console.log(ary)
t.end()
})
)
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24 changes: 14 additions & 10 deletions test/merge.js
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Original file line number Diff line number Diff line change
@@ -1,15 +1,19 @@
var async = require('interleavings')
var pull = require('pull-stream')
var assert = require('assert')
var tape = require('tape')
var merge = require('../')

async.test(strange, function (err, results, stats) {
console.log(results)
assert.equal(stats.failures, 0)
console.log('passed')
tape('merge.js', t => {
t.plan(101)
async.test(strange(t), function (err, results, stats) {
// console.log(results)
t.equal(stats.failures, 0, 'no failures')
})

function strange (async) {
})

function strange (t) {
return function (async) {

function p (read) {
return function (abort, cb) {
Expand All @@ -29,20 +33,20 @@ function strange (async) {
function (read) {
return function (abort, cb) {
read(abort, function (end, data) {
console.log(end, data)
// console.log(end, data)
cb(end, data)
})
}
},
pull.collect(function (err, ary) {
console.log(ary)
// console.log(ary)

assert.deepEqual(ary, [1,2,3,4,5,6,7,8,9,10,11,12])
t.deepEqual(ary, [1,2,3,4,5,6,7,8,9,10,11,12])
async.done()
})
)

}
}

//strange(async(17, function (err, result) {
// if(result.error)
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