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pull stream spec\nWhat is a pull stream? \n\nThe source stream\n\n* if it is passed a truthy `abort` param, it must call the callback with a truthy `end` param\n* It must not call the callback more than once (before it has been called again)\n\nThe sink stream\n\n* If the callback gets a truthy `end` param, it must not call source again\n* It must not call the source multiple times before getting a callback\n\nBoth sources and sinks should work whether they are called synchronously\nor asynchronously.\n\n\n## install\n\n    npm install pull-stream-spec\n\n## example\n\n```js\nvar test = require('tape')\nvar S = require('pull-stream')\nS.cat = require('pull-cat')\nvar spec = require('../')\n\n// test a source stream\nspec.source(test, S.values.bind(S, [1,2,3]))\n\n// test a sink stream\nfunction mySink () {\n    return S.drain(function onData () {}, function onEnd (err) {\n        // caught error\n    })\n}\nspec.sink(test, mySink)\n\n// compose a pipeline with a through stream that makes assertions\n// about how it is called. Since it is a proxy to a source and sink,\n// it could be used to test either.\ntest('I want to test this sink with special source streams', function (t) {\n    t.plan(1)\n\n    // emit 3 values then error\n    var testSource = S.cat([\n        S.values([1,2,3]),\n        S.error(new Error('test'))\n    ])\n\n    var mySink = S.drain(function onData (d) {}, function onEnd (err) {\n        // caught error, do nothing\n    })\n\n    t.doesNotThrow(\n        S.bind(null,\n            testSource,\n            spec.through(),\n            mySink\n        ),\n        'should not throw'\n    )\n})\n```\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fnichoth%2Fpull-stream-spec","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fnichoth%2Fpull-stream-spec","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fnichoth%2Fpull-stream-spec/lists"}