47 lines
1.2 KiB
JavaScript
47 lines
1.2 KiB
JavaScript
var pipeline = require('../');
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var through = require('through2');
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var split = require('split');
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var concat = require('concat-stream');
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var test = require('tape');
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test('pop', function (t) {
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var expected = {};
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expected.replacer = [ '333', '444' ];
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t.plan(3);
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var a = split();
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var b = through.obj(function (row, enc, next) {
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this.push(JSON.parse(row));
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next();
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});
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var c = through.obj(function (row, enc, next) {
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this.push(row.x);
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next();
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});
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var d = through.obj(function (x, enc, next) {
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this.push(String(x * 111));
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next();
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});
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var replacer = through(function (buf, enc, next) {
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var ex = expected.replacer.shift();
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t.equal(buf.toString(), ex);
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this.push(buf.toString('hex') + '\n');
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if (expected.replacer.length === 0) {
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stream.pop();
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}
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next();
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});
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var stream = pipeline([ a, b, c, d, replacer ]);
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stream.pipe(concat(function (body) {
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t.deepEqual(body.toString(), '333333\n343434\n555666');
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}));
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stream.write('{"x":3}\n');
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stream.write('{"x":4}\n');
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stream.write('{"x":5}\n');
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stream.write('{"x":6}');
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stream.end();
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});
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