Simple implmentation of Stream.Readable and Stream.Writable holding the data in memory.
npm install memory-streamsStream.Readable and Stream.Writable abstract classes from node.js. You can use the classes provided to store the result of reading and writing streams in memory. This can be useful when you need pipe your test output for later inspection or to stream files from the web into memory without have to use temporary files on disk.Forked from https://github.com/paulja/memory-streams-js to be modified
so that .end() calls emit a finish event.
``bash`
npm install memory-streams --save
class and piping:`js
var streams = require('memory-streams');// Initialize with the string
var reader = new streams.ReadableStream('Hello World\n');
// Send all output to stdout
reader.pipe(process.stdout); // outputs: "Hello World\n"
// Add more data to the stream
reader.append('Hello Universe\n'); // outputs "Hello Universe\n";
`Using the
class and reading manually:`js
var streams = require('memory-streams');// Initialize with the string
var reader = new streams.ReadableStream('Hello World\n');
// Add more data to the stream
reader.append('Hello Universe\n'); // outputs "Hello Universe\n";
// Read the data out
console.log(reader.read().toString()); // outputs: "Hello World\nHello Universe\n"
`
Using the class and piping the contents of a file:`js
var streams = require('memory-streams')
, fs = require('fs');// Pipe
var reader = fs.createReadStream('index.js');
var writer = new streams.WritableStream();
reader.pipe(writer);
reader.on('readable', function() {
// Output the content as a string
console.log(writer.toString());
// Output the content as a Buffer
console.log(writer.toBuffer());
});
`
You can also call the method directly to store data to the stream:`js
var streams = require('memory-streams');// Write method
var writer = new streams.WritableStream();
writer.write('Hello World\n');
// Output the content as a string
console.log(writer.toString()); // Outputs: "Hello World\n"
``For more examples you can look at the tests for the module.
Copyright (c) 2017 Paul Jackson
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