rafa/test/spec/core/readfile/spec.js

Rafa.js is a Javascript framework for building concurrent applications.

require("../../../core.js")(function(assert, Rafa) {
  var fs = require('fs');
  var readline = require('readline');
  
  suite("Read File", () => {
    test("fast stream", (done) => {
      var stream = Rafa.stream();
      var values = [];

      stream
        .map(line => parseInt(line.replace(/[^\d]/g, ''), 10))
        .each(n => values.push(n))
        .done(() => {
          assert.equal(values.length, 9);
          for (var i=0; i < values.length; i++) 
            assert.equal(values[i], i+1);
          done();
        });

      var rs = fs.createReadStream(__dirname+"/input.txt");
      var rd = readline.createInterface({ input: rs });
      rd.on('line', stream.listener());
      rs.on('error', stream.listener("Error"));
      rd.on('close', stream.listener("Done"));
    });
    
    test("slow stream", (done) => {
      var stream = Rafa.stream();
      var values = [];

      stream
        .map(line => {
          var f = Rafa.future();
          setTimeout(() => f.resolve(parseInt(line.replace(/[^\d]/g, ''), 10)));
          return f.promise;
        })
        .each(n => values.push(n))
        .done(() => {
          assert.equal(values.length, 9);
          for (var i=0; i < values.length; i++) 
            assert.equal(values[i], i+1);
          done();
        });

      var rs = fs.createReadStream(__dirname+"/input.txt");
      var rd = readline.createInterface({ input: rs });
      rd.on('line', stream.listener("Value", 12));
      rs.on('error', stream.listener("Error"));
      rd.on('close', stream.listener("Done"));
    });
  });

});