slice-file/test/cb.js

stream file slices by line number indexes

var test = require('tap').test;
var lf = require('../');

test('slice callback', function (t) {
    t.plan(1);
    
    var file = __dirname + '/data/lines.txt';
    lf(file).slice(4,6, function (err, lines) {
        if (err) t.fail(err);
        t.deepEqual(lines.map(String), [ 'five\n', 'six\n' ]);
    });
});

test('implicit slice 0 callback', function (t) {
    t.plan(1);
    
    var file = __dirname + '/data/lines.txt';
    lf(file).slice(function (err, lines) {
        if (err) t.fail(err);
        var res = lines.map(String);
        t.deepEqual(res, [
            "\n", "two\n", "three\n", "\n",
            "five\n", "six\n", "\n"
        ]);
    });
});