filer/tests/spec/fs.appendFile.spec.js

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var Filer = require('../..');
var util = require('../lib/test-utils.js');
var expect = require('chai').expect;
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describe('fs.appendFile', function() {
beforeEach(function(done) {
util.setup(function() {
var fs = util.fs();
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fs.writeFile('/myfile', "This is a file.", { encoding: 'utf8' }, function(error) {
if(error) throw error;
done();
});
});
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});
afterEach(util.cleanup);
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it('should be a function', function() {
var fs = util.fs();
expect(fs.appendFile).to.be.a('function');
});
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it('should append a utf8 file without specifying utf8 in appendFile', function(done) {
var fs = util.fs();
var contents = "This is a file.";
var more = " Appended.";
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fs.appendFile('/myfile', more, function(error) {
if(error) throw error;
fs.readFile('/myfile', 'utf8', function(error, data) {
expect(error).not.to.exist;
expect(data).to.equal(contents + more);
done();
});
});
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});
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it('should append a utf8 file with "utf8" option to appendFile', function(done) {
var fs = util.fs();
var contents = "This is a file.";
var more = " Appended.";
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fs.appendFile('/myfile', more, 'utf8', function(error) {
if(error) throw error;
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fs.readFile('/myfile', 'utf8', function(error, data) {
expect(error).not.to.exist;
expect(data).to.equal(contents + more);
done();
});
});
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});
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it('should append a utf8 file with {encoding: "utf8"} option to appendFile', function(done) {
var fs = util.fs();
var contents = "This is a file.";
var more = " Appended.";
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fs.appendFile('/myfile', more, { encoding: 'utf8' }, function(error) {
if(error) throw error;
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fs.readFile('/myfile', { encoding: 'utf8' }, function(error, data) {
expect(error).not.to.exist;
expect(data).to.equal(contents + more);
done();
});
});
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});
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it('should append a binary file', function(done) {
var fs = util.fs();
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// String and utf8 binary encoded versions of the same thing:
var contents = "This is a file.";
var binary = new Buffer([84, 104, 105, 115, 32, 105, 115, 32, 97, 32, 102, 105, 108, 101, 46]);
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var more = " Appended.";
var binary2 = new Buffer([32, 65, 112, 112, 101, 110, 100, 101, 100, 46]);
var binary3 = new Buffer([84, 104, 105, 115, 32, 105, 115, 32, 97, 32, 102, 105, 108, 101, 46,
32, 65, 112, 112, 101, 110, 100, 101, 100, 46]);
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fs.writeFile('/mybinaryfile', binary, function(error) {
if(error) throw error;
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fs.appendFile('/mybinaryfile', binary2, function(error) {
if(error) throw error;
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fs.readFile('/mybinaryfile', 'ascii', function(error, data) {
expect(error).not.to.exist;
expect(data).to.deep.equal(binary3);
done();
});
});
});
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});
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it('should follow symbolic links', function(done) {
var fs = util.fs();
var contents = "This is a file.";
var more = " Appended.";
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fs.symlink('/myfile', '/myFileLink', function (error) {
if (error) throw error;
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fs.appendFile('/myFileLink', more, 'utf8', function (error) {
if (error) throw error;
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fs.readFile('/myFileLink', 'utf8', function(error, data) {
expect(error).not.to.exist;
expect(data).to.equal(contents + more);
done();
});
});
});
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});
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it('should work when file does not exist, and create the file', function(done) {
var fs = util.fs();
var contents = "This is a file.";
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fs.appendFile('/newfile', contents, { encoding: 'utf8' }, function(error) {
expect(error).not.to.exist;
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fs.readFile('/newfile', 'utf8', function(err, data) {
if(err) throw err;
expect(data).to.equal(contents);
done();
});
});
});
});