filer/tests/spec/fs.read.spec.js

175 lines
5.1 KiB
JavaScript

var Filer = require('../../src');
var util = require('../lib/test-utils.js');
var expect = require('chai').expect;
describe('fs.read', function() {
beforeEach(util.setup);
afterEach(util.cleanup);
it('should be a function', function() {
var fs = util.fs();
expect(fs.read).to.be.a('function');
});
it('should read data from a file', function(done) {
var fs = util.fs();
var wbuffer = new Filer.Buffer([1, 2, 3, 4, 5, 6, 7, 8]);
var rbuffer = new Filer.Buffer(wbuffer.length);
rbuffer.fill(0);
fs.open('/myfile', 'w+', function(error, fd) {
if(error) throw error;
fs.write(fd, wbuffer, 0, wbuffer.length, 0, function(error, result) {
if(error) throw error;
expect(result).to.equal(wbuffer.length);
fs.read(fd, rbuffer, 0, rbuffer.length, 0, function(error, result) {
expect(error).not.to.exist;
expect(result).to.equal(rbuffer.length);
expect(wbuffer).to.deep.equal(rbuffer);
done();
});
});
});
});
it('should update the current file position', function(done) {
var fs = util.fs();
var wbuffer = new Filer.Buffer([1, 2, 3, 4, 5, 6, 7, 8]);
var rbuffer = new Filer.Buffer(wbuffer.length);
rbuffer.fill(0);
var _result = 0;
fs.open('/myfile', 'w+', function(error, fd) {
if(error) throw error;
fs.write(fd, wbuffer, 0, wbuffer.length, 0, function(error, result) {
if(error) throw error;
expect(result).to.equal(wbuffer.length);
fs.read(fd, rbuffer, 0, rbuffer.length / 2, undefined, function(error, result) {
if(error) throw error;
_result += result;
fs.read(fd, rbuffer, rbuffer.length / 2, rbuffer.length, undefined, function(error, result) {
if(error) throw error;
_result += result;
expect(error).not.to.exist;
expect(_result).to.equal(rbuffer.length);
expect(wbuffer).to.deep.equal(rbuffer);
done();
});
});
});
});
});
it('should fail to read a directory', function(done) {
var fs = util.fs();
var buf = new Filer.Buffer(20);
var buf2 = new Filer.Buffer(20);
buf.fill(0);
buf2.fill(0);
fs.mkdir('/mydir', function(error) {
if(error) throw error;
fs.open('/mydir', 'r', function(error, fd) {
if(error) throw error;
fs.read(fd, buf, 0, buf.length, 0, function(error, result) {
expect(error).to.exist;
expect(error.code).to.equal('EISDIR');
expect(result).to.equal(0);
expect(buf).to.deep.equal(buf2);
done();
});
});
});
});
});
describe('fs.promises.read', function() {
beforeEach(util.setup);
afterEach(util.cleanup);
it('should be a function', function() {
var fsPromises = util.fs().promises;
expect(fsPromises.read).to.be.a('function');
});
it('should return a promise', function() {
var fsPromises = util.fs().promises;
expect(fsPromises.read()).to.be.a('Promise');
});
it('should read data from a file', function() {
var fsPromises = util.fs().promises;
var wbuffer = new Filer.Buffer([1, 2, 3, 4, 5, 6, 7, 8]);
var rbuffer = new Filer.Buffer(wbuffer.length);
var fdesc;
rbuffer.fill(0);
return fsPromises.open('/myfile', 'w+')
.then((fd)=>{
fdesc=fd;
return fsPromises.write(fd, wbuffer, 0, wbuffer.length, 0);
})
.then((result)=>{
expect(result).to.equal(wbuffer.length);
return fsPromises.read(fdesc, rbuffer,0,rbuffer.length,0);
})
.then((result)=>{
expect(result).to.equal(rbuffer.length);
expect(wbuffer).to.deep.equal(rbuffer);
})
;
});
it('should update the current file position', function() {
var fsPromises = util.fs().promises;
var wbuffer = new Filer.Buffer([1, 2, 3, 4, 5, 6, 7, 8]);
var rbuffer = new Filer.Buffer(wbuffer.length);
rbuffer.fill(0);
var _result = 0;
var fdesc;
return fsPromises.open('/myfile', 'w+')
.then((fd)=>{
fdesc=fd;
return fsPromises.write(fd, wbuffer, 0, wbuffer.length, 0 );
})
.then((result)=>{
expect(result).to.equal(wbuffer.length);
return fsPromises.read(fdesc, rbuffer, 0, rbuffer.length / 2, undefined);
})
.then((result)=>{
_result += result;
return fsPromises.read(fdesc,rbuffer,rbuffer.length / 2, rbuffer.length, undefined);
})
.then((result)=>{
_result+=result;
expect(_result).to.equal(rbuffer.length);
expect(wbuffer).to.deep.equal(rbuffer);
})
;
});
it('should fail to read a directory', function() {
var fsPromises = util.fs().promises;
var buf = new Filer.Buffer(20);
var buf2 = new Filer.Buffer(20);
buf.fill(0);
buf2.fill(0);
return fsPromises.mkdir('/mydir')
.then(()=>fsPromises.open('/mydir', 'r'))
.then(fd=>fsPromises.read(fd, buf, 0, buf.length, 0))
.catch((error)=>{
expect(error).to.exist;
expect(error.code).to.equal('EISDIR');
expect(buf).to.deep.equal(buf2);
})
;
});
});