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

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define(["Filer"], function(Filer) {
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describe('fs.read', function() {
beforeEach(function() {
this.db_name = mk_db_name();
this.fs = new Filer.FileSystem({
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name: this.db_name,
flags: 'FORMAT'
});
});
afterEach(function() {
indexedDB.deleteDatabase(this.db_name);
delete this.fs;
});
it('should be a function', function() {
expect(typeof this.fs.read).toEqual('function');
});
it('should read data from a file', function() {
var complete = false;
var _error, _result;
var that = this;
var wbuffer = new Uint8Array([1, 2, 3, 4, 5, 6, 7, 8]);
var rbuffer = new Uint8Array(wbuffer.length);
that.fs.open('/myfile', 'w+', function(error, result) {
if(error) throw error;
var fd = result;
that.fs.write(fd, wbuffer, 0, wbuffer.length, 0, function(error, result) {
if(error) throw error;
that.fs.read(fd, rbuffer, 0, rbuffer.length, 0, function(error, result) {
_error = error;
_result = result;
complete = true;
});
});
});
waitsFor(function() {
return complete;
}, 'test to complete', DEFAULT_TIMEOUT);
runs(function() {
expect(_error).toEqual(null);
expect(_result).toEqual(rbuffer.length);
expect(typed_array_equal(wbuffer, rbuffer)).toEqual(true);
});
});
it('should update the current file position', function() {
var complete = false;
var _error, _result;
var that = this;
var wbuffer = new Uint8Array([1, 2, 3, 4, 5, 6, 7, 8]);
var rbuffer = new Uint8Array(wbuffer.length);
_result = 0;
that.fs.open('/myfile', 'w+', function(error, result) {
if(error) throw error;
var fd = result;
that.fs.write(fd, wbuffer, 0, wbuffer.length, 0, function(error, result) {
if(error) throw error;
that.fs.read(fd, rbuffer, 0, rbuffer.length / 2, undefined, function(error, result) {
if(error) throw error;
_result += result;
that.fs.read(fd, rbuffer, rbuffer.length / 2, rbuffer.length, undefined, function(error, result) {
if(error) throw error;
_result += result;
complete = true;
});
});
});
});
waitsFor(function() {
return complete;
}, 'test to complete', DEFAULT_TIMEOUT);
runs(function() {
expect(_error).toEqual(null);
expect(_result).toEqual(rbuffer.length);
expect(typed_array_equal(wbuffer.buffer, rbuffer.buffer)).toEqual(true);
});
});
});
});