filer/tests/spec/fs.open.spec.js

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var util = require('../lib/test-utils.js');
var expect = require('chai').expect;
var constants = require('../../src/constants.js');
describe('fs.open', function() {
beforeEach(util.setup);
afterEach(util.cleanup);
it('should be a function', function() {
var fs = util.fs();
expect(fs.open).to.be.a('function');
});
it('should return an error if the parent path does not exist', function(done) {
var fs = util.fs();
fs.open('/tmp/myfile', 'w+', function(error, result) {
expect(error).to.exist;
expect(error.code).to.equal('ENOENT');
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expect(result).not.to.exist;
done();
});
});
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it('should return an error when flagged for read and the path does not exist', function(done) {
var fs = util.fs();
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fs.open('/myfile', 'r+', function(error, result) {
expect(error).to.exist;
expect(error.code).to.equal('ENOENT');
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expect(result).not.to.exist;
done();
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});
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});
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it('should return an error when flagged for write and the path is a directory', function(done) {
var fs = util.fs();
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fs.mkdir('/tmp', function(error) {
if(error) throw error;
fs.open('/tmp', 'w', function(error, result) {
expect(error).to.exist;
expect(error.code).to.equal('EISDIR');
expect(result).not.to.exist;
done();
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});
});
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});
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it('should return an error when flagged for append and the path is a directory', function(done) {
var fs = util.fs();
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fs.mkdir('/tmp', function(error) {
if(error) throw error;
fs.open('/tmp', 'a', function(error, result) {
expect(error).to.exist;
expect(error.code).to.equal('EISDIR');
expect(result).not.to.exist;
done();
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});
});
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});
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it('should return a unique file descriptor', function(done) {
var fs = util.fs();
var fd1;
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fs.open('/file1', 'w+', function(error, fd) {
if(error) throw error;
expect(error).not.to.exist;
expect(fd).to.be.a('number');
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fs.open('/file2', 'w+', function(error, fd) {
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if(error) throw error;
expect(error).not.to.exist;
expect(fd).to.be.a('number');
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expect(fd).not.to.equal(fd1);
done();
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});
});
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});
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it('should return the argument value of the file descriptor index matching the value set by the first useable file descriptor constant', function(done) {
var fs = util.fs();
var firstFD = constants.FIRST_DESCRIPTOR;
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fs.open('/file1', 'w+', function(error, fd) {
if(error) throw error;
expect(fd).to.equal(firstFD);
done();
});
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});
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it('should create a new file when flagged for write', function(done) {
var fs = util.fs();
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fs.open('/myfile', 'w', function(error) {
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if(error) throw error;
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fs.stat('/myfile', function(error, result) {
expect(error).not.to.exist;
expect(result).to.exist;
expect(result.type).to.equal('FILE');
done();
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});
});
});
it('should create a new file, when flagged for write, and set the mode to the passed value', function(done) {
var fs = util.fs();
fs.open('/myfile', 'w', 0o777, function(error) {
if(error) throw error;
fs.stat('/myfile', function(error, result) {
expect(error).not.to.exist;
expect(result).to.exist;
expect(result.mode).to.exist;
expect(result.mode & 0o777).to.equal(0o777);
done();
});
});
});
it('should create a new file, but no mode is passed, so the default value of 644 should be seen', function(done) {
var fs = util.fs();
fs.open('/myfile', 'w', function(error) {
if(error) throw error;
fs.stat('/myfile', function(error, result) {
expect(error).not.to.exist;
expect(result).to.exist;
expect(result.mode).to.exist;
expect(result.mode & 0o644).to.equal(0o644);
done();
});
});
});
/**
* This test is currently correct per our code, but incorrect according to the spec.
* When we fix https://github.com/filerjs/filer/issues/314 we'll have to update this.
*/
it('should error if an ofd\'s node goes away while open', function(done) {
var fs = util.fs();
fs.writeFile('/myfile', 'data', function(error) {
if(error) throw error;
fs.open('/myfile', 'r', function(error, fd) {
if(error) throw error;
// Delete the file while it's still open
fs.unlink('/myfile', function(error) {
if(error) throw error;
// This should fail now, since fd points to a bad node
fs.fstat(fd, function(error, result) {
expect(error).to.exist;
expect(error.code).to.equal('EBADF');
expect(result).not.to.exist;
fs.close(fd);
done();
});
});
});
});
});
});