100 lines
2.9 KiB
JavaScript
100 lines
2.9 KiB
JavaScript
var util = require('../lib/test-utils.js');
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var expect = require('chai').expect;
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describe('fs.read', function() {
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beforeEach(util.setup);
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afterEach(util.cleanup);
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it('should be a function', function() {
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var fs = util.fs();
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expect(fs.read).to.be.a('function');
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});
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it('should read data from a file', function(done) {
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var fs = util.fs();
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var wbuffer = Buffer.from([1, 2, 3, 4, 5, 6, 7, 8]);
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var rbuffer = Buffer.alloc(wbuffer.length);
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fs.open('/myfile', 'w+', function(error, fd) {
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if(error) throw error;
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fs.write(fd, wbuffer, 0, wbuffer.length, 0, function(error, result) {
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if(error) throw error;
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expect(result).to.equal(wbuffer.length);
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fs.read(fd, rbuffer, 0, rbuffer.length, 0, function(error, result) {
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expect(error).not.to.exist;
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expect(result).to.equal(rbuffer.length);
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expect(wbuffer).to.deep.equal(rbuffer);
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done();
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});
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});
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});
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});
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it('should update the current file position', function(done) {
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var fs = util.fs();
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var wbuffer = Buffer.from([1, 2, 3, 4, 5, 6, 7, 8]);
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var rbuffer = Buffer.alloc(wbuffer.length);
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var _result = 0;
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fs.open('/myfile', 'w+', function(error, fd) {
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if(error) throw error;
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fs.write(fd, wbuffer, 0, wbuffer.length, 0, function(error, result) {
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if(error) throw error;
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expect(result).to.equal(wbuffer.length);
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fs.read(fd, rbuffer, 0, rbuffer.length / 2, undefined, function(error, result) {
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if(error) throw error;
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_result += result;
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fs.read(fd, rbuffer, rbuffer.length / 2, rbuffer.length, undefined, function(error, result) {
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if(error) throw error;
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_result += result;
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expect(error).not.to.exist;
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expect(_result).to.equal(rbuffer.length);
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expect(wbuffer).to.deep.equal(rbuffer);
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done();
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});
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});
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});
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});
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});
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it('should fail to read a directory', function(done) {
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var fs = util.fs();
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var buf = Buffer.alloc(20);
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var buf2 = Buffer.alloc(20);
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fs.mkdir('/mydir', function(error) {
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if(error) throw error;
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fs.open('/mydir', 'r', function(error, fd) {
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if(error) throw error;
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fs.read(fd, buf, 0, buf.length, 0, function(error, result) {
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expect(error).to.exist;
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expect(error.code).to.equal('EISDIR');
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expect(result).to.equal(0);
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expect(buf).to.deep.equal(buf2);
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done();
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});
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});
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});
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});
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it('should fail to read a file that does not exist', function(done) {
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var fs = util.fs();
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var fd = 0;
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var rbuffer = Buffer.alloc(8);
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fs.read(fd, rbuffer, 0, rbuffer.length, 0, function(error, result) {
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expect(error).to.exist;
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expect(result).not.to.exist;
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expect(error.code).to.equal('EBADF');
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done();
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});
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});
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});
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