define(["Filer", "util"], function(Filer, util) {

  describe('fs.exists', function() {
    beforeEach(util.setup);
    afterEach(util.cleanup);

    it('should be a function', function() {
      var fs = util.fs();
      expect(typeof fs.exists).to.equal('function');
    });

    it('should return false if path does not exist', function(done) {
      var fs = util.fs();
      fs.exists('/tmp', function(result) { 
        expect(result).to.exist; 
        expect(result).equals(false);
        done();
      });
    });

    it('should return true if path exists', function(done) {
      var fs = util.fs();

      fs.open('/myfile', 'w', function(err, fd) {
          if(err) throw err;
          fs.close(fd, function(err) {
            if(err) throw err;
            fs.exists('/myfile', function(result) {
              expect(result).to.exist;
              expect(result).equals(true);
              done();
            });
          });
        });
      });

    it('should follow symbolic links and return true for the resulting path', function(done) {
      var fs = util.fs();

      fs.open('/myfile', 'w', function(error, fd) {
        if(error) throw error;
        fs.close(fd, function(error) {
          if(error) throw error;
          fs.symlink('/myfile', '/myfilelink', function(error) {
            if(error) throw error;
            fs.exists('/myfilelink', function(result) {
              expect(result).to.exist;
              expect(result).equals(true);
              done();
            });
          });
        });
      });
    });
  });
});