text: var assert = require('chai').assert,
      shell = require('..').shell;
  
  /**
   * Mocha BDD interface.
   */
  /** @name describe @function */
  /** @name it @function */
  /** @name before @function */
  /** @name after @function */
  /** @name beforeEach @function */
  /** @name afterEach @function */
  
  describe('shell', function() {
  
      describe('escape()', function() {
  
          var escape = shell.escape;
  
          it('Should wrap values with spaces in double quotes', function() {
              assert.equal(escape('asd abc'), '"asd abc"');
          });
  
          it('Should escape double quote "', function() {
              assert.equal(escape('"asd'), '\\"asd');
          });
  
          it("Should escape single quote '", function() {
              assert.equal(escape("'asd"), "\\'asd");
          });
  
          it('Should escape backslash \\', function() {
              assert.equal(escape('\\asd'), '\\\\asd');
          });
  
          it('Should escape dollar $', function() {
              assert.equal(escape('$asd'), '\\$asd');
          });
  
          it('Should escape backtick `', function() {
              assert.equal(escape('`asd'), '\\`asd');
          });
  
      });
  
      describe('unescape()', function() {
  
          var unescape = shell.unescape;
  
          it('Should strip double quotes at the both ends', function() {
              assert.equal(unescape('"asd"'), 'asd');
          });
  
          it('Should not strip escaped double quotes at the both ends', function() {
              assert.equal(unescape('\\"asd\\"'), '"asd"');
          });
  
      });
  
  });
  