Added support for string-based matchers for step definitions.

README.md

@@ -34,6 +34,7 @@ Cucumber.js is still a work in progress. Here is its current status.
 | [Undefined steps](https://github.com/cucumber/cucumber-tck/blob/master/undefined_steps.feature)                               | Done                |
 | [Wire protocol](https://github.com/cucumber/cucumber-tck/blob/master/wire_protocol.feature)                                   | To do               |
 | [World](https://github.com/cucumber/cucumber-tck/blob/master/world.feature)                                                   | Done                |
+| [String defined step definitions](https://github.com/cucumber/cucumber-tck/blob/master/stringdefined.feature)                                                   | Done                |
 
 1. Not certified by [Cucumber TCK](https://github.com/cucumber/cucumber-tck) yet.
 2. Considered for removal from [Cucumber TCK](https://github.com/cucumber/cucumber-tck).

features/step_definitions/cucumber_steps.js

@@ -156,6 +156,10 @@ setTimeout(callback.pending, 10);\
     callback();
   });
 
+  Given('a feature is defined with a string', function( callback ) {
+  	callback();
+  });
+
   When(/^Cucumber executes the scenario$/, function(callback) {
     this.runFeature({}, callback);
   });
@@ -219,6 +223,22 @@ callback();\
     this.runFeature({tags: [tag1, '~' + tag2, '~' + tag3]}, callback);
 });
 
+  When('Cucumber executes scenarios with parameter $param1 and $param2 are not equal in a string', function( param1, param2, callback ) {
+  	if( param1 != param2 ) {
+  		callback();
+  	} else {
+  		throw(new Error('Params were equal'));
+  	}
+  });
+
+  When('Cucumber executes scenarios with parameter $param1 and $param2 are equal in a string', function( param1, param2, callback ) {
+  	if( param1 == param2 ) {
+  		callback();
+  	} else {
+  		throw(new Error('Params were equal'));
+  	}
+  });
+
   Then(/^the scenario passes$/, function(callback) {
     this.assertPassedScenario();
     callback();
@@ -333,5 +353,9 @@ callback();\
     this.assertExecutedNumberedScenarios(2, 3, 4);
     callback();
   });
+
+  Then('The string-defined scenario is finished', function(callback) {
+  	callback();
+  });
 };
 module.exports = cucumberSteps;

lib/cucumber/support_code/step_definition.js

@@ -1,6 +1,23 @@
 var StepDefinition = function(regexp, code) {
   var Cucumber = require('../../cucumber');
 
+  var constructor = function() {
+    // Converts a string to a proper regular expression
+    var parseRegexString = function( regexString ) {
+
+      // Replace the $VARIABLES with the correct regex.
+      regexString = regexString.replace(/\$[a-zA-Z0-9]+/g, '([^"]*)');
+      return new RegExp( regexString );
+    }
+
+    if( typeof(regexp)=='string' ) {
+      // regexp is a string, convert it to a regexp.
+      regexp = parseRegexString(regexp);
+    }
+  }
+
+  constructor();
+
   var self = {
     matchesStepName: function matchesStepName(stepName) {
       return regexp.test(stepName);