add grunt coverage

add some tests

.gitignore

 node_modules/
+coverage
+html-report
\ No newline at end of file

Gruntfile.js

+module.exports = function(grunt){
+    grunt.initConfig({
+        mocha_istanbul: {
+            coverage: {
+                src: 'test',
+                options: {
+                    'ui': 'tdd',
+                    'recursive': true,
+                    'reporter': 'mocha-istanbul'
+                }
+            }
+        }       
+    });
+
+    grunt.loadNpmTasks('grunt-mocha-istanbul');
+    grunt.registerTask('coverage', ['mocha_istanbul:coverage']);
+};
\ No newline at end of file

package.json

@@ -19,8 +19,12 @@
   },
   "devDependencies": {
     "expect.js": "*",
+    "grunt": "^0.4.5",
+    "grunt-mocha-istanbul": "^2.2.0",
+    "istanbul": "^0.3.5",
     "memorystream": "^0.3.0",
     "memstream": "*",
-    "mocha": "*"
+    "mocha": "*",
+    "mocha-istanbul": "^0.2.0"
   }
 }

test/index.js

@@ -184,6 +184,34 @@ describe('Context', function() {
     });    
   });
 
+  describe('say number', function() {
+    it('say number', function() {
+      this.context.sayNumber('1234', '#', function() {});
+      expect(this.context.sent.join('')).to.eql('SAY NUMBER 1234 "#"\n');
+    });    
+  });
+
+  describe('say phonetic', function() {
+    it('say phonetic', function() {
+      this.context.sayPhonetic('1234ABCD', '#', function() {});
+      expect(this.context.sent.join('')).to.eql('SAY PHONETIC 1234ABCD "#"\n');
+    });    
+  });
+
+  describe('context dial', function() {
+    it('context dial', function() {
+      this.context.dial('123', 10, 'A', function() {});
+      expect(this.context.sent.join('')).to.eql('EXEC Dial 123,10,A\n');
+    });    
+  });
+
+  describe('say digits', function() {
+    it('say digits', function() {
+      this.context.sayDigits('1234', '#', function() {});
+      expect(this.context.sent.join('')).to.eql('SAY DIGITS 1234 "#"\n');
+    });    
+  });
+
   describe('waitForDigit', function() {
     it('sends with default timeout', function() {
       this.context.waitForDigit(function() {});
@@ -203,6 +231,13 @@ describe('Context', function() {
     });
   });
 
+  describe('answer', function() {
+    it('sends "ANSWER\\n"', function() {
+      this.context.answer();
+      expect(this.context.sent.join('')).to.eql('ANSWER\n');
+    });
+  });
+
   describe('events', function() {
     describe('error', function () {
       it('is emitted when socket emits error', function(done) {