added test cases

Author: praveenk007

events/code_commit_test.go

@@ -28,6 +28,16 @@ func TestCodeCommitReference(t *testing.T) {
           "ref": "refs/heads/master",
           "created": true
         }
+      `),
+		},
+		{
+			Name: "Deleted CodeCommitReference",
+			Input: []byte(`
+        {
+          "commit": "5c4ef1049f1d27deadbeeff313e0730018be182b",
+          "ref": "refs/heads/master",
+          "deleted": true
+        }
       `),
 		},
 	}
@@ -62,7 +72,12 @@ func TestCodeCommitCodeCommit(t *testing.T) {
               "commit": "5c4ef1049f1d27deadbeeff313e0730018be182b",
               "ref": "refs/heads/master",
               "created": true
-            }
+            },
+			{
+			  "commit": "5c4ef1049f1d27deadbeeff313e0730018be182b",
+			  "ref": "refs/heads/master",
+			  "deleted": true
+        	}
           ]
         }
       `),