Add testing OT type

The previously failing tests used this type.

Author: Thomas Scholtes

.gitignore

@@ -1,6 +1,4 @@
 *.swp
 .DS_Store
-test/*.js
-test/**/*.js
 node_modules
 webclient/*

test/support/ot_number.js

@@ -0,0 +1,56 @@
+/**
+ * Simple OT representing a number.
+ *
+ * Snapshots and operations are just integers. Applying an operation to an
+ * integer corresponds to adding the number. It supports inversion.
+ *
+ * It is used mainly for testing
+ */
+module.exports = {
+  name: 'simple-number',
+  uri:  'http://sharejs.org/types/simple-number',
+
+  /**
+   * Creates snapshot with initial data
+   *
+   * @param  {Number} [initial=0]
+   * @return {Number}
+   */
+  create: function(initial) {
+    if (initial == null)
+      initial = 0;
+    return initial;
+  },
+
+  /**
+   * Apply an operation to a snapshot and return new snapshot.
+   */
+  apply: function(snapshot, op) {
+    return snapshot + op;
+  },
+
+  /**
+   * Compose operations
+   */
+  transform: function(op1, op2) {
+    return op1 + op2;
+  },
+
+  invert: function(operation) {
+    return -operation;
+  },
+
+  /**
+   * Mixin to manipulate snapshots
+   *
+   * The receiver of this mixin must implement getSnapshot() and
+   * submitOp(operation, [callback]).
+   */
+  api: {
+    get: function() { return this.getSnapshot() },
+    add: function(value, callback) {
+      return this.submitOp(value, callback);
+    }
+  }
+};
+