flow like the river

BACK_BACK/node_modules/tree/test/branch.js

@@ -0,0 +1,67 @@
+module('Branch', {
+  
+  setup: function() {
+    this.node1 = new Tree.Node();
+    this.node2 = new Tree.Node();
+    this.node3 = new Tree.Node();
+    this.branch = new Tree.Branch([this.node1, this.node2, this.node3]);
+  },
+  
+  teardown: function() {
+    delete this.node1;
+    delete this.node2;
+    delete this.node3;
+    delete this.branch;
+  }
+  
+});
+
+test('size', function() {
+  equals(this.branch.size(), 3);
+});
+
+test('append node', function() {
+  var node = new Tree.Node({}, []);
+  this.branch.append(node);
+  
+  equals(this.branch.size(), 4);
+  equals(_.last(this.branch.nodes), node);
+  equals(node.branch, this.branch);
+});
+
+test('insert node', function() {
+  var node = new Tree.Node({}, []);
+  this.branch.insert(2, node);
+  
+  equals(this.branch.size(), 4);
+  equals(this.branch.nodes[2], node);
+  equals(node.branch, this.branch);
+  
+  node = new Tree.Node({}, []);
+  this.branch.insert(9999, node);
+  
+  equals(_.last(this.branch.nodes), node);
+  
+  node = new Tree.Node({}, []);
+  this.branch.insert(-1, node);
+  
+  equals(_.first(this.branch.nodes), node);
+});
+
+test('remove node', function() {
+  var node = this.branch.remove(this.node1);
+  
+  equals(this.branch.size(), 2);
+  equals(_.first(this.branch.nodes), this.node2);
+  equals(_.last(this.branch.nodes), this.node3);
+  equals(node, this.node1);
+  equals(node.branch, null);
+});
+
+test('remove node at index', function() {
+  this.branch.removeAtIndex(2);
+  
+  equals(this.branch.size(), 2);
+  equals(_.first(this.branch.nodes), this.node1);
+  equals(_.last(this.branch.nodes), this.node2);
+});