flow like the river

VISUALIZACION/node_modules/tree/test/tree.js

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+module('Tree', {
+  
+  setup: function() {
+    this.branch = new Tree.Branch([
+      new Tree.Node(),
+      new Tree.Node(),
+      new Tree.Node()
+    ]);
+    
+    this.node = new Tree.Node(this.branch);
+    
+    this.tree = new Tree.Root(
+      new Tree.Branch([
+        new Tree.Node(new Tree.Branch([
+          new Tree.Node(),
+          new Tree.Node()
+        ]), {}),
+        new Tree.Node(new Tree.Branch([
+          new Tree.Node()
+        ]), {}),
+        new Tree.Node(new Tree.Branch([
+          new Tree.Node(),
+          new Tree.Node(),
+          this.node,
+          new Tree.Node()
+        ]), {})
+      ])
+    );
+  },
+  
+  teardown: function() {
+    delete this.branch;
+    delete this.node;
+    delete this.tree;
+  }
+  
+});
+
+test('find node', function() {
+  var node = new Tree.Node();
+  
+  equals(this.tree.find(this.node.id), this.node);
+  equals(this.tree.find(node.id), null);
+});
+
+test('insert node', function() {
+  var node = new Tree.Node();
+  this.tree.insert(node, this.node.id);
+  
+  equals(this.node.children.size(), 4);
+  equals(_.last(this.node.children.nodes), node);
+  equals(node.branch, this.branch);
+  equals(this.tree.find(node.id), node);
+});
+
+test('insert node at index', function() {
+  var node = new Tree.Node();
+  this.tree.insert(node, this.node.id, 1);
+  
+  equals(this.node.children.size(), 4);
+  equals(this.node.children.nodes[1], node);
+  equals(node.branch, this.branch);
+  equals(this.tree.find(node.id), node);
+});
+
+test('set index', function() {
+  this.tree.setIndex(this.node.id, 1);
+  
+  equals(this.node.branch.size(), 4);
+  equals(this.node.branch.nodes[1], this.node);
+  equals(this.tree.find(this.node.id), this.node);
+});