1 files changed, 33 insertions, 0 deletions
diff --git a/tools/winscope/spec/utils/tree.js b/tools/winscope/spec/utils/tree.js
new file mode 100644
index 000000000..379ebaf46
--- /dev/null
+++ b/tools/winscope/spec/utils/tree.js
@@ -0,0 +1,33 @@
+class Node {
+    constructor(nodeDef, children) {
+        Object.assign(this, nodeDef);
+        this.children = children;
+    }
+}
+
+class DiffNode extends Node {
+    constructor(nodeDef, diffType, children) {
+        super(nodeDef, children);
+        this.diff = { type: diffType };
+    }
+}
+
+function isPrimitive(test) {
+    return test !== Object(test);
+};
+
+function toPlainObject(theClass) {
+    if (isPrimitive(theClass)) {
+        return theClass;
+    } else if (Array.isArray(theClass)) {
+        return theClass.map(item => toPlainObject(item));
+    } else {
+        const keys = Object.getOwnPropertyNames(Object.assign({}, theClass));
+        return keys.reduce((classAsObj, key) => {
+            classAsObj[key] = toPlainObject(theClass[key]);
+            return classAsObj;
+        }, {});
+    }
+}
+
+export { Node, DiffNode, toPlainObject };
+\ No newline at end of file