Parent nodes now display an error when a child node is invalid

src/js/Node.js

@@ -109,6 +109,21 @@ Node.prototype.findNode = function (jsonPath) {
   return node;
 };
 
+/**
+ * Find all parents of this node. The parents are ordered from root node towards
+ * the original node.
+ * @return {Array.<Node>}
+ */
+Node.prototype.findParents = function () {
+  var parents = [];
+  var parent = this.parent;
+  while (parent) {
+    parents.unshift(parent);
+    parent = parent.parent;
+  }
+  return parents;
+};
+
 /**
  *
  * @param {{dataPath: string, keyword: string, message: string, params: Object, schemaPath: string} | null} error

src/js/treemode.js

@@ -371,15 +371,36 @@ treemode.validate = function () {
   var root = this.node;
   if (!valid) {
   this.errorNodes = this._validate.errors
-        .map(function (error) {
-          var node = root.findNode(error.dataPath);
-          if (node) {
-            node.setError(error);
+      .map(function findNode (error) {
+        return {
+          node: root.findNode(error.dataPath),
+          error: error
         }
-          return node;
       })
-        .filter(function (node) {
-          return node != null
+      .filter(function hasNode (entry) {
+        return entry.node != null
+      })
+      .reduce(function expandParents (all, entry) {
+        // expand parents, then merge such that parents come first and
+        // original entries last
+        return entry.node
+            .findParents()
+            .map(function (parent) {
+              return {
+                node: parent,
+                error: {
+                  message: parent.type === 'object'
+                      ? 'Contains invalid properties' // object
+                      : 'Contains invalid items'      // array
+                }
+              };
+            })
+            .concat(all, [entry]);
+      }, [])
+      // TODO: dedupe
+      .map(function setError (entry) {
+        entry.node.setError(entry.error);
+        return entry.node;
       });
   }
   else {

test/util.test.js

@@ -57,5 +57,27 @@ describe('util', function () {
 
   });
 
+  describe('jsonPath', function () {
+
+    it ('should parse a json path', function () {
+      assert.deepEqual(util.parsePath(''), []);
+      assert.deepEqual(util.parsePath('.foo'), ['foo']);
+      assert.deepEqual(util.parsePath('.foo.bar'), ['foo', 'bar']);
+      assert.deepEqual(util.parsePath('.foo[2]'), ['foo', 2]);
+      assert.deepEqual(util.parsePath('.foo[2].bar'), ['foo', 2, 'bar']);
+      assert.deepEqual(util.parsePath('.foo["prop with spaces"]'), ['foo', 'prop with spaces']);
+    });
+
+    it ('should throw an exception in case of an invalid path', function () {
+      assert.throws(function () {util.parsePath('.')}, /Error/);
+      assert.throws(function () {util.parsePath('[')}, /Error/);
+      assert.throws(function () {util.parsePath('[]')}, /Error/);
+      assert.throws(function () {util.parsePath('.[]')}, /Error/);
+      assert.throws(function () {util.parsePath('["23]')}, /Error/);
+      assert.throws(function () {util.parsePath('.foo bar')}, /Error/);
+    });
+
+  });
+
   // TODO: thoroughly test all util methods
 });