allow specifying multiple fields

test/index.js

@@ -147,3 +147,39 @@ test ('recursive filter', (t) => {
   const result = util.recursive_filter (raw, [ filter ]);
   t.deepEqual (filtered, result);
 });
+
+test ('recursive filter multifield', (t) => {
+  const raw = [
+    { name: 'foo', f: 'include' },
+    {
+      name:     'include_bar',
+      children: [
+        { name: 'foo' },
+        { name: 'bar' }
+      ]
+    },
+    {
+      name:     'baz',
+      children: [
+        { name: 'include_foo' },
+        { name: 'bar' }
+      ]
+    },
+    {
+      name:     'barbaz',
+      children: [
+        { name: 'foo' },
+        { name: 'bar' }
+      ]
+    }
+  ];
+  const filtered = [
+    { name: 'foo', f: 'include' }
+  ];
+  const filter = {
+    fields:  ['name', 'f'],
+    filter: /foo include/ui
+  };
+  const result = util.recursive_filter (raw, [ filter ]);
+  t.deepEqual (filtered, result);
+});