search index function

test/index.js

@@ -179,7 +179,7 @@ test ('recursive filter multifield', (t) => {
   ];
   const filtered = [ { name: 'foo', f: 'include' } ];
   const filter = {
-    fields:  [
+    field:  [
       'name',
       'f'
     ],
@@ -189,15 +189,6 @@ test ('recursive filter multifield', (t) => {
   t.deepEqual (filtered, result);
 });
 
-test ('recursive filter multifield input error', (t) => {
-  t.notThrows (() => {
-    util.recursive_filter (
-      [ { foo: 'bar' } ],
-      [ { fields: '', field: 'foo', filter: /a/u } ]
-    );
-  });
-});
-
 test ('recursive filter undefined multifield', (t) => {
   const res = util.recursive_filter (
     [ { foo: 'bar' } ],
@@ -213,3 +204,50 @@ test ('recursive filter undefined multifield', (t) => {
   );
   t.deepEqual (res, []);
 });
+
+test ('recursive filter multifield index', (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',
+      search_index: 'foo include'
+    }
+  ];
+
+  util.filter_index (raw, [
+    'name',
+    'f'
+  ]);
+
+  const filter = {
+    field:  'search_index',
+    filter: /foo include/ui
+  };
+  const result = util.recursive_filter (raw, [ filter ]);
+  t.deepEqual (filtered, result);
+});