1 files changed, 45 insertions, 0 deletions
diff --git a/jstests/group4.js b/jstests/group4.js
new file mode 100644
index 0000000..e75c0d1
--- /dev/null
+++ b/jstests/group4.js
@@ -0,0 +1,45 @@
+
+t = db.group4
+t.drop();
+
+function test( c , n ){
+    var x = {};
+    c.forEach( 
+        function(z){
+            assert.eq( z.count , z.values.length , n + "\t" + tojson( z ) );
+        }
+    );
+}
+
+t.insert({name:'bob',foo:1})
+t.insert({name:'bob',foo:2})
+t.insert({name:'alice',foo:1})
+t.insert({name:'alice',foo:3})
+t.insert({name:'fred',foo:3})
+t.insert({name:'fred',foo:4})
+
+x = t.group( 
+    {
+        key: {foo:1},
+        initial: {count:0,values:[]},
+        reduce: function (obj, prev){
+            prev.count++
+            prev.values.push(obj.name)
+        }
+    } 
+);
+test( x , "A" );
+
+x = t.group(
+    {
+        key: {foo:1},
+        initial: {count:0},
+        reduce: function (obj, prev){
+            if (!prev.values) {prev.values = [];}
+            prev.count++;
+            prev.values.push(obj.name);
+        }
+    }
+);
+test( x , "B" );
+