1 files changed, 73 insertions, 0 deletions
diff --git a/jstests/core/mr3.js b/jstests/core/mr3.js
new file mode 100644
index 00000000000..3b0a918a4f3
--- /dev/null
+++ b/jstests/core/mr3.js
@@ -0,0 +1,73 @@
+
+t = db.mr3;
+t.drop();
+
+t.save( { x : 1 , tags : [ "a" , "b" ] } );
+t.save( { x : 2 , tags : [ "b" , "c" ] } );
+t.save( { x : 3 , tags : [ "c" , "a" ] } );
+t.save( { x : 4 , tags : [ "b" , "c" ] } );
+
+m = function( n , x ){
+    x = x || 1;
+    this.tags.forEach(
+        function(z){
+            for ( var i=0; i<x; i++ )
+                emit( z , { count : n || 1 } );
+        }
+    );
+};
+
+r = function( key , values ){
+    var total = 0;
+    for ( var i=0; i<values.length; i++ ){
+        total += values[i].count;
+    }
+    return { count : total };
+};
+
+res = t.mapReduce( m , r , { out : "mr3_out" } );
+z = res.convertToSingleObject()
+
+assert.eq( 3 , Object.keySet( z ).length , "A1" );
+assert.eq( 2 , z.a.count , "A2" );
+assert.eq( 3 , z.b.count , "A3" );
+assert.eq( 3 , z.c.count , "A4" );
+
+res.drop();
+
+res = t.mapReduce( m , r , { out : "mr3_out" , mapparams : [ 2 , 2 ] } );
+z = res.convertToSingleObject()
+
+assert.eq( 3 , Object.keySet( z ).length , "B1" );
+assert.eq( 8 , z.a.count , "B2" );
+assert.eq( 12 , z.b.count , "B3" );
+assert.eq( 12 , z.c.count , "B4" );
+
+res.drop();
+
+// -- just some random tests
+
+realm = m;
+
+m = function(){
+    emit( this._id , 1 );
+}
+res = t.mapReduce( m , r , { out : "mr3_out" } );
+res.drop();
+
+m = function(){
+    emit( this._id , this.xzz.a );
+}
+
+before = db.getCollectionNames().length;
+assert.throws( function(){ t.mapReduce( m , r , { out : "mr3_out" } ); } );
+assert.eq( before , db.getCollectionNames().length , "after throw crap" );
+
+
+m = realm;
+r = function( k , v ){
+    return v.x.x.x;
+}
+before = db.getCollectionNames().length;
+assert.throws( function(){ t.mapReduce( m , r , "mr3_out"  ) } )
+assert.eq( before , db.getCollectionNames().length , "after throw crap" );