1 files changed, 58 insertions, 0 deletions
diff --git a/jstests/core/dbhash.js b/jstests/core/dbhash.js
new file mode 100644
index 00000000000..7fea4b4d50c
--- /dev/null
+++ b/jstests/core/dbhash.js
@@ -0,0 +1,58 @@
+
+a = db.dbhasha;
+b = db.dbhashb;
+
+a.drop();
+b.drop();
+
+// debug SERVER-761
+db.getCollectionNames().forEach( function( x ) { 
+                                v = db[ x ].validate();
+                                if ( !v.valid ) {
+                                    print( x );
+                                    printjson( v );
+                                }
+                                } );
+
+function dbhash( mydb ) {
+    var ret = mydb.runCommand( "dbhash" );
+    assert.commandWorked( ret, "dbhash failure" );
+    return ret;
+}
+
+function gh( coll , mydb ){
+    if ( ! mydb ) mydb = db;
+    var x = dbhash( mydb ).collections[coll.getName()];
+    if ( ! x )
+        return "";
+    return x;
+}
+
+function dbh( mydb ){
+    return dbhash( mydb ).md5;
+}
+
+assert.eq( gh( a ) , gh( b ) , "A1" );
+
+a.insert( { _id : 5 } );
+assert.neq( gh( a ) , gh( b ) , "A2" );
+
+b.insert( { _id : 5 } );
+assert.eq( gh( a ) , gh( b ) , "A3" );
+
+dba = db.getSisterDB( "dbhasha" );
+dbb = db.getSisterDB( "dbhashb" );
+
+dba.dropDatabase();
+dbb.dropDatabase();
+
+assert.eq( gh( dba.foo , dba ) , gh( dbb.foo , dbb ) , "B1" );
+assert.eq( dbh( dba ) , dbh( dbb ) , "C1" );
+
+dba.foo.insert( { _id : 5 } );
+assert.neq( gh( dba.foo , dba ) , gh( dbb.foo , dbb ) , "B2" );
+assert.neq( dbh( dba ) , dbh( dbb ) , "C2" );
+
+dbb.foo.insert( { _id : 5 } );
+assert.eq( gh( dba.foo , dba ) , gh( dbb.foo , dbb ) , "B3" );
+assert.eq( dbh( dba ) , dbh( dbb ) , "C3" );