check that _id is unique

1 files changed, 33 insertions, 0 deletions

diff --git a/jstests/uniqueness.js b/jstests/uniqueness.js
new file mode 100644
index 00000000000..6cda7df2bbe
--- /dev/null
+++ b/jstests/uniqueness.js
@@ -0,0 +1,33 @@
+//db=connect("192.168.58.1/test", u , p);
+
+t = db.foo;
+
+t.drop();
+
+// test uniqueness of _id
+
+t.ensureIndex({_id:1});
+
+t.save( { _id : 3 } );
+assert( !db.getLastError(), 1 );
+
+// this should yield an error
+t.insert( { _id : 3 } );
+assert( db.getLastError() , 2);
+assert( t.count() == 1, "hmmm");
+
+t.insert( { _id : 4, x : 99 } );
+assert( !db.getLastError() , 3);
+
+// this should yield an error
+t.update( { _id : 4 } , { _id : 3, x : 99 } );
+assert( db.getLastError() , 4);
+assert( t.findOne( {_id:4} ), 5 );
+
+/* Check for an error message when we index and there are dups */
+db.bar.drop();
+db.bar.insert({_id:3});
+db.bar.insert({_id:3});
+assert( db.bar.count() == 2 , 6) ;
+db.bar.ensureIndex({_id:1});
+assert( db.getLastError() , 7);