// unique index constraint test for updates 
// case where object doesn't grow tested here

t = db.indexa;
t.drop();

t.ensureIndex( { x:1 }, true );

t.insert( { 'x':'A' } );
t.insert( { 'x':'B' } );
t.insert( { 'x':'A' } );

assert.eq( 2 , t.count() , "indexa 1" );

t.update( {x:'B'}, { x:'A' } );

a = t.find().toArray();
u = Array.unique( a.map( function(z){ return z.x } ) );
assert.eq( 2 , t.count() , "indexa 2" );

assert( a.length == u.length , "unique index update is broken" );