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// 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" );
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