10 lines
258 B
JavaScript
10 lines
258 B
JavaScript
// make sure $concat doesn't optimize constants to the end
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c = db.c;
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c.drop();
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c.save( { x:'3' } );
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project = { $project:{ a:{ $concat:[ '1', { $concat:[ 'foo', '$x', 'bar' ] }, '2' ] } } };
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assert.eq( '1foo3bar2', c.aggregate( project ).result[ 0 ].a );
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