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