12 lines
377 B
JavaScript
12 lines
377 B
JavaScript
/*
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* Test that $concating empty string works correctly. May be extended in the future to include
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* more thorough testing of $concat.
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*/
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const coll = db.concat;
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coll.drop();
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assert.commandWorked(coll.insert({}));
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assert.eq(coll.findOne({}, {_id: false, "a": {$concat: [{$toLower: "$b"}]}}), {a: ""});
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assert.eq(coll.findOne({}, {_id: false, "a": {$concat: []}}), {a: ""});
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