mirror of https://github.com/mongodb/mongo
30 lines
946 B
JavaScript
30 lines
946 B
JavaScript
// Tests for $array expression.
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let coll = db.array_expr;
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coll.drop();
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function assertArray(expArray, ...inputs) {
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assert(coll.drop());
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if (inputs.length == 0) {
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assert.commandWorked(coll.insert({}));
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} else if (inputs.length == 1) {
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assert.commandWorked(coll.insert({a: inputs[0]}));
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} else {
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assert.commandWorked(coll.insert({a: inputs[0], b: inputs[1]}));
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}
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const result = coll.aggregate([{$project: {out: ["$a", "$b"]}}]).toArray()[0].out;
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assert.eq(result, expArray);
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}
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assertArray([1, 2], 1, 2);
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assertArray([null, null], null, null);
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assertArray(["TestInput", null], "TestInput", null);
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assertArray([{a: 1, b: 2}, [1, 2]], {a: 1, b: 2}, [1, 2]);
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assertArray(["TestInput", null], "TestInput");
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assertArray([null, null]);
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// no arg
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assert(coll.drop());
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assert.commandWorked(coll.insert({}));
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let result = coll.aggregate([{$project: {out: []}}]).toArray()[0].out;
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assert.eq(result, []);
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