mirror of https://github.com/mongodb/mongo
37 lines
1.3 KiB
JavaScript
37 lines
1.3 KiB
JavaScript
// SERVER-18222: Add $isArray aggregation expression.
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let coll = db.is_array_expr;
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coll.drop();
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// Non-array types.
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assert.commandWorked(coll.insert({_id: 0, x: 0}));
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assert.commandWorked(coll.insert({_id: 1, x: "0"}));
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assert.commandWorked(coll.insert({_id: 2, x: new ObjectId()}));
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assert.commandWorked(coll.insert({_id: 3, x: new NumberLong(0)}));
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assert.commandWorked(coll.insert({_id: 4, x: {y: []}}));
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assert.commandWorked(coll.insert({_id: 5, x: null}));
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assert.commandWorked(coll.insert({_id: 6, x: NaN}));
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assert.commandWorked(coll.insert({_id: 7, x: undefined}));
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// Array types.
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assert.commandWorked(coll.insert({_id: 8, x: []}));
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assert.commandWorked(coll.insert({_id: 9, x: [0]}));
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assert.commandWorked(coll.insert({_id: 10, x: ["0"]}));
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// Project field is_array to represent whether the field x was an array.
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let results = coll.aggregate([{$sort: {_id: 1}}, {$project: {isArray: {$isArray: "$x"}}}]).toArray();
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let expectedResults = [
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{_id: 0, isArray: false},
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{_id: 1, isArray: false},
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{_id: 2, isArray: false},
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{_id: 3, isArray: false},
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{_id: 4, isArray: false},
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{_id: 5, isArray: false},
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{_id: 6, isArray: false},
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{_id: 7, isArray: false},
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{_id: 8, isArray: true},
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{_id: 9, isArray: true},
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{_id: 10, isArray: true},
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];
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assert.eq(results, expectedResults);
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