68 lines
2.9 KiB
JavaScript
68 lines
2.9 KiB
JavaScript
// SERVER-4589: Add $arrayElemAt aggregation expression.
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import "jstests/libs/query/sbe_assert_error_override.js";
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import {assertErrorCode} from "jstests/aggregation/extras/utils.js";
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var coll = db.agg_array_elem_at_expr;
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coll.drop();
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assert.commandWorked(coll.insert({a: [1, 2, 3, 4, 5]}));
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// Normal indexing.
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var pipeline = [{$project: {_id: 0, x: {$arrayElemAt: ['$a', 2]}}}];
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assert.eq(coll.aggregate(pipeline).toArray(), [{x: 3}]);
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// Indexing with a float.
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pipeline = [{$project: {_id: 0, x: {$arrayElemAt: ['$a', 1.0]}}}];
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assert.eq(coll.aggregate(pipeline).toArray(), [{x: 2}]);
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// Indexing with a decimal
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pipeline = [{$project: {_id: 0, x: {$arrayElemAt: ['$a', NumberDecimal('2.0')]}}}];
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assert.eq(coll.aggregate(pipeline).toArray(), [{x: 3}]);
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// Negative indexing.
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pipeline = [{$project: {_id: 0, x: {$arrayElemAt: ['$a', -1]}}}];
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assert.eq(coll.aggregate(pipeline).toArray(), [{x: 5}]);
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pipeline = [{$project: {_id: 0, x: {$arrayElemAt: ['$a', -5]}}}];
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assert.eq(coll.aggregate(pipeline).toArray(), [{x: 1}]);
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// Out of bounds positive.
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pipeline = [{$project: {_id: 0, x: {$arrayElemAt: ['$a', 5]}}}];
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assert.eq(coll.aggregate(pipeline).toArray(), [{}]);
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pipeline = [{$project: {_id: 0, x: {$arrayElemAt: ['$a', Math.pow(2, 31) - 1]}}}];
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assert.eq(coll.aggregate(pipeline).toArray(), [{}]);
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pipeline = [{$project: {_id: 0, x: {$arrayElemAt: ['$a', NumberLong(Math.pow(2, 31) - 1)]}}}];
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assert.eq(coll.aggregate(pipeline).toArray(), [{}]);
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// Out of bounds negative.
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pipeline = [{$project: {_id: 0, x: {$arrayElemAt: ['$a', -6]}}}];
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assert.eq(coll.aggregate(pipeline).toArray(), [{}]);
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pipeline = [{$project: {_id: 0, x: {$arrayElemAt: ['$a', -Math.pow(2, 31)]}}}];
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assert.eq(coll.aggregate(pipeline).toArray(), [{}]);
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pipeline = [{$project: {_id: 0, x: {$arrayElemAt: ['$a', NumberLong(-Math.pow(2, 31))]}}}];
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assert.eq(coll.aggregate(pipeline).toArray(), [{}]);
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// Null inputs.
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pipeline = [{$project: {_id: 0, x: {$arrayElemAt: ['$a', null]}}}];
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assert.eq(coll.aggregate(pipeline).toArray(), [{x: null}]);
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pipeline = [{$project: {_id: 0, x: {$arrayElemAt: [null, 4]}}}];
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assert.eq(coll.aggregate(pipeline).toArray(), [{x: null}]);
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// Error cases.
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// Wrong number of arguments.
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assertErrorCode(coll, [{$project: {x: {$arrayElemAt: [['one', 'arg']]}}}], 16020);
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// First argument is not an array.
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assertErrorCode(coll, [{$project: {x: {$arrayElemAt: ['one', 2]}}}], 28689);
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// Second argument is not numeric.
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assertErrorCode(coll, [{$project: {x: {$arrayElemAt: [[1, 2], '2']}}}], 28690);
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// Second argument is not integral.
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assertErrorCode(coll, [{$project: {x: {$arrayElemAt: [[1, 2], 1.5]}}}], 28691);
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assertErrorCode(coll, [{$project: {x: {$arrayElemAt: [[1, 2], NumberDecimal('1.5')]}}}], 28691);
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assertErrorCode(coll, [{$project: {x: {$arrayElemAt: [[1, 2], Math.pow(2, 32)]}}}], 28691);
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assertErrorCode(coll, [{$project: {x: {$arrayElemAt: [[1, 2], -Math.pow(2, 31) - 1]}}}], 28691);
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