68 lines
1.9 KiB
JavaScript
68 lines
1.9 KiB
JavaScript
// Cannot implicitly shard accessed collections because of following errmsg: A single
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// update/delete on a sharded collection must contain an exact match on _id or contain the shard
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// key.
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// @tags: [assumes_unsharded_collection]
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// $ifNull returns the result of the first expression if not null or undefined, otherwise of the
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// second expression.
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load('jstests/aggregation/extras/utils.js');
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t = db.jstests_aggregation_ifnull;
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t.drop();
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t.save({});
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function assertError(expectedErrorCode, ifNullSpec) {
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assertErrorCode(t, {$project: {a: {$ifNull: ifNullSpec}}}, expectedErrorCode);
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}
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function assertResult(expectedResult, arg0, arg1) {
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var res = t.aggregate({$project: {a: {$ifNull: [arg0, arg1]}}}).toArray()[0];
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assert.eq(expectedResult, res.a);
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}
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// Wrong number of args.
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assertError(16020, []);
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assertError(16020, [1]);
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assertError(16020, [null]);
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assertError(16020, [1, 1, 1]);
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assertError(16020, [1, 1, null]);
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assertError(16020, [1, 1, undefined]);
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// First arg non null.
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assertResult(1, 1, 2);
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assertResult(2, 2, 1);
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assertResult(false, false, 1);
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assertResult('', '', 1);
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assertResult([], [], 1);
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assertResult({}, {}, 1);
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assertResult(1, 1, null);
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assertResult(2, 2, undefined);
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// First arg null.
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assertResult(2, null, 2);
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assertResult(1, null, 1);
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assertResult(null, null, null);
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assertResult(undefined, null, undefined);
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// First arg undefined.
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assertResult(2, undefined, 2);
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assertResult(1, undefined, 1);
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assertResult(null, undefined, null);
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assertResult(undefined, undefined, undefined);
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// Computed expression.
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assertResult(3, {$add: [1, 2]}, 5);
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assertResult(20, '$missingField', {$multiply: [4, 5]});
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// Divide/mod by 0.
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assertError(16608, [{$divide: [1, 0]}, 0]);
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assertError(16610, [{$mod: [1, 0]}, 0]);
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// Nested.
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t.drop();
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t.save({d: 'foo'});
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assertResult('foo', '$a', {$ifNull: ['$b', {$ifNull: ['$c', '$d']}]});
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t.update({}, {$set: {b: 'bar'}});
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assertResult('bar', '$a', {$ifNull: ['$b', {$ifNull: ['$c', '$d']}]});
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