57 lines
2.1 KiB
JavaScript
57 lines
2.1 KiB
JavaScript
/**
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* Test the default behavior of window functions when no documents fall in the window.
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*/
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(function() {
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"use strict";
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const coll = db[jsTestName()];
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coll.drop();
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assert.commandWorked(coll.insert({_id: 0, ticker: "MDB", price: 1000, ts: new Date()}));
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// Over a non-existent field.
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let results =
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coll.aggregate([{
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$setWindowFields: {
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sortBy: {ts: 1},
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output: {
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defaultStdDev:
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{$stdDevPop: "$noField", window: {documents: ["unbounded", "current"]}},
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defaultSum: {$sum: "$noField", window: {documents: ["unbounded", "current"]}},
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defaultAvg: {$avg: "$noField", window: {documents: ["unbounded", "current"]}},
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defaultMin: {$min: "$noField", window: {documents: ["unbounded", "current"]}},
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defaultMax: {$max: "$noField", window: {documents: ["unbounded", "current"]}},
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}
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}
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}])
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.toArray();
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assert.eq(null, results[0].defaultStdDev);
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assert.eq(null, results[0].defaultAvg);
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assert.eq(null, results[0].defaultMin);
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assert.eq(null, results[0].defaultMax);
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// $sum is unique as its default value is 0.
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assert.eq(0, results[0].defaultSum);
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// Over a window with no documents.
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results =
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coll.aggregate([{
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$setWindowFields: {
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sortBy: {ts: 1},
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output: {
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defaultStdDev: {$stdDevPop: "$price", window: {documents: ["unbounded", -1]}},
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defaultSum: {$sum: "$price", window: {documents: ["unbounded", -1]}},
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defaultAvg: {$avg: "$price", window: {documents: ["unbounded", -1]}},
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defaultMin: {$min: "$price", window: {documents: ["unbounded", -1]}},
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defaultMax: {$max: "$price", window: {documents: ["unbounded", -1]}},
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}
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}
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}])
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.toArray();
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assert.eq(null, results[0].defaultStdDev);
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assert.eq(null, results[0].defaultAvg);
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assert.eq(null, results[0].defaultMin);
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assert.eq(null, results[0].defaultMax);
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// $sum is unique as its default value is 0.
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assert.eq(0, results[0].defaultSum);
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})();
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