74 lines
2.5 KiB
JavaScript
74 lines
2.5 KiB
JavaScript
// Some correctness checks for fast and normal count modes, including with skip and limit.
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//
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// @tags: [
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// requires_fastcount,
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// # Limit 0 is not supported on views.
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// incompatible_with_views,
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// ]
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let t = db.jstests_count6;
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function checkCountForObject(obj) {
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t.drop();
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t.createIndex({b: 1, a: 1});
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function checkCounts(query, expected) {
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assert.eq(expected, t.count(query), "A1");
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assert.eq(expected, t.find(query).skip(0).limit(0).count(true), "A2");
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// Check proper counts with various skip and limit specs.
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for (var skip = 1; skip <= 2; ++skip) {
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for (let limit = 1; limit <= 2; ++limit) {
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assert.eq(Math.max(expected - skip, 0), t.find(query).skip(skip).count(true), "B1");
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assert.eq(Math.min(expected, limit), t.find(query).limit(limit).count(true), "B2");
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assert.eq(
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Math.min(Math.max(expected - skip, 0), limit),
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t.find(query).skip(skip).limit(limit).count(true),
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"B4",
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);
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// Check limit(x) = limit(-x)
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assert.eq(t.find(query).limit(limit).count(true), t.find(query).limit(-limit).count(true), "C1");
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assert.eq(
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t.find(query).skip(skip).limit(limit).count(true),
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t.find(query).skip(skip).limit(-limit).count(true),
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"C2",
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);
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}
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}
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// Check limit(0) has no effect
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assert.eq(expected, t.find(query).limit(0).count(true), "D1");
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assert.eq(Math.max(expected - skip, 0), t.find(query).skip(skip).limit(0).count(true), "D2");
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assert.eq(expected, t.getDB().runCommand({count: t.getName(), query: query, limit: 0}).n, "D3");
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assert.eq(
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Math.max(expected - skip, 0),
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t.getDB().runCommand({count: t.getName(), query: query, limit: 0, skip: skip}).n,
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"D4",
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);
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}
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for (var i = 0; i < 5; ++i) {
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checkCounts({a: obj.a, b: obj.b}, i);
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checkCounts({b: obj.b, a: obj.a}, i);
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t.insert(obj);
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}
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t.insert({a: true, b: true});
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t.insert({a: true, b: 1});
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t.insert({a: false, b: 1});
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t.insert({a: false, b: true});
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t.insert({a: false, b: false});
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checkCounts({a: obj.a, b: obj.b}, i);
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checkCounts({b: obj.b, a: obj.a}, i);
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// Check with no query
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checkCounts({}, 10);
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}
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// Check fast count mode.
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checkCountForObject({a: true, b: false});
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// Check normal count mode.
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checkCountForObject({a: 1, b: 0});
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