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t = db.explain1;
t.drop();
for (var i = 0; i < 100; i++) {
t.save({x: i});
}
q = {
x: {$gt: 50}
};
assert.eq(49, t.find(q).count(), "A");
assert.eq(49, t.find(q).itcount(), "B");
assert.eq(20, t.find(q).limit(20).itcount(), "C");
t.ensureIndex({x: 1});
assert.eq(49, t.find(q).count(), "D");
assert.eq(49, t.find(q).itcount(), "E");
assert.eq(20, t.find(q).limit(20).itcount(), "F");
assert.eq(49, t.find(q).explain("executionStats").executionStats.nReturned, "G");
assert.eq(20, t.find(q).limit(20).explain("executionStats").executionStats.nReturned, "H");
assert.eq(20, t.find(q).limit(-20).explain("executionStats").executionStats.nReturned, "I");
assert.eq(49, t.find(q).batchSize(20).explain("executionStats").executionStats.nReturned, "J");
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