83 lines
2.5 KiB
JavaScript
83 lines
2.5 KiB
JavaScript
// Test that tailable cursors work correctly with skip and limit.
|
|
(function() {
|
|
"use strict";
|
|
|
|
// Setup the capped collection.
|
|
var collname = "jstests_tailable_skip_limit"
|
|
var t = db[collname];
|
|
t.drop();
|
|
db.createCollection(collname, {capped: true, size: 1024});
|
|
|
|
t.save({_id: 1});
|
|
t.save({_id: 2});
|
|
|
|
// Non-tailable with skip
|
|
var cursor = t.find().skip(1);
|
|
assert.eq(2, cursor.next()["_id"]);
|
|
assert(!cursor.hasNext());
|
|
t.save({_id: 3});
|
|
assert(!cursor.hasNext());
|
|
|
|
// Non-tailable with limit
|
|
var cursor = t.find().limit(100);
|
|
for (var i = 1; i <= 3; i++) {
|
|
assert.eq(i, cursor.next()["_id"]);
|
|
}
|
|
assert(!cursor.hasNext());
|
|
t.save({_id: 4});
|
|
assert(!cursor.hasNext());
|
|
|
|
// Non-tailable with negative limit
|
|
var cursor = t.find().limit(-100);
|
|
for (var i = 1; i <= 4; i++) {
|
|
assert.eq(i, cursor.next()["_id"]);
|
|
}
|
|
assert(!cursor.hasNext());
|
|
t.save({_id: 5});
|
|
assert(!cursor.hasNext());
|
|
|
|
// Tailable with skip
|
|
cursor = t.find().addOption(2).skip(4);
|
|
assert.eq(5, cursor.next()["_id"]);
|
|
assert(!cursor.hasNext());
|
|
t.save({_id: 6});
|
|
assert(cursor.hasNext());
|
|
assert.eq(6, cursor.next()["_id"]);
|
|
|
|
// Tailable with limit
|
|
var cursor = t.find().addOption(2).limit(100);
|
|
for (var i = 1; i <= 6; i++) {
|
|
assert.eq(i, cursor.next()["_id"]);
|
|
}
|
|
assert(!cursor.hasNext());
|
|
t.save({_id: 7});
|
|
assert(cursor.hasNext());
|
|
assert.eq(7, cursor.next()["_id"]);
|
|
|
|
// Tailable with negative limit
|
|
var cursor = t.find().addOption(2).limit(-100);
|
|
for (var i = 1; i <= 7; i++) {
|
|
assert.eq(i, cursor.next()["_id"]);
|
|
}
|
|
assert(!cursor.hasNext());
|
|
t.save({_id: 8});
|
|
assert(cursor.hasNext());
|
|
assert.eq(8, cursor.next()["_id"]);
|
|
|
|
// Tests that a tailable cursor over an empty capped collection produces a dead cursor, intended
|
|
// to be run on both mongod and mongos. For SERVER-20720.
|
|
t.drop();
|
|
db.createCollection(t.getName(), {capped: true, size: 1024});
|
|
|
|
var cmdRes = db.runCommand({find: t.getName(), tailable: true});
|
|
assert.commandWorked(cmdRes);
|
|
assert.eq(cmdRes.cursor.id, NumberLong(0));
|
|
assert.eq(cmdRes.cursor.ns, t.getFullName());
|
|
assert.eq(cmdRes.cursor.firstBatch.length, 0);
|
|
|
|
// Test that the cursor works in the shell.
|
|
assert.eq(t.find().addOption(2).itcount(), 0);
|
|
assert.writeOK(t.insert({a: 1}));
|
|
assert.eq(t.find().addOption(2).itcount(), 1);
|
|
})();
|