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// Test various cursor behaviors
var t = db.geo_s2getmmm
t.drop();
t.ensureIndex({geo: "2dsphere"});
Random.setRandomSeed();
var random = Random.rand;
/*
* To test that getmore is working within 2dsphere index.
* We insert a bunch of points and get a cursor. We then
* fetch some of the points and verify that the number of
* query and getmore operations are correct. Finally, we
* fetch the rest of the points and again verify that the
* number of query and getmore operations are correct.
*/
function sign() { return random() > 0.5 ? 1 : -1; }
function insertRandomPoints(num, minDist, maxDist){
for(var i = 0; i < num; i++){
var lat = sign() * (minDist + random() * (maxDist - minDist));
var lng = sign() * (minDist + random() * (maxDist - minDist));
var point = { geo: { type: "Point", coordinates: [lng, lat] } };
assert.writeOK(t.insert(point));
}
}
var totalPointCount = 200;
var initialAdvance = 10;
var batchSize = 4;
// Insert points between 0.01 and 1.0 away.
insertRandomPoints(totalPointCount, 0.01, 1.0);
var cursor = t.find({geo: {$geoNear : {$geometry: {type: "Point", coordinates: [0.0, 0.0]}}}})
.batchSize(batchSize);
assert.eq(cursor.count(), totalPointCount);
// Disable profiling in order to drop the system.profile collection.
// Then enable profiling for all operations. This is acceptable because
// our test is blacklisted from the parallel suite.
db.setProfilingLevel(0);
db.system.profile.drop();
db.setProfilingLevel(2);
for (var j = 0; j < initialAdvance; j++) {
assert(cursor.hasNext());
cursor.next();
}
// We looked at (totalPointCount - initialAdvance) points, there should still be more.
assert(cursor.hasNext())
// Cursor was advanced 10 times, batchSize=4 => 1 query + 2 getmore.
assert.eq(1, db.system.profile.count({op: "query", ns: t.getFullName()}));
assert.eq(2, db.system.profile.count({op: "getmore", ns: t.getFullName()}));
for (var k = initialAdvance; k < totalPointCount; k++) {
assert(cursor.hasNext())
var tmpPoint = cursor.next();
}
// Cursor was advanced 200 times, batchSize=4 => 1 query + 49 getmore.
assert.eq(1, db.system.profile.count({op: "query", ns: t.getFullName()}));
assert.eq(49, db.system.profile.count({op: "getmore", ns: t.getFullName()}));
// Disable profiling again - no longer needed for remainder of test
db.setProfilingLevel(0);
db.system.profile.drop();
// Shouldn't be any more points to look at now.
assert(!cursor.hasNext())
var someLimit = 23;
// Make sure limit does something.
cursor = t.find({geo: {$geoNear : {$geometry: {type: "Point", coordinates: [0.0, 0.0]}}}}).limit(someLimit)
// Count doesn't work here -- ignores limit/skip, so we use itcount.
assert.eq(cursor.itcount(), someLimit)
// Make sure skip works by skipping some stuff ourselves.
var someSkip = 3;
cursor = t.find({geo: {$geoNear : {$geometry: {type: "Point", coordinates: [0.0, 0.0]}}}}).limit(someLimit + someSkip)
for (var i = 0; i < someSkip; ++i) { cursor.next(); }
var cursor2 = t.find({geo: {$geoNear : {$geometry: {type: "Point", coordinates: [0.0, 0.0]}}}}).skip(someSkip).limit(someLimit)
while (cursor.hasNext()) {
assert(cursor2.hasNext());
assert.eq(cursor.next(), cursor2.next());
}
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