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// @tags: [requires_getmore]
//
// Tests the error handling of spherical queries
// along with multi-location documents.
// This is necessary since the error handling must manage
// multiple documents, and so requires simultaneous testing.
//
load("jstests/libs/geo_math.js");
function computexscandist(y, maxDistDegrees) {
return maxDistDegrees /
Math.min(Math.cos(deg2rad(Math.min(89.0, y + maxDistDegrees))),
Math.cos(deg2rad(Math.max(-89.0, y - maxDistDegrees))));
}
function pointIsOK(startPoint, radius) {
yscandist = rad2deg(radius) + 0.01;
xscandist = computexscandist(startPoint[1], yscandist);
return (startPoint[0] + xscandist < 180) && (startPoint[0] - xscandist > -180) &&
(startPoint[1] + yscandist < 90) && (startPoint[1] - yscandist > -90);
}
var numTests = 30;
for (var test = 0; test < numTests; test++) {
Random.srand(1337 + test);
var radius = 5000 * Random.rand(); // km
radius = radius / 6378.1; // radians; earth radius from geoconstants.h
var numDocs = Math.floor(400 * Random.rand());
// TODO: Wrapping uses the error value to figure out what would overlap...
var bits = Math.floor(5 + Random.rand() * 28);
var maxPointsPerDoc = 50;
var t = db.sphere;
var randomPoint = function() {
return [Random.rand() * 360 - 180, Random.rand() * 180 - 90];
};
// Get a start point that doesn't require wrapping
// TODO: Are we a bit too aggressive with wrapping issues?
var startPoint;
var ex = null;
do {
t.drop();
startPoint = randomPoint();
t.ensureIndex({loc: "2d"}, {bits: bits});
} while (!pointIsOK(startPoint, radius));
var pointsIn = 0;
var pointsOut = 0;
var docsIn = 0;
var docsOut = 0;
var totalPoints = 0;
var bulk = t.initializeUnorderedBulkOp();
for (var i = 0; i < numDocs; i++) {
var numPoints = Math.floor(Random.rand() * maxPointsPerDoc + 1);
var docIn = false;
var multiPoint = [];
totalPoints += numPoints;
for (var p = 0; p < numPoints; p++) {
var point = randomPoint();
multiPoint.push(point);
if (Geo.sphereDistance(startPoint, point) <= radius) {
pointsIn++;
docIn = true;
} else {
pointsOut++;
}
}
bulk.insert({loc: multiPoint});
if (docIn)
docsIn++;
else
docsOut++;
}
printjson({
test: test,
radius: radius,
bits: bits,
numDocs: numDocs,
pointsIn: pointsIn,
docsIn: docsIn,
pointsOut: pointsOut,
docsOut: docsOut
});
assert.commandWorked(bulk.execute());
assert.eq(docsIn + docsOut, numDocs);
assert.eq(pointsIn + pointsOut, totalPoints);
// $centerSphere
assert.eq(docsIn, t.find({loc: {$within: {$centerSphere: [startPoint, radius]}}}).count());
// $nearSphere
var cursor = t.find({loc: {$nearSphere: startPoint, $maxDistance: radius}});
var results = cursor.limit(2 * pointsIn).toArray();
assert.eq(docsIn, results.length);
var distance = 0;
for (var i = 0; i < results.length; i++) {
var minNewDistance = radius + 1;
for (var j = 0; j < results[i].loc.length; j++) {
var newDistance = Geo.sphereDistance(startPoint, results[i].loc[j]);
if (newDistance < minNewDistance && newDistance >= distance) {
minNewDistance = newDistance;
}
}
// print( "Dist from : " + results[i].loc[j] + " to " + startPoint + " is "
// + minNewDistance + " vs " + radius )
assert.lte(minNewDistance, radius);
assert.gte(minNewDistance, distance);
distance = minNewDistance;
}
// Test $geoNear.
results = t.aggregate({
$geoNear: {
near: startPoint,
distanceField: "dis",
maxDistance: radius,
spherical: true,
}
}).toArray();
assert.eq(docsIn, results.length, tojson(results));
var distance = 0;
for (var i = 0; i < results.length; i++) {
var retDistance = results[i].dis;
var distInObj = false;
for (var j = 0; j < results[i].loc.length && distInObj == false; j++) {
var newDistance = Geo.sphereDistance(startPoint, results[i].loc[j]);
distInObj =
(newDistance >= retDistance - 0.0001 && newDistance <= retDistance + 0.0001);
}
assert(distInObj);
assert.lte(retDistance, radius);
assert.gte(retDistance, distance);
distance = retDistance;
}
}
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