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GeoNearRandomTest = function(name) {
this.name = name;
this.t = db[name];
this.nPts = 0;
// reset state
this.t.drop();
Random.srand(1234);
print("starting test: " + name);
}
GeoNearRandomTest.prototype.mkPt = function mkPt(scale, indexBounds){
if(!indexBounds){
scale = scale || 1; // scale is good for staying away from edges
return [((Random.rand() * 359.8) - 179.9) * scale, ((Random.rand() * 180) - 90) * scale];
}
else{
var range = indexBounds.max - indexBounds.min;
var eps = Math.pow(2, -40);
// Go very close to the borders but not quite there.
return [( Random.rand() * (range - eps) + eps) + indexBounds.min, ( Random.rand() * (range - eps) + eps ) + indexBounds.min];
}
}
GeoNearRandomTest.prototype.insertPts = function(nPts, indexBounds, scale) {
assert.eq(this.nPts, 0, "insertPoints already called");
this.nPts = nPts;
for (var i=0; i<nPts; i++){
this.t.insert({_id: i, loc: this.mkPt(scale, indexBounds)});
}
if(!indexBounds)
this.t.ensureIndex({loc: '2d'});
else
this.t.ensureIndex({loc: '2d'}, indexBounds)
}
GeoNearRandomTest.prototype.assertIsPrefix = function(short, long) {
for (var i=0; i < short.length; i++){
var xS = short[i].obj ? short[i].obj.loc[0] : short[i].loc[0]
var yS = short[i].obj ? short[i].obj.loc[1] : short[i].loc[1]
var dS = short[i].obj ? short[i].dis : 1
var xL = long[i].obj ? long[i].obj.loc[0] : long[i].loc[0]
var yL = long[i].obj ? long[i].obj.loc[1] : long[i].loc[1]
var dL = long[i].obj ? long[i].dis : 1
assert.eq([xS, yS, dS], [xL, yL, dL]);
}
}
GeoNearRandomTest.prototype.testPt = function(pt, opts) {
assert.neq(this.nPts, 0, "insertPoints not yet called");
opts = opts || {};
opts['sphere'] = opts['sphere'] || 0;
opts['nToTest'] = opts['nToTest'] || this.nPts; // be careful, test is O( N^2 )
print("testing point: " + tojson(pt) + " opts: " + tojson(opts));
var cmd = {geoNear:this.t.getName(), near: pt, num: 1, spherical:opts.sphere};
var last = db.runCommand(cmd).results;
for (var i=2; i <= opts.nToTest; i++){
//print(i); // uncomment to watch status
cmd.num = i
var ret = db.runCommand(cmd).results;
try {
this.assertIsPrefix(last, ret);
} catch (e) {
print("*** failed while compairing " + (i-1) + " and " + i);
printjson(cmd);
throw e; // rethrow
}
last = ret;
}
if (!opts.sharded){
last = last.map(function(x){return x.obj});
var query = {loc:{}};
query.loc[ opts.sphere ? '$nearSphere' : '$near' ] = pt;
var near = this.t.find(query).limit(opts.nToTest).toArray();
this.assertIsPrefix(last, near);
assert.eq(last, near);
}
}
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