text: // Test geo index selection criterion, with and without explicit hints. SERVER-4531
  
  t = db.jstests_geog;
  t.drop();
  
  t.save({a:{x:0,y:0},z:1});
  
  query = {a:[0,0],z:1};
  
  function assertCount( count, hint ) {
      if ( hint ) {
          assert.eq( count, t.find(query).hint(hint).itcount() );
      }
      else {
          assert.eq( count, t.find(query).itcount() );
          assert.eq( count, t.count(query) );
      }
  }
  
  function assertNotTryingGeoIndex() {
      plans = t.find(query).explain(true).allPlans;
      for( i in plans ) {
          assert( !plans[i].cursor.match( /Geo/ ) );
      }
  }
  
  function assertNonGeoResults() {
      assertCount( 0 );
      assertNotTryingGeoIndex();
  }
  
  function assertNonGeoResultsWithHint() {
      assertCount( 0, {a:1} );
      assertCount( 0, {$natural:1} );
  }
  
  function assertGeoResults() {
      assertCount( 1 );
  }
  
  function assertGeoResultsWithHint() {
      assertCount( 1, {a:'2d',z:1} );
  }
  
  assertNonGeoResults();
  
  t.ensureIndex({a:'2d',z:1});
  // If geo is the only index option, pick it.
  assertGeoResults();
  assertGeoResultsWithHint();
  
  t.ensureIndex({a:1});
  // If there is a non geo index, don't use the geo index.
  assertNonGeoResults();
  assertNonGeoResultsWithHint();
  assertGeoResultsWithHint();
  
  t.dropIndex({a:1});
  assertGeoResults();
  assertGeoResultsWithHint();
  