Prediction: fixed typo and updated unit tests.

modules/prediction/common/road_graph_test.cc

@@ -127,11 +127,11 @@ TEST_F(RoadGraphTest, MultipleLaneSequence) {
   EXPECT_EQ(3, lane_graph.lane_sequence(0).lane_segment_size());
   EXPECT_EQ(3, lane_graph.lane_sequence(1).lane_segment_size());
   EXPECT_EQ("l20", lane_graph.lane_sequence(0).lane_segment(0).lane_id());
-  EXPECT_EQ("l31", lane_graph.lane_sequence(0).lane_segment(1).lane_id());
-  EXPECT_EQ("l29", lane_graph.lane_sequence(0).lane_segment(2).lane_id());
+  EXPECT_EQ("l98", lane_graph.lane_sequence(0).lane_segment(1).lane_id());
+  EXPECT_EQ("l95", lane_graph.lane_sequence(0).lane_segment(2).lane_id());
   EXPECT_EQ("l20", lane_graph.lane_sequence(1).lane_segment(0).lane_id());
-  EXPECT_EQ("l98", lane_graph.lane_sequence(1).lane_segment(1).lane_id());
-  EXPECT_EQ("l95", lane_graph.lane_sequence(1).lane_segment(2).lane_id());
+  EXPECT_EQ("l31", lane_graph.lane_sequence(1).lane_segment(1).lane_id());
+  EXPECT_EQ("l29", lane_graph.lane_sequence(1).lane_segment(2).lane_id());
 }
 
 }  // namespace prediction

modules/prediction/container/obstacles/obstacle.cc

@@ -467,7 +467,7 @@ void Obstacle::SetPolygonPoints(const PerceptionObstacle& perception_obstacle,
     if (perception_obstacle.polygon_point(i).has_y()) {
       y = perception_obstacle.polygon_point(i).y();
     }
-    if (perception_obstacle.polygon_point(i).has_x()) {
+    if (perception_obstacle.polygon_point(i).has_z()) {
       z = perception_obstacle.polygon_point(i).z();
     }