Robotics Testing Skill
When to Use This Skill
- Writing unit tests for ROS1/ROS2 nodes
- Setting up integration tests with launch_testing
- Mocking hardware (sensors, actuators) for CI/CD
- Building simulation-based test suites
- Testing perception pipelines with ground truth
- Validating trajectory planners and controllers
- Setting up CI/CD pipelines for robotics packages
- Debugging flaky tests in robotics systems
The Robotics Testing Pyramid
╱╲
╱ ╲ Field Tests
╱ ╲ (Real robot, real environment)
╱──────╲
╱ ╲ Hardware-in-the-Loop (HIL)
╱ ╲ (Real hardware, controlled environment)
╱────────────╲
╱ ╲ Simulation Tests
╱ ╲ (Full sim, realistic physics)
╱──────────────────╲
╱ ╲ Integration Tests
╱ ╲ (Multi-node, message passing)
╱────────────────────────╲
╱ ╲ Unit Tests
╱____________________________╲ (Single function/class, fast, deterministic)
MORE tests at the bottom, FEWER at the top.
Bottom = fast, cheap, deterministic. Top = slow, expensive, realistic.
Unit Testing Patterns
Testing ROS2 Nodes with pytest
# test_perception_node.py
import pytest
import rclpy
from rclpy.node import Node
from sensor_msgs.msg import Image
from my_pkg.perception_node import PerceptionNode
import numpy as np
@pytest.fixture(scope='module')
def ros_context():
"""Initialize ROS2 context once per test module"""
rclpy.init()
yield
rclpy.shutdown()
@pytest.fixture
def perception_node(ros_context):
"""Create a fresh perception node for each test"""
node = PerceptionNode()
yield node
node.destroy_node()
@pytest.fixture
def test_image():
"""Generate a synthetic test image"""
msg = Image()
msg.height = 256
msg.width = 256
msg.encoding = 'rgb8'
msg.step = 256 * 3
msg.data = np.random.randint(0, 255, (256, 256, 3),
dtype=np.uint8).tobytes()
return msg
class TestPerceptionNode:
def test_initialization(self, perception_node):
"""Node should initialize with correct default parameters"""
assert perception_node.get_parameter('confidence_threshold').value == 0.7
assert perception_node.get_parameter(
(截断)
