test: add regression for chatbot

extra-requirements.txt

@@ -59,6 +59,7 @@ pytest-mock:                test
 pytest-cov:                 test
 pytest-repeat:              test
 pytest-asyncio:             test
+pytest-xprocess:            test
 flaky:                      test
 mock:                       test
 requests:                   http, devel, cicd, daemon

tests/system/chatbot/test_chatbot.py

@@ -0,0 +1,47 @@
+import pytest
+import requests
+from xprocess import ProcessStarter
+
+from jina.helloworld.chatbot import hello_world
+from jina.parsers.helloworld import set_hw_chatbot_parser
+
+
+@pytest.fixture
+def chatbot_args(tmpdir):
+    return set_hw_chatbot_parser().parse_args(
+        ['--workdir', str(tmpdir), '--port-expose', '8080']
+    )
+
+
+@pytest.fixture
+def payload():
+    return {'top_k': 1, 'data': ['text:Is my dog safe from virus']}
+
+
+@pytest.fixture
+def post_uri():
+    return 'http://localhost:8080/api/search'
+
+
+@pytest.fixture
+def expected_result():
+    return '''There’s no evidence from the outbreak that eating garlic, sipping water every 15 minutes or taking vitamin C will protect people from the new coronavirus.'''
+
+
+@pytest.fixture(autouse=True)
+def start_server(xprocess, chatbot_args):
+    class Starter(ProcessStarter):
+        pattern = "You should see a demo page opened in your browser"
+        args = ["jina", "hello", "chatbot"]
+        max_read_lines = 10000
+
+    xprocess.ensure("server", Starter)
+    yield
+    xprocess.getinfo("server").terminate()
+
+
+def test_chatbot(payload, post_uri, expected_result):
+    """Regression test for chatbot example."""
+    resp = requests.post(post_uri, json=payload)
+    assert resp.status_code == 200
+    assert expected_result in resp.text