use service container for linux CI

Author: fangchenli

.github/workflows/unit-tests.yml

@@ -140,9 +140,6 @@ jobs:
 
       moto:
         image: motoserver/moto:5.0.27
-        env:
-          AWS_ACCESS_KEY_ID: foobar_key
-          AWS_SECRET_ACCESS_KEY: foobar_secret
         ports:
           - 5000:5000
 

pandas/tests/io/conftest.py

@@ -2,6 +2,12 @@
 
 import pytest
 
+from pandas.compat import (
+    is_ci_environment,
+    is_platform_arm,
+    is_platform_mac,
+    is_platform_windows,
+)
 import pandas.util._test_decorators as td
 
 import pandas.io.common as icom
@@ -53,6 +59,11 @@ def aws_credentials(monkeysession):
 
 @pytest.fixture(scope="session")
 def moto_server(aws_credentials):
+    # use service container for Linux on GitHub Actions
+    if is_ci_environment() and not (
+        is_platform_mac() or is_platform_arm() or is_platform_windows()
+    ):
+        return "http://localhost:5000"
     moto_server = pytest.importorskip("moto.server")
     server = moto_server.ThreadedMotoServer(port=0)
     server.start()