1 files changed, 47 insertions, 4 deletions

diff --git a/system_tests/noxfile.py b/system_tests/noxfile.py
index 540727e..459b71c 100644
--- a/system_tests/noxfile.py
+++ b/system_tests/noxfile.py
@@ -171,7 +171,7 @@ def configure_cloud_sdk(session, application_default_credentials, project=False)
 TEST_DEPENDENCIES_ASYNC = ["aiohttp", "pytest-asyncio", "nest-asyncio"]
 TEST_DEPENDENCIES_SYNC = ["pytest", "requests", "mock"]
 PYTHON_VERSIONS_ASYNC = ["3.7"]
-PYTHON_VERSIONS_SYNC = ["3.7"]
+PYTHON_VERSIONS_SYNC = ["2.7", "3.7"]
 
 
 def default(session, *test_paths):
@@ -287,6 +287,50 @@ def compute_engine(session):
     )
 
 
+@nox.session(python=["2.7"])
+def app_engine(session):
+    if SKIP_GAE_TEST_ENV in os.environ:
+        session.log("Skipping App Engine tests.")
+        return
+
+    session.install(LIBRARY_DIR)
+    # Unlike the default tests above, the App Engine system test require a
+    # 'real' gcloud sdk installation that is configured to deploy to an
+    # app engine project.
+    # Grab the project ID from the cloud sdk.
+    project_id = (
+        subprocess.check_output(
+            ["gcloud", "config", "list", "project", "--format", "value(core.project)"]
+        )
+        .decode("utf-8")
+        .strip()
+    )
+
+    if not project_id:
+        session.error(
+            "The Cloud SDK must be installed and configured to deploy to App " "Engine."
+        )
+
+    application_url = GAE_APP_URL_TMPL.format(GAE_TEST_APP_SERVICE, project_id)
+
+    # Vendor in the test application's dependencies
+    session.chdir(os.path.join(HERE, "system_tests_sync/app_engine_test_app"))
+    session.install(*TEST_DEPENDENCIES_SYNC)
+    session.run(
+        "pip", "install", "--target", "lib", "-r", "requirements.txt", silent=True
+    )
+
+    # Deploy the application.
+    session.run("gcloud", "app", "deploy", "-q", "app.yaml")
+
+    # Run the tests
+    session.env["TEST_APP_URL"] = application_url
+    session.chdir(HERE)
+    default(
+        session, "system_tests_sync/test_app_engine.py",
+    )
+
+
 @nox.session(python=PYTHON_VERSIONS_SYNC)
 def grpc(session):
     session.install(LIBRARY_DIR)
@@ -339,9 +383,8 @@ def mtls_http(session):
 def external_accounts(session):
     session.install(
         *TEST_DEPENDENCIES_SYNC,
-        "google-auth",
+        LIBRARY_DIR,
         "google-api-python-client",
-        "enum34",
     )
     default(
         session,
@@ -354,7 +397,7 @@ def external_accounts(session):
 def downscoping(session):
     session.install(
         *TEST_DEPENDENCIES_SYNC,
-        "google-auth",
+        LIBRARY_DIR,
         "google-cloud-storage",
     )
     default(