plumb env var through

Author: scotthart

ci/cloudbuild/builds/lib/integration.sh

@@ -84,6 +84,9 @@ function integration::bazel_args() {
     "--test_env=GOOGLE_CLOUD_CPP_BIGTABLE_TEST_SERVICE_ACCOUNT=${GOOGLE_CLOUD_CPP_BIGTABLE_TEST_SERVICE_ACCOUNT}"
     "--test_env=ENABLE_BIGTABLE_ADMIN_INTEGRATION_TESTS=${ENABLE_BIGTABLE_ADMIN_INTEGRATION_TESTS:-no}"
 
+    # Pubsub
+    "--test_env=GOOGLE_CLOUD_CPP_PUBSUB_TEST_IMPERSONATED_SERVICE_ACCOUNT=${GOOGLE_CLOUD_CPP_PUBSUB_TEST_IMPERSONATED_SERVICE_ACCOUNT}"
+
     # Rest
     "--test_env=GOOGLE_CLOUD_CPP_REST_TEST_SIGNING_SERVICE_ACCOUNT=${GOOGLE_CLOUD_CPP_REST_TEST_SIGNING_SERVICE_ACCOUNT}"
 

google/cloud/pubsub/integration_tests/subscriber_integration_test.cc

@@ -356,7 +356,6 @@ TEST_F(SubscriberIntegrationTest, PublishPullAckWithImpersonatedCredentials) {
       google::cloud::internal::GetEnv(
           "GOOGLE_CLOUD_CPP_PUBSUB_TEST_IMPERSONATED_SERVICE_ACCOUNT")
           .value_or("");
-  if (iam_service_account.empty()) GTEST_SKIP();
   auto google_default_credentials = MakeGoogleDefaultCredentials();
   auto options = Options{}.set<UnifiedCredentialsOption>(
       MakeImpersonateServiceAccountCredentials(google_default_credentials,