Add CI task to run tests

It needs to be a separate group because moto server needs to be installed and
running

.circleci/config.yml

@@ -316,6 +316,47 @@ jobs:
       - store_test_results:
           path: /tmp/logs
 
+  mock_aws_test:
+    <<: *env
+    docker:
+      - image: cimg/python:3.10.2
+    steps:
+      - attach_workspace:
+          at: /home/circleci
+            #- run:
+            #    <<: *install_gruntwork_utils
+      - run:
+          name: install mock aws server
+          command: |
+            pip install moto[server]
+      - run:
+          name: install aws cli
+          command: |
+            curl "https://awscli.amazonaws.com/awscli-exe-linux-x86_64.zip" -o "awscliv2.zip"
+            unzip awscliv2.zip
+            sudo ./aws/install
+      - run:
+          name: run mock aws server
+          command: |
+            moto_server | tee /tmp/logs/moto_server_output.log
+          background: true
+      - run:
+          name: wait for mock aws server
+          command: |
+            while ! AWS_REGION=us-west-2 AWS_ACCESS_KEY_ID=dummy AWS_SECRET_ACCESS_KEY=dummy aws --endpoint http://localhost:5000 sts get-caller-identity; do
+              echo "Waiting for local mock AWS server"
+              sleep 1
+            done
+      - run:
+          command: |
+            mkdir -p /tmp/logs
+            run-go-tests --packages "-tags=mockaws ./test/" | tee /tmp/logs/test_output.log
+
+      # Store test result and log artifacts for browsing purposes
+      - store_artifacts:
+          path: /tmp/logs
+      - store_test_results:
+          path: /tmp/logs
 
   deploy:
     <<: *defaults
@@ -379,6 +420,15 @@ workflows:
             tags:
               only: /^v.*/
 
+      - mock_aws_test:
+          context:
+            - Gruntwork Admin
+          requires:
+            - setup
+          filters:
+            tags:
+              only: /^v.*/
+
       - deploy:
           context:
             - Gruntwork Admin

test/terraform_aws_endpoint_example_test.go

@@ -1,3 +1,10 @@
+//go:build mockaws
+// +build mockaws
+
+// NOTE: We use build tags to differentiate mockaws testing because this uses
+// a local mock AWS service
+// (https://docs.getmoto.org/en/latest/docs/server_mode.html)
+
 package test
 
 import (