adding basic run test - we cant actually test conversion because connecting to daemon on circle unlikely

Author: vsoch

.circleci/config.yml

@@ -20,6 +20,7 @@ defaults: &defaults
   working_directory: /tmp/src
   environment:
     - CONTAINER_NAME: singularityware/docker2singularity
+    - TESTING_CONTAINER: vanessa/salad
 
 # Installation
 
@@ -74,6 +75,18 @@ dockerbuild: &dockerbuild
       DOCKER_TAG="v$(cat VERSION)"
       docker build -t ${CONTAINER_NAME}:${DOCKER_TAG} .
 
+test: &test
+    name: Test using docker2singularity
+    command: |
+      echo "Testing docker2singularity with ${TESTING_CONTAINER}"
+      docker pull "${TESTING_CONTAINER}"
+      echo "docker pull ${TESTING_CONTAINER}"
+      DOCKER_TAG="v$(cat VERSION)"
+      echo "1. Testing run without arguments..."
+      echo "docker run ${CONTAINER_NAME}:${DOCKER_TAG}"
+      docker run "${CONTAINER_NAME}:${DOCKER_TAG}"
+      echo "Return value $?"
+
 ################################################################################
 # Jobs
 ################################################################################
@@ -96,6 +109,7 @@ jobs:
       - run: *install
       - run: *dockerload
       - run: *dockerbuild
+      - run: *test
       - run: *dockersave
       - persist_to_workspace:
             root: /tmp
@@ -130,7 +144,7 @@ jobs:
 
 workflows:
   version: 2
-  build_deploy:
+  build_test_deploy:
     jobs:
       - build:
           filters: