fix: make github actions workflow fail when local E2E tests fail

fixes #152

test-files/scripts/test-local-e2e.sh

@@ -1,9 +1,25 @@
 #!/usr/bin/env sh
 THISDIR=$(cd $(dirname "$0"); pwd) #this script's directory
 
-#####
+##################################################
 # Runs an end-to-end test locally using serverless-offline
-####
+# TLDR; this test curls to some known good endpoints looking for an expected HTTP response code:
+##################################################
+
+die () {
+    echo >&2 "$@"
+    stop_serverless_offline
+    help
+    exit 1
+}
+
+help () {
+  echo 
+  cat << END_DOC
+The script $THISSCRIPT failed. This likely means the e2e tests failed. See output above to confirm.
+END_DOC
+
+}
 
 REPO_ROOT_DIR=$(cd "THISDIR" ; pwd)
 echo "Using REPO_ROOT_DIR $REPO_ROOT_DIR"
@@ -15,34 +31,50 @@ npm install -s
 echo "Running npm install completed."
 
 # run severless-offline in background:
-./node_modules/.bin/serverless offline &
 
-# wait on serverless-offline to start
-sleep 5
+start_serverless_offline() {
+  ./node_modules/.bin/serverless offline &
+
+  # wait on serverless-offline to start
+  sleep 5
+}
+
+start_serverless_offline
+
+stop_serverless_offline() {
+  # shut down serverles offline now
+  echo "Killing serverless offline process..."
+  pkill -f -n "serverless offline"
+  # sleep for a sec just to get clean output due to the background process
+  sleep 1
+  echo "Killing serverless offline process complete."
+}
 
-# CURL to some known good endpoints expecting 200:
-TEST_HTTP_EXEC=$REPO_ROOT_DIR/test-files/scripts/test-http.sh
 ROOT_URL=http://localhost:3000/dev
 
+test_url() {
+  TEST_URL=$1
+  TEST_HTTP_RESP_CODE=$2
+  echo "testing URL '$TEST_URL' with HTTP response code '$TEST_HTTP_RESP_CODE'"
+  $REPO_ROOT_DIR/test-files/scripts/test-http.sh $TEST_URL $TEST_HTTP_RESP_CODE || die "\n*FAILURE* testing URL '$TEST_URL' with HTTP response code '$TEST_HTTP_RESP_CODE'!"  
+}
+
+test_url $ROOT_URL/binary/jpg.jpg
+
 # 200; these all should succeed
-$TEST_HTTP_EXEC $ROOT_URL/binary/png.png
-$TEST_HTTP_EXEC $ROOT_URL/binary/jpg.jpg
-$TEST_HTTP_EXEC $ROOT_URL/binary/glyphicons-halflings-regular.woff2
-$TEST_HTTP_EXEC $ROOT_URL/binary/subdir/png.png
+test_url $ROOT_URL/binary/png.png
+test_url $ROOT_URL/binary/jpg.jpg
+test_url $ROOT_URL/binary/glyphicons-halflings-regular.woff2
+test_url $ROOT_URL/binary/subdir/png.png
 
 # 403 for APIG, but 404 for serverless-offline
-$TEST_HTTP_EXEC "$ROOT_URL/ff404.png" 404
-$TEST_HTTP_EXEC "$ROOT_URL/jpeg404.jpg" 404
-$TEST_HTTP_EXEC "$ROOT_URL/subdir404/ff.png" 404
-$TEST_HTTP_EXEC "$ROOT_URL/subdir/ff404.png" 404
+test_url "$ROOT_URL/ff404.png" 404
+test_url "$ROOT_URL/jpeg404.jpg" 404
+test_url "$ROOT_URL/subdir404/ff.png" 404
+test_url "$ROOT_URL/subdir/ff404.png" 404
 
 # 404
-$TEST_HTTP_EXEC "$ROOT_URL/binary/404-glyphicons-halflings-regular.woff2" 404
-$TEST_HTTP_EXEC "$ROOT_URL/binary/subdir/404-png.png" 404
-
-# shut down serverles offline now
-echo "Killing serverless offline process..."
-pkill -f -n "serverless offline"
-# sleep for a sec just to get clean output due to the background process
-sleep 1
-echo "Killing serverless offline process complete."
+test_url "$ROOT_URL/binary/404-glyphicons-halflings-regular.woff2" 404
+test_url "$ROOT_URL/binary/subdir/404-png.png" 404
+
+stop_serverless_offline