Add test case for exec label (#132)

README.md

@@ -1115,7 +1115,7 @@ services:
     labels:
       - docker-volume-backup.archive-pre=/bin/sh -c 'mysqldump -psecret --all-databases > /tmp/dumps/dump.sql'
     volumes:
-      - app_data:/tmp/dumps
+      - data:/tmp/dumps
   backup:
     image: offen/docker-volume-backup:v2
     environment:

test/commands/docker-compose.yml

@@ -17,6 +17,20 @@ services:
     volumes:
       - app_data:/tmp/volume
 
+  other_database:
+    image: mariadb:10.7
+    deploy:
+      restart_policy:
+        condition: on-failure
+    environment:
+      MARIADB_ROOT_PASSWORD: test
+      MARIADB_DATABASE: backup
+    labels:
+      - docker-volume-backup.archive-pre=touch /tmp/volume/not-relevant.txt
+      - docker-volume-backup.exec-label=not-relevant
+    volumes:
+      - app_data:/tmp/volume
+
   backup:
     image: offen/docker-volume-backup:${TEST_VERSION:-canary}
     deploy:

test/commands/run.sh

@@ -18,6 +18,11 @@ if [ ! -f ./backup/data/dump.sql ]; then
 fi
 pass "Found expected file."
 
+if [ -f ./backup/data/not-relevant.txt ]; then
+  fail "Command ran for container with other label."
+fi
+pass "Command did not run for container with other label."
+
 if [ -f ./backup/data/post.txt ]; then
   fail "File created in post command was present in backup."
 fi