tests/integration: Automate 'env-file-tests' manual tests

Signed-off-by: Monika Kairaityte <monika@kibit.lt>

tests/integration/env-file-tests/README.md

@@ -1,37 +0,0 @@
-running the following commands should always give podman-rocks-123
-
-```
-podman-compose -f project/container-compose.yaml --env-file env-files/project-1.env up
-```
-
-```
-podman-compose -f $(pwd)/project/container-compose.yaml --env-file $(pwd)/env-files/project-1.env up
-```
-
-```
-podman-compose -f $(pwd)/project/container-compose.env-file-flat.yaml up
-```
-
-```
-podman-compose -f $(pwd)/project/container-compose.env-file-obj.yaml up
-```
-
-```
-podman-compose -f $(pwd)/project/container-compose.env-file-obj-optional.yaml up
-```
-
-based on environment variable precedent this command should give podman-rocks-321
-
-```
-ZZVAR1=podman-rocks-321 podman-compose -f $(pwd)/project/container-compose.yaml --env-file $(pwd)/env-files/project-1.env up
-```
-
-_The below test should print three environment variables_
-
-```
-podman-compose -f $(pwd)/project/container-compose.load-.env-in-project.yaml run --rm app
-
-ZZVAR1=This value is overwritten by env-file-tests/.env
-ZZVAR2=This value is loaded from .env in project/ directory
-ZZVAR3=This value is loaded from env-file-tests/.env
-```

tests/integration/env-file-tests/project/container-compose.env-file-obj-optional-exists.yaml

@@ -7,5 +7,5 @@ services:
       - /tmp
     env_file:
       - path: ../env-files/project-1.env
-      - path: ../env-files/project-2.env
+      - path: ../env-files/project-2.env # this file exists
         required: false

tests/integration/env-file-tests/project/container-compose.env-file-obj-optional-missing.yaml

@@ -0,0 +1,11 @@
+services:
+  app:
+    image: busybox
+    command: ["/bin/busybox", "sh", "-c", "env | grep ZZ"]
+    tmpfs:
+      - /run
+      - /tmp
+    env_file:
+      - path: ../env-files/project-1.env
+      - path: ../env-files/project-3.env # this file is missing
+        required: false