fix podman container exists and diff for storage containers

Current these commands only check if a container exists in libpod. With
this fix, the commands will also check if they are in containers/storage.

This allows users to look at differences within a buildah or CRI-O container.

Currently buildah diff does not exists, so this helps out in that situation
as well as in CRI-O since the cri does not implement a diff command.

Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>

1 files changed, 22 insertions, 0 deletions

diff --git a/test/system/140-diff.bats b/test/system/140-diff.bats
index 01ec5430e..d0f33e438 100644
--- a/test/system/140-diff.bats
+++ b/test/system/140-diff.bats
@@ -32,4 +32,26 @@ load helpers
     run_podman rm $n
 }
 
+@test "podman diff with buildah container " {
+    rand_file=$(random_string 10)
+    run buildah from --name buildahctr $IMAGE
+    run buildah run buildahctr sh -c "touch /$rand_file;rm /etc/services"
+
+    run_podman diff --format json buildahctr
+
+    # Expected results for each type of diff
+    declare -A expect=(
+        [added]="/$rand_file"
+        [changed]="/etc"
+        [deleted]="/etc/services"
+    )
+
+    for field in ${!expect[@]}; do
+        result=$(jq -r -c ".${field}[]" <<<"$output")
+        is "$result" "${expect[$field]}" "$field"
+    done
+
+    run buildah rm buildahctr
+}
+
 # vim: filetype=sh