btrfs-progs: tests: Test fs on image files is correctly recognised

This ensures that 'btrfs filesystem show' can correctly identify a
filesystem on a newly created local file.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

tests/misc-tests/037-fi-show-on-new-file/test.sh

@@ -0,0 +1,15 @@
+#!/bin/bash
+# test for 'filesystem show' on fresh local file
+
+source "$TEST_TOP/common"
+
+check_prereq mkfs.btrfs
+check_prereq btrfs
+
+IMAGE=$(mktemp -u btrfs-XXXXXX.img)
+
+run_check truncate -s3g "$IMAGE"
+run_check $SUDO_HELPER "$TOP/mkfs.btrfs" -f "$IMAGE"
+run_check $SUDO_HELPER "$TOP/btrfs" filesystem show "$IMAGE"
+
+rm -f "$IMAGE"