[PATCH] erofs-utils: tests: add test for file-backed mount

[Hongzhen Luo]

Test for the file-backed mount feature.

Signed-off-by: Hongzhen Luo <hongzhen at linux.alibaba.com>
---
 tests/Makefile.am   |  3 +++
 tests/erofs/026     | 54 +++++++++++++++++++++++++++++++++++++++++++++
 tests/erofs/026.out |  2 ++
 3 files changed, 59 insertions(+)
 create mode 100755 tests/erofs/026
 create mode 100644 tests/erofs/026.out

diff --git a/tests/Makefile.am b/tests/Makefile.am
index 93016e5..70044a3 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -110,6 +110,9 @@ TESTS += erofs/024
 # 025 - regression test for corrupted directories with hardlinks
 TESTS += erofs/025
 
+# 026 - test for file-backed mount
+TESTS += erofs/026
+
 EXTRA_DIST = common/rc erofs
 
 clean-local: clean-local-check
diff --git a/tests/erofs/026 b/tests/erofs/026
new file mode 100755
index 0000000..2228f4b
--- /dev/null
+++ b/tests/erofs/026
@@ -0,0 +1,54 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Test for file-backed moount
+#
+seq=`basename $0`
+seqres=$RESULT_DIR/$(echo $0 | awk '{print $((NF-1))"/"$NF}' FS="/")
+
+# get standard environment, filters and checks
+. "${srcdir}/common/rc"
+
+cleanup()
+{
+	cd /
+	rm -rf $tmp.*
+}
+
+_require_root
+_require_erofs
+_require_fssum
+
+# remove previous $seqres.full before test
+rm -f $seqres.full
+
+# real QA test starts here
+echo "QA output created by $seq"
+
+if [ -z $SCRATCH_DEV ]; then
+	SCRATCH_DEV=$tmp/erofs_$seq.img
+	rm -f SCRATCH_DEV
+fi
+
+input_dir="../lib/"
+FSSUM_OPTS="-MAC"
+sum_std=`$FSSUM_PROG $FSSUM_OPTS "$input_dir"`
+
+# test uncompressed files
+_scratch_mkfs "$input_dir" >> $seqres.full 2>&1 || _fail "failed to mkfs (uncompressed)"
+_do_mount "-t $FSTYP $SCRATCH_DEV $SCRATCH_MNT" 2>>$seqres.full
+sum_uncompressed=`$FSSUM_PROG $FSSUM_OPTS $SCRATCH_MNT`
+[ "x$sum_std" = "x$sum_uncompressed" ] || _fail "-->test uncompressed files FAILED"
+_scratch_unmount
+
+_require_erofs_compression "-zdeflate,9"
+MKFS_OPTIONS=" -zdeflate,9"
+_scratch_mkfs "$input_dir" >> $seqres.full 2>&1 || _fail "failed to mkfs (compressed)"
+_do_mount "-t $FSTYP $SCRATCH_DEV $SCRATCH_MNT" 2>>$seqres.full
+sum_compressed=`$FSSUM_PROG $FSSUM_OPTS $SCRATCH_MNT`
+[ "x$sum_std" = "x$sum_compressed" ] || _fail "-->test compressed files FAILED"
+_scratch_unmount
+
+echo Silence is golden
+status=0
+exit 0
diff --git a/tests/erofs/026.out b/tests/erofs/026.out
new file mode 100644
index 0000000..e45c6a3
--- /dev/null
+++ b/tests/erofs/026.out
@@ -0,0 +1,2 @@
+QA output created by 026
+Silence is golden
-- 
2.43.5