Add a simplistic integration and regression test

This test basically consists of the Canterbury Corpus which is turned
into a SquashFS image using every supported compressor, with every
supported block size, with and without tail end packing.

The results MUST have an exact, given sha512sum. If that changes, it
means either a regression in the output format, something broke or
non-deterministic packing behaviour.

Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>

4 files changed, 158 insertions, 0 deletions

diff --git a/tests/Makemodule.am b/tests/Makemodule.am
index 51363e3..492744d 100644
--- a/tests/Makemodule.am
+++ b/tests/Makemodule.am
@@ -93,6 +93,7 @@ check_PROGRAMS += test_get_path test_fstree_sort test_fstree_from_file
 check_PROGRAMS += test_fstree_init test_tar_ustar test_tar_pax test_tar_gnu
 check_PROGRAMS += test_tar_sparse_gnu test_tar_sparse_gnu1 test_tar_sparse_gnu2
 check_PROGRAMS += test_tar_xattr_bsd test_tar_xattr_schily
+check_SCRIPTS += tests/cantrbry.sh
 
 noinst_PROGRAMS += fstree_fuzz tar_fuzz
 
@@ -102,7 +103,10 @@ TESTS += test_add_by_path test_get_path test_fstree_sort test_fstree_from_file
 TESTS += test_fstree_init test_tar_ustar test_tar_pax
 TESTS += test_tar_gnu test_tar_sparse_gnu test_tar_sparse_gnu1
 TESTS += test_tar_sparse_gnu2 test_tar_xattr_bsd test_tar_xattr_schily
+TESTS += tests/cantrbry.sh
 endif
 
 EXTRA_DIST += $(top_srcdir)/tests/tar $(top_srcdir)/tests/words.txt
 EXTRA_DIST += $(top_srcdir)/tests/fstree1.txt
+EXTRA_DIST += $(top_srcdir)/tests/corpus/cantrbry.tar.xz
+EXTRA_DIST += $(top_srcdir)/tests/corpus/cantrbry.sha512
diff --git a/tests/cantrbry.sh.in b/tests/cantrbry.sh.in
new file mode 100755
index 0000000..c8ba917
--- /dev/null
+++ b/tests/cantrbry.sh.in
@@ -0,0 +1,46 @@
+#!/bin/sh
+
+set -e
+
+CORPUS="@abs_top_srcdir@/tests/corpus/cantrbry.tar.xz"
+SHA512FILE="@abs_top_srcdir@/tests/corpus/cantrbry.sha512"
+TAR2SQFS="@abs_top_builddir@/tar2sqfs"
+
+COMPRESSORS=$(@abs_top_builddir@/tar2sqfs --help |\
+	      sed -ne '/^Available compressors:$/{:a' -e 'n;p;ba' -e '}' |\
+	      sed -n '/\t/p')
+
+for size in 4096 8192 16384 32768 65536 131072 262144 524288 1048576; do
+	for cmp in $COMPRESSORS; do
+		for threads in 1 2 3 4; do
+			name="cantrbry_${cmp}_${size}_${threads}.sqfs"
+
+			xzcat "$CORPUS" | \
+				"$TAR2SQFS" -q -c "$cmp" -b "$size" \
+					    -j "$threads" "$name"
+
+			name="cantrbry_${cmp}_${size}_${threads}_T.sqfs"
+
+			xzcat "$CORPUS" | \
+				"$TAR2SQFS" -qT -c "$cmp" -b "$size" \
+					    -j "$threads" "$name"
+		done
+
+		# check that the ones with > 1 thread are identical,
+		# then remove them.
+		for threads in 2 3 4; do
+			name="cantrbry_${cmp}_${size}_${threads}.sqfs"
+			ref="cantrbry_${cmp}_${size}_1.sqfs"
+			diff "$name" "$ref"
+			rm "$name"
+
+			name="cantrbry_${cmp}_${size}_${threads}_T.sqfs"
+			ref="cantrbry_${cmp}_${size}_1_T.sqfs"
+			diff "$name" "$ref"
+			rm "$name"
+		done
+	done
+done
+
+sha512sum --ignore-missing -c "$SHA512FILE"
+rm cantrbry_*.sqfs
diff --git a/tests/corpus/cantrbry.sha512 b/tests/corpus/cantrbry.sha512
new file mode 100644
index 0000000..be59436
--- /dev/null
+++ b/tests/corpus/cantrbry.sha512
@@ -0,0 +1,108 @@
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diff --git a/tests/corpus/cantrbry.tar.xz b/tests/corpus/cantrbry.tar.xz
new file mode 100644
index 0000000..32be882
--- /dev/null
+++ b/tests/corpus/cantrbry.tar.xz