[tests] add a test for decompression

TESTS_ENVIRONMENT.in

@@ -23,6 +23,9 @@ export BZIP2_SUPPORT
 BZIP2_CMD="@BZIP2_CMD@"
 export BZIP2_CMD
 
+XZ_CMD="@XZ_CMD@"
+export XZ_CMD
+
 LIBARCHIVE_LIBS="@LIBARCHIVE_LIBS@"
 export LIBARCHIVE_LIBS
 

configure.ac

@@ -82,6 +82,7 @@ AC_PROG_MAKE_SET
 AC_PATH_PROG(BZIP2_CMD, [bzip2])
 AC_PATH_PROG(RE2C_CMD, [re2c])
 AM_CONDITIONAL(HAVE_RE2C, test x"$RE2C_CMD" != x"")
+AC_PATH_PROG(XZ_CMD, [xz])
 
 AC_CHECK_SIZEOF(off_t)
 AC_CHECK_SIZEOF(size_t)

test/Makefile.am

@@ -364,6 +364,7 @@ DISTCLEANFILES = \
 	*.tmp \
 	*.gz \
 	*.bz2 \
+	*.xz \
 	hw.txt \
 	hw2.txt \
 	reload_test.0 \

test/test_logfile.sh

@@ -38,6 +38,20 @@ EOF
 fi
 
 if test x"${LIBARCHIVE_LIBS}" != x""; then
+    if test x"${XZ_CMD}" != x""; then
+        ${XZ_CMD} -z -c ${srcdir}/logfile_syslog.1 > logfile_syslog.1.xz
+
+        run_test env TMPDIR=tmp ${lnav_test} -n \
+            logfile_syslog.1.xz
+
+        check_output "decompression not working" <<EOF
+Dec  3 09:23:38 veridian automount[7998]: lookup(file): lookup for foobar failed
+Dec  3 09:23:38 veridian automount[16442]: attempting to mount entry /auto/opt
+Dec  3 09:23:38 veridian automount[7999]: lookup(file): lookup for opt failed
+Jan  3 09:47:02 veridian sudo: timstack : TTY=pts/6 ; PWD=/auto/wstimstack/rpms/lbuild/test ; USER=root ; COMMAND=/usr/bin/tail /var/log/messages
+EOF
+    fi
+
     (cd ${srcdir} && tar cfz ${builddir}/test-logs.tgz logfile_access_log.* logfile_empty.0 -C ${builddir} ../src/lnav)
 
     dd if=test-logs.tgz of=test-logs-trunc.tgz bs=4096 count=20