tests: add strace-ttt.test

* tests/strace-ttt.test: New test.
* tests/Makefile.am (MISC_TESTS): Add it.
diff --git a/tests/Makefile.am b/tests/Makefile.am
index c6c64bd..a1ce5fa 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -384,6 +384,7 @@
 	strace-f.test \
 	strace-t.test \
 	strace-tt.test \
+	strace-ttt.test \
 	vfork-f.test \
 	# end of MISC_TESTS
 
diff --git a/tests/strace-ttt.test b/tests/strace-ttt.test
new file mode 100755
index 0000000..8b0032a
--- /dev/null
+++ b/tests/strace-ttt.test
@@ -0,0 +1,20 @@
+#!/bin/sh
+
+# Check -ttt option.
+
+. "${srcdir=.}/init.sh"
+
+run_prog_skip_if_failed date +%s > /dev/null
+run_prog ./sleep 0
+
+t0="$(date +%s)"
+run_strace -ttt -eexecve $args
+t1="$(date +%s)"
+
+EXPECTED="$LOG.expected"
+cat > "$EXPECTED" << __EOF__
+($t0|$t1)\\.[[:digit:]]{6} execve\\("\\./sleep", \\["\\./sleep", "0"\\], \\[/\\* [[:digit:]]+ vars \\*/\\]\\) = 0
+__EOF__
+
+match_grep "$LOG" "$EXPECTED"
+rm -f "$EXPECTED"