+
+# Check that the given command was invoked as part of the
+# trace2-format trace on stdin.
+#
+# test_subcommand [!] <command> <args>... < <trace>
+#
+# For example, to look for an invocation of "git upload-pack
+# /path/to/repo"
+#
+# GIT_TRACE2_EVENT=event.log git fetch ... &&
+# test_subcommand git upload-pack "$PATH" <event.log
+#
+# If the first parameter passed is !, this instead checks that
+# the given command was not called.
+#
+test_subcommand () {
+ local negate=
+ if test "$1" = "!"
+ then
+ negate=t
+ shift
+ fi
+
+ local expr=$(printf '"%s",' "$@")
+ expr="${expr%,}"
+
+ if test -n "$negate"
+ then
+ ! grep "\[$expr\]"
+ else
+ grep "\[$expr\]"
+ fi
+}