Add "join" detection macro.

[dxcommon.git] / tests / programs.at

diff --git a/tests/programs.at b/tests/programs.at
index 90262ef458a819a57afb313ed48243efcde2aaa6..b02d9abc7e94c3a965ab4932576842f74dabde6d 100644 (file)
--- a/tests/programs.at
+++ b/tests/programs.at
@@ -1,4 +1,4 @@
-dnl Copyright © 2020-2021 Nick Bowler
+dnl Copyright © 2020-2022 Nick Bowler
 dnl
 dnl License WTFPL2: Do What The Fuck You Want To Public License, version 2.
 dnl This is free software: you are free to do what the fuck you want to.
@@ -175,3 +175,58 @@ AT_CHECK([grep dx_cv_md5_works test], [0], [dx_cv_md5_works=no
 ])
 
 AT_CLEANUP
+
+AT_SETUP([join probes])
+
+AT_DATA([test.in],
+[[JOIN=@JOIN@
+dx_cv_join_works=@dx_cv_join_works@
+]])
+
+TEST_CONFIGURE_AC([[DX_PROG_JOIN
+AC_SUBST([dx_cv_join_works])
+
+set x conftest*; shift
+if test -f $[]1; then
+  AC_MSG_ERROR([$[]1 left behind by [D@@&t@&t@X_PROG_JOIN]])
+fi
+
+AC_CONFIG_FILES([test])
+]])
+TEST_AUTORECONF
+
+TEST_CONFIGURE([JOIN=true AWK="$AWK"])
+AT_CHECK_UNQUOTED([$AWK '{ print $1 }' test], [0],
+[JOIN=$AWK
+dx_cv_join_works=no
+])
+
+save_IFS=$IFS
+IFS='='; read x JOIN <test
+IFS=$save_IFS
+
+AT_DATA([a],
+[[a
+b
+c
+d
+]])
+
+AT_DATA([b],
+[[b
+d
+d
+]])
+
+AT_CHECK([$JOIN a b], [0], [[b
+d
+d
+]])
+
+TEST_CONFIGURE([JOIN="$JOIN"])
+AT_CHECK_UNQUOTED([cat test], [0],
+[JOIN=$JOIN
+dx_cv_join_works=yes
+])
+
+AT_CLEANUP