Add regression test for joining on NULL columns.

4 files changed, 13 insertions, 2 deletions

diff --git a/regress/usr.bin/join/Makefile b/regress/usr.bin/join/Makefile
index 949c21cffde..d268d384b0f 100644
--- a/regress/usr.bin/join/Makefile
+++ b/regress/usr.bin/join/Makefile
@@ -1,8 +1,8 @@
-# $OpenBSD: Makefile,v 1.2 2018/10/18 09:40:14 otto Exp $
+# $OpenBSD: Makefile,v 1.3 2018/10/23 08:45:49 martijn Exp $
 
 JION=join
 
-REGRESS_TARGETS=t1 t2 t3 t4 t5 t6 t7
+REGRESS_TARGETS=t1 t2 t3 t4 t5 t6 t7 t8
 
 t1:
 	join -t "	" -a 1 -a 2 -e '(unknown)' -o 0,1.2,2.2 ${.CURDIR}/phone ${.CURDIR}/fax > ${*}.log
@@ -39,6 +39,11 @@ t7:
 	@cmp -s ${.CURDIR}/${*}.out ${*}.log || \
 		(echo "XXX ${*} failed" && false)
 
+t8:
+	join -j 2 -e empty ${.CURDIR}/t8a.in ${.CURDIR}/t8b.in > ${*}.log
+	@cmp -s ${.CURDIR}/${*}.out ${*}.log || \
+		(echo "XXX ${*} failed" && false)
+
 clean:
 	rm -f *.log
 
diff --git a/regress/usr.bin/join/t8.out b/regress/usr.bin/join/t8.out
new file mode 100644
index 00000000000..7821f210c27
--- /dev/null
+++ b/regress/usr.bin/join/t8.out
@@ -0,0 +1,2 @@
+empty a a
+d b c
diff --git a/regress/usr.bin/join/t8a.in b/regress/usr.bin/join/t8a.in
new file mode 100644
index 00000000000..a2afabdc014
--- /dev/null
+++ b/regress/usr.bin/join/t8a.in
@@ -0,0 +1,2 @@
+a
+b d
diff --git a/regress/usr.bin/join/t8b.in b/regress/usr.bin/join/t8b.in
new file mode 100644
index 00000000000..00028f4531f
--- /dev/null
+++ b/regress/usr.bin/join/t8b.in
@@ -0,0 +1,2 @@
+a
+c d