[src/trunk]: src/usr.bin/make/unit-tests make(1): add test for variable expre...

[rillig <rillig%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/d01cf28fde80
branches:  trunk
changeset: 937491:d01cf28fde80
user:      rillig <rillig%NetBSD.org@localhost>
date:      Thu Aug 20 19:43:42 2020 +0000

description:
make(1): add test for variable expressions in conditions

diffstat:

 usr.bin/make/unit-tests/cond-token-var.exp |   8 ++++++-
 usr.bin/make/unit-tests/cond-token-var.mk  |  34 ++++++++++++++++++++++++++---
 2 files changed, 37 insertions(+), 5 deletions(-)

diffs (54 lines):

diff -r c2c41bd63a37 -r d01cf28fde80 usr.bin/make/unit-tests/cond-token-var.exp
--- a/usr.bin/make/unit-tests/cond-token-var.exp        Thu Aug 20 18:47:57 2020 +0000
+++ b/usr.bin/make/unit-tests/cond-token-var.exp        Thu Aug 20 19:43:42 2020 +0000
@@ -1,1 +1,7 @@
-exit status 0
+make: "cond-token-var.mk" line 9: ok
+make: "cond-token-var.mk" line 15: Malformed conditional (${UNDEF} == ${DEF})
+make: "cond-token-var.mk" line 20: Malformed conditional (${DEF} == ${UNDEF})
+make: "cond-token-var.mk" line 29: Malformed conditional (${UNDEF})
+make: Fatal errors encountered -- cannot continue
+make: stopped in unit-tests
+exit status 1
diff -r c2c41bd63a37 -r d01cf28fde80 usr.bin/make/unit-tests/cond-token-var.mk
--- a/usr.bin/make/unit-tests/cond-token-var.mk Thu Aug 20 18:47:57 2020 +0000
+++ b/usr.bin/make/unit-tests/cond-token-var.mk Thu Aug 20 19:43:42 2020 +0000
@@ -1,8 +1,34 @@
-# $NetBSD: cond-token-var.mk,v 1.2 2020/08/16 14:25:16 rillig Exp $
+# $NetBSD: cond-token-var.mk,v 1.3 2020/08/20 19:43:42 rillig Exp $
 #
 # Tests for variables in .if conditions.
 
-# TODO: Implementation
+DEF=   defined
+
+# A defined variable may appear on either side of the comparison.
+.if ${DEF} == ${DEF}
+.info ok
+.else
+.error
+.endif
+
+# A variable that appears on the left-hand side must be defined.
+.if ${UNDEF} == ${DEF}
+.error
+.endif
 
-all:
-       @:;
+# A variable that appears on the right-hand side must be defined.
+.if ${DEF} == ${UNDEF}
+.error
+.endif
+
+# A defined variable may appear as an expression of its own.
+.if ${DEF}
+.endif
+
+# An undefined variable generates a warning.
+.if ${UNDEF}
+.endif
+
+# The :U modifier turns an undefined variable into an ordinary expression.
+.if ${UNDEF:U}
+.endif