From 2bf1c0cbcfc08646c180c3ebb5bbac027940942e Mon Sep 17 00:00:00 2001
From: rillig <rillig@NetBSD.org>
Date: Sun, 25 Apr 2021 21:05:38 +0000
Subject: [PATCH] tests/make: add tests for ${...} without operator in
 conditions

These tests are already covered in cond-cmp-unary.mk, but my first guess
was to search for these tests in cond-token-var.mk, so keep them in both
tests.
---
 usr.bin/make/unit-tests/cond-token-var.mk | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/usr.bin/make/unit-tests/cond-token-var.mk b/usr.bin/make/unit-tests/cond-token-var.mk
index 30eba87ad4d2..168c63c46ac1 100644
--- a/usr.bin/make/unit-tests/cond-token-var.mk
+++ b/usr.bin/make/unit-tests/cond-token-var.mk
@@ -1,4 +1,4 @@
-# $NetBSD: cond-token-var.mk,v 1.5 2020/11/15 14:58:14 rillig Exp $
+# $NetBSD: cond-token-var.mk,v 1.6 2021/04/25 21:05:38 rillig Exp $
 #
 # Tests for variable expressions in .if conditions.
 #
@@ -46,3 +46,24 @@ DEF=	defined
 # Since the expression is defined now, it doesn't generate any parse error.
 .if ${UNDEF:U}
 .endif
+
+# If the value of the variable expression is a number, it is compared against
+# zero.
+.if ${:U0}
+.  error
+.endif
+.if !${:U1}
+.  error
+.endif
+
+# If the value of the variable expression is not a number, any non-empty
+# value evaluates to true, even if there is only whitespace.
+.if ${:U}
+.  error
+.endif
+.if !${:U }
+.  error
+.endif
+.if !${:Uanything}
+.  error
+.endif