[src/trunk]: src/usr.bin/make/unit-tests make(1): add test cases for the :ran...

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

details:   https://anonhg.NetBSD.org/src/rev/531105af8f91
branches:  trunk
changeset: 939685:531105af8f91
user:      rillig <rillig%NetBSD.org@localhost>
date:      Sun Sep 27 18:11:31 2020 +0000

description:
make(1): add test cases for the :range variable modifier

diffstat:

 usr.bin/make/unit-tests/varmod-range.mk |  30 +++++++++++++++++++++++++++++-
 1 files changed, 29 insertions(+), 1 deletions(-)

diffs (41 lines):

diff -r 9548f623a851 -r 531105af8f91 usr.bin/make/unit-tests/varmod-range.mk
--- a/usr.bin/make/unit-tests/varmod-range.mk   Sun Sep 27 17:51:48 2020 +0000
+++ b/usr.bin/make/unit-tests/varmod-range.mk   Sun Sep 27 18:11:31 2020 +0000
@@ -1,8 +1,36 @@
-# $NetBSD: varmod-range.mk,v 1.3 2020/08/23 15:13:21 rillig Exp $
+# $NetBSD: varmod-range.mk,v 1.4 2020/09/27 18:11:31 rillig Exp $
 #
 # Tests for the :range variable modifier, which generates sequences
 # of integers from the given range.
 
+# The :range modifier generates a sequence of integers, one number per
+# word of the variable expression's value.
+.if ${a b c:L:range} != "1 2 3"
+.  error
+.endif
+
+# To preserve spaces in a word, they can be enclosed in quotes, just like
+# everywhere else.
+.if ${:U first "the second word" third 4 :range} != "1 2 3 4"
+.  error
+.endif
+
+# The :range modifier takes the number of words from the value of the
+# variable expression.  If that expression is undefined, the range is
+# undefined as well.  This should not come as a surprise.
+.if "${:range}" != ""
+.  error
+.endif
+
+# The :range modifier can be given a parameter, which makes the generated
+# range independent from the value or the name of the variable expression.
+#
+# XXX: As of 2020-09-27, the :range=... modifier does not turn the undefined
+# expression into a defined one.  This looks like an oversight.
+.if "${:range=5}" != ""
+.  error
+.endif
+
 all:
        @echo ${a b c:L:rang}                   # modifier name too short
        @echo ${a b c:L:range}                  # ok