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[src/trunk]: src/usr.bin/make/unit-tests make(1): add basic tests for the += ...
details: https://anonhg.NetBSD.org/src/rev/1e8f083d9c17
branches: trunk
changeset: 944588:1e8f083d9c17
user: rillig <rillig%NetBSD.org@localhost>
date: Sun Oct 04 10:16:09 2020 +0000
description:
make(1): add basic tests for the += assignment operator
diffstat:
usr.bin/make/unit-tests/var-op-append.mk | 31 +++++++++++++++++++++++++++++--
1 files changed, 29 insertions(+), 2 deletions(-)
diffs (42 lines):
diff -r 316a681a1f9d -r 1e8f083d9c17 usr.bin/make/unit-tests/var-op-append.mk
--- a/usr.bin/make/unit-tests/var-op-append.mk Sun Oct 04 09:42:48 2020 +0000
+++ b/usr.bin/make/unit-tests/var-op-append.mk Sun Oct 04 10:16:09 2020 +0000
@@ -1,9 +1,36 @@
-# $NetBSD: var-op-append.mk,v 1.2 2020/08/16 14:25:16 rillig Exp $
+# $NetBSD: var-op-append.mk,v 1.3 2020/10/04 10:16:09 rillig Exp $
#
# Tests for the += variable assignment operator, which appends to a variable,
# creating it if necessary.
-# TODO: Implementation
+# Appending to an undefined variable is possible.
+# The variable is created, and no extra space is added before the value.
+VAR+= one
+.if ${VAR} != "one"
+. error
+.endif
+
+# Appending to an existing variable adds a single space and the value.
+VAR+= two
+.if ${VAR} != "one two"
+. error
+.endif
+
+# Appending an empty string nevertheless adds a single space.
+VAR+= # empty
+.if ${VAR} != "one two "
+. error
+.endif
+
+# Variable names may contain '+', and this character is also part of the
+# '+=' assignment operator. As far as possible, the '+' is interpreted as
+# part of the assignment operator.
+#
+# See Parse_DoVar
+C++=value
+.if ${C+} != "value" || defined(C++)
+. error
+.endif
all:
@:;
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