1 files changed, 26 insertions, 0 deletions
diff --git a/unit-tests/directive-include.mk b/unit-tests/directive-include.mk
new file mode 100755
index 0000000000000..d71b27ef2c630
--- /dev/null
+++ b/unit-tests/directive-include.mk
@@ -0,0 +1,26 @@
+# $NetBSD: directive-include.mk,v 1.3 2020/10/31 23:01:23 rillig Exp $
+#
+# Tests for the .include directive, which includes another file.
+
+# TODO: Implementation
+
+.MAKEFLAGS: -dc
+
+# All included files are recorded in the variable .MAKE.MAKEFILES.
+# In this test, only the basenames of the files are compared since
+# the directories can differ.
+.include "/dev/null"
+.if ${.MAKE.MAKEFILES:T} != "${.PARSEFILE} null"
+.  error
+.endif
+
+# Each file is recorded only once in the variable .MAKE.MAKEFILES.
+# Between 2015-11-26 and 2020-10-31, the very last file could be repeated,
+# due to an off-by-one bug in ParseTrackInput.
+.include "/dev/null"
+.if ${.MAKE.MAKEFILES:T} != "${.PARSEFILE} null"
+.  error
+.endif
+
+all:
+	@:;