From e8c790b3ceab06eb0433c3a234d3e16980f7ef19 Mon Sep 17 00:00:00 2001
From: Carl Worth <cworth@cworth.org>
Date: Mon, 10 May 2010 16:21:10 -0700
Subject: [PATCH] Add a very simple test for the pre-processor.

Validate desired test cases by ensuring the output of glcpp matches
the output of the gcc preprocessor, (ignoring any lines of the gcc
output beginning with '#').

Only one test case so far with a trivial #define.
---
 .gitignore         | 3 +++
 Makefile           | 4 ++++
 tests/001-define.c | 2 ++
 tests/glcpp-test   | 9 +++++++++
 4 files changed, 18 insertions(+)
 create mode 100644 tests/001-define.c
 create mode 100755 tests/glcpp-test

diff --git a/.gitignore b/.gitignore
index 5bbd660f22b..d67bd38c93c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,3 +4,6 @@ glcpp-parse.c
 glcpp-parse.h
 *.o
 *~
+tests/*.expected
+tests/*.gcc
+tests/*.out
diff --git a/Makefile b/Makefile
index d37e9233ec0..38cc1f314a9 100644
--- a/Makefile
+++ b/Makefile
@@ -10,5 +10,9 @@ glcpp: glcpp.o glcpp-lex.o glcpp-parse.o hash_table.o
 
 glcpp-lex.c: glcpp-parse.h
 
+test:
+	@(cd tests; ./glcpp-test)
+
 clean:
 	rm -f glcpp-lex.c glcpp-parse.c *.o *~
+	rm -f tests/*.out tests/*.gcc tests/*.expected
diff --git a/tests/001-define.c b/tests/001-define.c
new file mode 100644
index 00000000000..cbf2fee0e75
--- /dev/null
+++ b/tests/001-define.c
@@ -0,0 +1,2 @@
+#define foo 1
+foo
diff --git a/tests/glcpp-test b/tests/glcpp-test
new file mode 100755
index 00000000000..25685eeabe5
--- /dev/null
+++ b/tests/glcpp-test
@@ -0,0 +1,9 @@
+#!/bin/sh
+
+for test in *.c; do
+    echo "Testing $test"
+    ../glcpp < $test > $test.out
+    gcc -E $test -o $test.gcc
+    grep -v '^#' < $test.gcc > $test.expected
+    diff -u $test.expected $test.out
+done
-- 
2.30.2