From 4b97d8bcdad920f91a5a81338bd84e053a9b06fa Mon Sep 17 00:00:00 2001
From: Alibek Omarov <a1ba.omarov@gmail.com>
Date: Tue, 5 Nov 2019 11:21:40 +0300
Subject: [PATCH] public: add simple C89-compatible testing framework (wip)

---
 public/tests/test_unittest.c | 24 ++++++++++
 public/unittest.h            | 87 ++++++++++++++++++++++++++++++++++++
 2 files changed, 111 insertions(+)
 create mode 100644 public/tests/test_unittest.c
 create mode 100644 public/unittest.h

diff --git a/public/tests/test_unittest.c b/public/tests/test_unittest.c
new file mode 100644
index 00000000..6e16a195
--- /dev/null
+++ b/public/tests/test_unittest.c
@@ -0,0 +1,24 @@
+#include "unittest.h"
+#include <math.h>
+
+TEST_FIRST(helloworld)
+{
+}
+
+TEST3(hw2, helloworld, "Hello, World")
+{
+}
+
+TEST(nonsense, hw2)
+{
+	if( !( sin( 0 ) != 0.0 ))
+		_self->status = 1;
+}
+
+TEST(sense, nonsense)
+{
+	if( !( sin( 0 ) == 0.0 ) )
+		_self->status = 1;
+}
+
+IMPLEMENT_MAIN(sense, "self-testing")
diff --git a/public/unittest.h b/public/unittest.h
new file mode 100644
index 00000000..015f458a
--- /dev/null
+++ b/public/unittest.h
@@ -0,0 +1,87 @@
+/*
+unittest.h - simple unnamed unit testing framework
+Copyright (C) 2019 a1batross
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+*/
+#ifndef UNITTEST_H
+#define UNITTEST_H
+
+#include <stdio.h>
+
+struct unittest_s;
+typedef void (*pfnTest_t)( struct unittest_s *_self );
+typedef struct unittest_s
+{
+	int status; // 0 if succeeded otherwise failed, you can use it as return code
+	const char *name;
+	pfnTest_t pfn;
+	struct unittest_s *next;
+} unittest_t;
+
+#define TEST_FIRST_FUNC3(_name, _pfn, _readname) \
+	unittest_t _name = { 0, ( _readname ), ( _pfn ), NULL }
+
+#define TEST_FIRST_FUNC2(_name, _pfn) \
+	TEST_FIRST_FUNC3(_name, _pfn, #_name)
+
+#define TEST_FUNC4(_name, _prevname, _pfn, _readname) \
+	unittest_t _name = { 0, ( _readname ), ( _pfn ), &( _prevname ) }
+
+#define TEST_FUNC3(_name, _prevname, _pfn) \
+	TEST_FUNC4(_name, _prevname, _pfn, #_name)
+
+#define DECLARE_TEST_FUNC(_name) \
+	void fn ## _name( struct unittest_s *_self )
+
+#define TEST3(_name, _prevname, _readname) \
+	DECLARE_TEST_FUNC(_name); \
+	TEST_FUNC4(_name, _prevname, fn ## _name, _readname ); \
+	DECLARE_TEST_FUNC(_name)
+	// {
+	// 	your code goes here;
+	// }
+
+#define TEST(_name, _prevname) \
+	TEST3(_name, _prevname, #_name)
+
+#define TEST_FIRST2(_name, _readname) \
+	DECLARE_TEST_FUNC(_name); \
+	TEST_FIRST_FUNC3(_name, fn ## _name, _readname); \
+	DECLARE_TEST_FUNC(_name)
+
+#define TEST_FIRST(_name) \
+	TEST_FIRST2(_name, #_name)
+
+#define IMPLEMENT_RUNNER(_fnname, _lasttest, _msgfunc, _msg ) \
+	void _fnname( void ) \
+	{ \
+		unittest_t *last = &(_lasttest); \
+		int failed = 0, total = 0; \
+		_msgfunc( "Starting to test '%s'\n", _msg ); \
+		for( ; last; last = last->next ) \
+		{ \
+			_msgfunc( "Checking '%s'\t\t: ", last->name ); \
+			last->pfn( last ); \
+			if( last->status ) \
+			{ \
+				_msgfunc( "FAIL %d\n", last->status ); \
+				failed++; \
+			} \
+			else _msgfunc( "PASS\n" ); \
+			total++; \
+		} \
+		_msgfunc( "Summary: %d failed from %d total\n", failed, total ); \
+	}
+
+#define IMPLEMENT_MAIN(_lasttest, _msg) IMPLEMENT_RUNNER(main, _lasttest, printf, _msg)
+
+#endif // UNITTEST_H