Defined a base testing library header

This defines useful macros, in particular to print information and to
define tests and test suites.

The idea is a suite will be a set of test functions, where a test
function will fail <=> an assert is called.  This allows us to stop
testing immediately upon a test failing and produce viable output.

test/testing.h

@@ -0,0 +1,38 @@
+/* Copyright (C) 2024 Aryadev Chavali
+
+ * You may distribute and modify this code under the terms of the
+ * GPLv2 license.  You should have received a copy of the GPLv2
+ * license with this file.  If not, please write to:
+ * aryadev@aryadevchavali.com.
+
+ * Created: 2024-04-28
+ * Author: Aryadev Chavali
+ * Description: Base library for creating tests
+ */
+
+#ifndef TESTING_H
+#define TESTING_H
+
+#include <assert.h>
+#include <lib/base.h>
+#include <stdbool.h>
+#include <stdio.h>
+
+#define MESSAGE(COLOUR, NAME, FORMAT, ...) \
+  printf("\t[" COLOUR "%s" TERM_RESET "]: " FORMAT, NAME, __VA_ARGS__)
+
+#define INFO(NAME, FORMAT, ...) MESSAGE(TERM_YELLOW, NAME, FORMAT, __VA_ARGS__)
+#define FAIL(NAME, FORMAT, ...) MESSAGE(TERM_RED, NAME, FORMAT, __VA_ARGS__)
+#define SUCCESS(NAME, FORMAT, ...) \
+  MESSAGE(TERM_GREEN, NAME, FORMAT, __VA_ARGS__)
+
+typedef void (*test_fn)(void);
+
+#define TEST_SUITE(NAME, ...) test_fn NAME[] = {__VA_ARGS__}
+#define RUN_TEST_SUITE(NAME)                     \
+  INFO(#NAME, "%s", "Starting test suite...\n"); \
+  for (size_t i = 0; i < ARR_SIZE(NAME); ++i)    \
+    NAME[i]();                                   \
+  SUCCESS(#NAME, "%s", "Finished test suite!\n")
+
+#endif