[test] Add a basic infrastructure for running self-tests

This self-test mechanism is inspired by Perl's Test::Simple and
similar modules.  The aim is to encourage the use of self-tests by
making it as easy as possible to create self-test code

Signed-off-by: Michael Brown <mcb30@ipxe.org>

src/include/ipxe/test.h

@@ -0,0 +1,45 @@
+#ifndef _IPXE_TEST_H
+#define _IPXE_TEST_H
+
+FILE_LICENCE ( GPL2_OR_LATER );
+
+/** @file
+ *
+ * Self-test infrastructure
+ *
+ */
+
+#include <ipxe/tables.h>
+
+/** A self-test set */
+struct self_test {
+	/** Test set name */
+	const char *name;
+	/** Run self-tests */
+	void ( * exec ) ( void );
+	/** Number of tests run */
+	unsigned int total;
+	/** Number of test failures */
+	unsigned int failures;
+	/** Number of assertion failures */
+	unsigned int assertion_failures;
+};
+
+/** Self-test table */
+#define SELF_TESTS __table ( struct self_test, "self_tests" )
+
+/** Declare a self-test */
+#define __self_test __table_entry ( SELF_TESTS, 01 )
+
+extern void test_ok ( int success, const char *file, unsigned int line );
+
+/**
+ * Report test result
+ *
+ * @v success		Test succeeded
+ */
+#define ok( success ) do {				\
+	test_ok ( (success), __FILE__, __LINE__ );	\
+	} while ( 0 )
+
+#endif /* _IPXE_TEST_H */