2 files changed, 123 insertions, 0 deletions
diff --git a/src/lily-test.h b/src/lily-test.h
new file mode 100644
index 0000000..8ce0f41
--- /dev/null
+++ b/src/lily-test.h
@@ -0,0 +1,30 @@
+#ifndef LILY_TEST_H
+#define LILY_TEST_H
+
+#define lily_test const char *
+
+struct lily_test_data_t {
+   int tests_run;
+   int tests_failed;
+};
+
+#define LILY_INIT()					\
+   struct lily_test_data_t lily_test_data = { 0, 0 };
+
+
+// helper macros to turn numerical constants into strings
+#define STR_IMPL(x) #x
+#define STR(X) STR_IMPL(x)
+
+
+// assertion macros
+#define lily_indent "   "
+#define lily_assert(statement, message)					\
+   do {									\
+      if (!(statement))							\
+	 return "" message							\
+	    "\n" lily_indent " [" __FILE__ ":" STR(__LINE__) "]";	\
+   } while(0)
+
+
+#endif
diff --git a/src/test.c b/src/test.c
new file mode 100644
index 0000000..146f636
--- /dev/null
+++ b/src/test.c
@@ -0,0 +1,93 @@
+#include <stdio.h>
+#include <stdbool.h>
+#include <string.h>
+#include <stdlib.h>
+
+#include "lily-test.h"
+
+LILY_INIT();
+
+void run_test(const char *name, lily_test (*fp)())
+{
+   printf("%s... ", name);
+   const char *result = fp();
+   if (result != 0) {
+      printf("FAILED (%s)\n", result);
+   }
+   else
+      printf("OK\n");
+}
+
+
+lily_test check_init()
+{
+   // should fail to compile if lily_test_data is undefined
+   if (lily_test_data.tests_run != 0)
+      return "tests_run is not equal to zero!";
+   if (lily_test_data.tests_failed != 0)
+      return "tests_failed is not equal to zero!";
+   return 0;
+}
+
+
+int get_message(char **destination, const char *source)
+{
+   const char *s = source;
+   size_t size = 0;
+   while (*s != '\n') {
+      if (*s == 0)
+	 return false;
+      s++;
+      size++;
+   }
+
+   *destination = malloc((size+1) * sizeof(char));
+   strncpy(*destination, source, size);
+   (*destination)[size] = 0;
+   return true;
+}
+
+#define assert_msg "message"
+
+lily_test wrap_assert(bool statement)
+{
+   lily_assert(statement, assert_msg);
+   return 0;
+}
+
+lily_test check_assert()
+{
+   if (wrap_assert(true) != 0)
+      return "true assertion did not return 0!";
+
+   const char *result = wrap_assert(false);
+   
+   if (result == 0)
+      return "false assertion returned zero!";
+
+   char *message;
+   if (!get_message(&message, result))
+      return "false assertion contained malformed message!";
+
+   if (strcmp(message, assert_msg) != 0)
+      return "false assertion message was not '" assert_msg "'!";
+   free(message);
+
+   return 0;
+}
+
+
+lily_test check_other_asserts()
+{
+   
+}
+
+
+int main()
+{
+   run_test("check LILY_INIT()", check_init);
+   run_test("check basic assertion", check_assert);
+
+   printf("all tests finished.\n");
+   return 0;
+}