Add test_asserts module

test/SConscript

@@ -9,6 +9,7 @@ Import('env')
 Import('charles_lib')
 
 files = Split("""
+    test_asserts.c
     test_basics.c
     test_charles.c
     test_object.c

test/test_asserts.c

@@ -0,0 +1,16 @@
+/* test_asserts.c
+ *
+ * Some helpful asserts built on Check's asserts.
+ *
+ * Eryn Wells <eryn@erynwells.me>
+ */
+
+#include <check.h>
+#include "test_asserts.h"
+
+
+void
+test_assert_within_epsilon(float value, float expected, float epsilon)
+{
+    ck_assert(value >= (expected - epsilon) && value <= (expected + epsilon));
+}

test/test_asserts.h

@@ -0,0 +1,15 @@
+/* test_asserts.h
+ *
+ * Some helpful asserts built on Check's asserts.
+ *
+ * Eryn Wells <eryn@erynwells.me>
+ */
+
+#ifndef __TEST_ASSERT_H__
+#define __TEST_ASSERT_H__
+
+
+void test_assert_within_epsilon(float value, float expected, float epsilon);
+
+
+#endif