Fix testing mechanism.

test/vector3.cpp

@@ -1,7 +1,7 @@
-#include <assert.h>
 #include <stdio.h>
 
 #include <matrix/math.hpp>
+#include "test_macros.hpp"
 
 using namespace matrix;
 
@@ -13,15 +13,15 @@ int main()
     Vector3f b(0, 1, 0);
     Vector3f c = a.cross(b);
     c.print();
-    assert (c == Vector3f(0,0,1));
+    TEST (c == Vector3f(0,0,1));
     c = a % b;
-    assert (c == Vector3f(0,0,1));
+    TEST (c == Vector3f(0,0,1));
     Matrix<float, 3, 1> d(c);
     Vector3f e(d);
-    assert (e == d);
+    TEST (e == d);
     float data[] = {4, 5, 6};
     Vector3f f(data);
-    assert (f == Vector3f(4, 5, 6));
+    TEST (f == Vector3f(4, 5, 6));
     return 0;
 }