adding tests

tests/hello_test.cpp

@@ -0,0 +1,16 @@
+#include <gtest/gtest.h>
+#include "../opennurbs_public.h"
+
+# define M_PI           3.14159265358979323846  /* pi */
+
+TEST(HelloTest, BasicAssertions) {
+
+  ON_3dPoint center(0,0,0);
+
+  ON_Circle circle(center, 10.00);
+
+  double circumference = 2 * M_PI * circle.radius;
+
+  EXPECT_EQ(circumference, circle.Circumference());
+  
+}