Added cross product test

tests/test_TinyVector.cpp

@@ -67,9 +67,17 @@ TEST_CASE("TinyVector", "[algebra]") {
 
   REQUIRE(l2Norm(TinyVector<2,double>(3,4)) == Approx(5).epsilon(1E-14));
 
+  SECTION("checking for cross product") {
+    const TinyVector<3,int> a(1,-2,4);
+    const TinyVector<3,int> b(3, 1,6);
+    REQUIRE(crossProduct(a, b) == TinyVector<3,int>(-16,6,7));
+  }
+
 #ifndef NDEBUG
-  REQUIRE_THROWS_AS(x[4]=0, AssertError);
-  const TinyVector<3,int>& const_x = x;
-  REQUIRE_THROWS_AS(const_x[-1], AssertError);
+  SECTION("checking for bounds validation") {
+    REQUIRE_THROWS_AS(x[4]=0, AssertError);
+    const TinyVector<3,int>& const_x = x;
+    REQUIRE_THROWS_AS(const_x[-1], AssertError);
+  }
 #endif // NDEBUG
 }