From 2e0cb4037308050a2ffd0eb28ee9813b1355a789 Mon Sep 17 00:00:00 2001
From: Joshua Simmons <josh@nega.tv>
Date: Sun, 13 Nov 2022 23:35:41 +0100
Subject: [PATCH] Add test for cross product :)

---
 narcissus-maths/src/vec3.rs | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/narcissus-maths/src/vec3.rs b/narcissus-maths/src/vec3.rs
index fb2b282..24592e2 100644
--- a/narcissus-maths/src/vec3.rs
+++ b/narcissus-maths/src/vec3.rs
@@ -157,3 +157,20 @@ impl std::ops::DivAssign for Vec3 {
         self.z /= rhs.z;
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn cross_product() {
+        assert_eq!(
+            Vec3::cross(Vec3::new(1.0, 2.0, 3.0), Vec3::new(4.0, 5.0, 6.0)),
+            Vec3::new(-3.0, 6.0, -3.0)
+        );
+        assert_eq!(
+            Vec3::cross(Vec3::new(2.0, 1.0, 2.0), Vec3::new(3.0, 4.0, 3.0)),
+            Vec3::new(-5.0, 0.0, 5.0)
+        );
+    }
+}
-- 
2.49.0