3 files changed, 69 insertions, 0 deletions
diff --git a/test/main.cpp b/test/main.cpp
new file mode 100644
index 0000000..4ed06df
--- /dev/null
+++ b/test/main.cpp
@@ -0,0 +1,2 @@
+#define CATCH_CONFIG_MAIN
+#include <catch2/catch.hpp>
diff --git a/test/object.cpp b/test/object.cpp
new file mode 100644
index 0000000..bbce055
--- /dev/null
+++ b/test/object.cpp
@@ -0,0 +1,36 @@
+#include <object.hpp>
+#include <ray.hpp>
+#include <common.hpp>
+#include <vector.hpp>
+
+#include <catch2/catch.hpp>
+#include <math.h>
+
+TEST_CASE("Sphere normal at", "[sphere]") {
+    auto sph = Sphere(Vec3d(2, 3, 4), 2);
+
+    auto norm = sph.norm_at(Vec3d(2, 3, 2), Vec3d());
+    REQUIRE(norm.m_x == 0);
+    REQUIRE(norm.m_y == 0);
+    REQUIRE(norm.m_z == -1);
+}
+
+TEST_CASE("Sphere intersect", "[sphere]") {
+    auto sph = Sphere(Vec3d(2, 3, 4), 2);
+    auto ray = Ray(Vec3d(1, 0, 0), Vec3d(0, 1, 1.5), true);
+
+    auto dist = sph.intersect(ray, false);
+    REQUIRE(abs(dist - 3.28) < 0.01);
+}
+
+TEST_CASE("Plane intersect", "[plane]") {
+    auto pln = Plane(Vec3d(3, 4, 2), Vec3d(-6, -3, -2));
+    auto ray = Ray(Vec3d(0, 0, 0), Vec3d(-2, -1, 5));
+
+    auto dist = pln.intersect(ray, false);
+    REQUIRE(dist == -1);
+
+    ray = Ray(Vec3d(-2, -2, 0), Vec3d(-2, -1, 5));
+    dist = pln.intersect(ray, false);
+    REQUIRE(abs(dist - 20.4) < 0.1);
+}
diff --git a/test/vector.cpp b/test/vector.cpp
new file mode 100644
index 0000000..61648c6
--- /dev/null
+++ b/test/vector.cpp
@@ -0,0 +1,31 @@
+#include <vector.hpp>
+#include <common.hpp>
+#include <catch2/catch.hpp>
+
+TEST_CASE( "Vector length", "[vector]" ) {
+    auto vec = Vec3d(2, 4, 4);
+    REQUIRE(vec.length() == 6);
+    vec.set(0, 0, 0);
+    REQUIRE(vec.length() == 0);
+    vec.set(0, 3.5, 0);
+    REQUIRE(vec.length() == 3.5);
+}
+
+TEST_CASE("Vector_normal", "[vector]") {
+    auto vec = Vec3d(4, 5, 4545);
+    REQUIRE(vec.length() != 1.0);
+    vec.normalize();
+    REQUIRE(vec.length() - 1.0 < ZERO_APPROX);
+    vec.set(0, 0, 0);
+    REQUIRE_THROWS(vec.normalize());
+}
+
+TEST_CASE("Vector dot", "[vector]") {
+    auto a = Vec3d(4, 5, 6);
+    auto b = Vec3d(1, 2, 3);
+    REQUIRE(a.dot(b) == 32);
+    a.set(0, 0, 0);
+    REQUIRE(a.dot(b) == 0);
+    a.set(0, 5, 0);
+    REQUIRE(a.dot(b) == 10);
+}