test: add missing quaternion unit tests.

test/unit/quat.cpp

@@ -0,0 +1,129 @@
+//
+// Lol Engine
+//
+// Copyright: (c) 2010-2011 Sam Hocevar <sam@hocevar.net>
+//   This program is free software; you can redistribute it and/or
+//   modify it under the terms of the Do What The Fuck You Want To
+//   Public License, Version 2, as published by Sam Hocevar. See
+//   http://sam.zoy.org/projects/COPYING.WTFPL for more details.
+//
+
+#if defined HAVE_CONFIG_H
+#   include "config.h"
+#endif
+
+#include "core.h"
+#include "lol/unit.h"
+
+namespace lol
+{
+
+LOLUNIT_FIXTURE(QuaternionTest)
+{
+    void SetUp() {}
+
+    void TearDown() {}
+
+    LOLUNIT_TEST(Equality)
+    {
+        quat a4(1.0f, 2.0f, 3.0f, 4.0f);
+        quat b4(0.0f, 2.0f, 3.0f, 4.0f);
+        quat c4(1.0f, 0.0f, 3.0f, 4.0f);
+        quat d4(1.0f, 2.0f, 0.0f, 4.0f);
+        quat e4(1.0f, 2.0f, 3.0f, 0.0f);
+
+        LOLUNIT_ASSERT_EQUAL(a4, a4);
+        LOLUNIT_ASSERT_NOT_DIFFERENT(a4, a4);
+
+        LOLUNIT_ASSERT_DIFFERENT(a4, b4);
+        LOLUNIT_ASSERT_NOT_EQUAL(a4, b4);
+        LOLUNIT_ASSERT_DIFFERENT(a4, c4);
+        LOLUNIT_ASSERT_NOT_EQUAL(a4, c4);
+        LOLUNIT_ASSERT_DIFFERENT(a4, d4);
+        LOLUNIT_ASSERT_NOT_EQUAL(a4, d4);
+        LOLUNIT_ASSERT_DIFFERENT(a4, e4);
+        LOLUNIT_ASSERT_NOT_EQUAL(a4, e4);
+    }
+
+    LOLUNIT_TEST(UnaryMinus)
+    {
+        quat a(1.0f, 3.0f, 2.0f, 4.0f);
+        quat b(-1.0f, -3.0f, -2.0f, -4.0f);
+
+        LOLUNIT_ASSERT_EQUAL(a, -b);
+        LOLUNIT_ASSERT_EQUAL(-a, b);
+    }
+
+    LOLUNIT_TEST(Conjugate)
+    {
+        quat a(1.0f, 3.0f, 2.0f, 4.0f);
+        quat b(-1.0f, -3.0f, -2.0f, 4.0f);
+
+        LOLUNIT_ASSERT_EQUAL(a, ~b);
+        LOLUNIT_ASSERT_EQUAL(~a, b);
+    }
+
+    LOLUNIT_TEST(Norm)
+    {
+        quat a(2.0f, -2.0f, -8.0f, 3.0f);
+
+        LOLUNIT_ASSERT_EQUAL(a.norm(), 81.0f);
+
+        quat b = a * ~a;
+        quat c(0.0f, 0.0f, 0.0f, a.norm());
+
+        LOLUNIT_ASSERT_EQUAL(b, c);
+
+        quat d(2.0f, 3.0f, -4.0f, -1.0f);
+
+        LOLUNIT_ASSERT_EQUAL((a * d).norm(), a.norm() * d.norm());
+    }
+
+    LOLUNIT_TEST(Base)
+    {
+        quat i(1.0f, 0.0f, 0.0f, 0.0f);
+        quat j(0.0f, 1.0f, 0.0f, 0.0f);
+        quat k(0.0f, 0.0f, 1.0f, 0.0f);
+        quat one(0.0f, 0.0f, 0.0f, 1.0f);
+
+        LOLUNIT_ASSERT_EQUAL(i.norm(), 1.0f);
+        LOLUNIT_ASSERT_EQUAL(j.norm(), 1.0f);
+        LOLUNIT_ASSERT_EQUAL(k.norm(), 1.0f);
+        LOLUNIT_ASSERT_EQUAL(one.norm(), 1.0f);
+
+        LOLUNIT_ASSERT_EQUAL(i * i, -one);
+        LOLUNIT_ASSERT_EQUAL(j * j, -one);
+        LOLUNIT_ASSERT_EQUAL(k * k, -one);
+        LOLUNIT_ASSERT_EQUAL(i * j * k, -one);
+
+        LOLUNIT_ASSERT_EQUAL(i * j, k);
+        LOLUNIT_ASSERT_EQUAL(j * i, -k);
+        LOLUNIT_ASSERT_EQUAL(j * k, i);
+        LOLUNIT_ASSERT_EQUAL(k * j, -i);
+        LOLUNIT_ASSERT_EQUAL(k * i, j);
+        LOLUNIT_ASSERT_EQUAL(i * k, -j);
+    }
+
+    LOLUNIT_TEST(Normalize)
+    {
+        quat a(2.0f, -2.0f, -8.0f, 3.0f);
+        quat b = normalize(a);
+
+        LOLUNIT_ASSERT_DOUBLES_EQUAL(b.norm(), 1.0, 1e-8);
+    }
+
+    LOLUNIT_TEST(Reciprocal)
+    {
+        quat a(2.0f, -2.0f, -8.0f, 3.0f);
+        quat b = re(a);
+
+        LOLUNIT_ASSERT_EQUAL(a * b, b * a);
+
+        quat c = 1.0f;
+
+        LOLUNIT_ASSERT_EQUAL(a * b, c);
+    }
+};
+
+} /* namespace lol */
+