From 0328a6dfa334f97f53b10fec8553728561cc006c Mon Sep 17 00:00:00 2001
From: Sam Hocevar <sam@hocevar.net>
Date: Thu, 11 Aug 2011 12:46:05 +0000
Subject: [PATCH] test: add a unit test for the recent vector promotion
 problem.

---
 test/matrix.cpp | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/test/matrix.cpp b/test/matrix.cpp
index cca9ada3..b580d435 100644
--- a/test/matrix.cpp
+++ b/test/matrix.cpp
@@ -28,6 +28,7 @@ class MatrixTest : public CppUnit::TestCase
     CPPUNIT_TEST(test_vec_eq);
     CPPUNIT_TEST(test_vec_lt);
     CPPUNIT_TEST(test_vec_unary);
+    CPPUNIT_TEST(test_vec_cast);
     CPPUNIT_TEST(test_mat_det);
     CPPUNIT_TEST(test_mat_mul);
     CPPUNIT_TEST(test_mat_inv);
@@ -132,6 +133,26 @@ public:
         CPPUNIT_ASSERT(-a == b);
     }
 
+    void test_vec_cast()
+    {
+        vec2 a1(1.0f, 3.0f);
+
+        vec3 b(a1);
+        vec2 a2(b);
+        CPPUNIT_ASSERT(b.x == a1.x);
+        CPPUNIT_ASSERT(b.y == a1.y);
+        CPPUNIT_ASSERT(b.z == 0.0f);
+        CPPUNIT_ASSERT(a2 == a1);
+
+        vec4 c(a1);
+        vec2 a3(c);
+        CPPUNIT_ASSERT(c.x == a1.x);
+        CPPUNIT_ASSERT(c.y == a1.y);
+        CPPUNIT_ASSERT(c.z == 0.0f);
+        CPPUNIT_ASSERT(c.w == 0.0f);
+        CPPUNIT_ASSERT(a3 == a1);
+    }
+
     void test_mat_det()
     {
         float d1 = triangular.det();