Merge lp:~michihenning/nux/random-color into lp:nux

[Michi Henning]

Added unit test for RandomColor().

Added unit test for RandomColor().

=== modified file 'tests/gtest-nuxcore-color.cpp'
--- tests/gtest-nuxcore-color.cpp	2012-11-22 02:40:42 +0000
+++ tests/gtest-nuxcore-color.cpp	2012-11-23 08:16:19 +0000
@@ -322,5 +322,40 @@
   EXPECT_EQ(rgb.blue, color.blue);
 }
 
-}
-
+TEST(TestColor, TestRandomColor)
+{
+    float rmin = 1.0f;
+    float rmax = 0.0f;
+    float gmin = 1.0f;
+    float gmax = 0.0f;
+    float bmin = 1.0f;
+    float bmax = 0.0f;
+
+    for (int i = 0; i < 100; ++i)
+    {
+        nux::Color c = nux::color::RandomColor();
+        EXPECT_EQ(1.0f, c.alpha);
+        rmin = std::min(rmin, c.red);
+        rmax = std::max(rmax, c.red);
+        gmin = std::min(gmin, c.green);
+        gmax = std::max(gmax, c.green);
+        bmin = std::min(bmin, c.blue);
+        bmax = std::max(bmax, c.blue);
+    }
+
+    // Ultra unlikely that we create 100 identical values in a row.
+    // The universe will end long before this happens.
+    EXPECT_NE(rmin, rmax);
+    EXPECT_NE(gmin, gmax);
+    EXPECT_NE(bmin, bmax);
+
+    // Values must have changed from the initial settings
+    EXPECT_NE(1.0f, rmin);
+    EXPECT_NE(0.0f, rmax);
+    EXPECT_NE(1.0f, gmin);
+    EXPECT_NE(0.0f, gmax);
+    EXPECT_NE(1.0f, bmin);
+    EXPECT_NE(0.0f, bmax);
+}
+
+}