From 80ed12fd3133c740ba1b8f6c5a95037ee96a785b Mon Sep 17 00:00:00 2001
From: Andrei Karas <akaras@inbox.ru>
Date: Sun, 9 Aug 2015 16:46:14 +0300
Subject: Add unit tests for mathutils.h

---
 src/Makefile.am                 |   1 +
 src/utils/mathutils_unittest.cc | 102 ++++++++++++++++++++++++++++++++++++++++
 2 files changed, 103 insertions(+)
 create mode 100644 src/utils/mathutils_unittest.cc

diff --git a/src/Makefile.am b/src/Makefile.am
index c8c80bcd6..cf6a2a8a2 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -1472,6 +1472,7 @@ manaplustests_SOURCES = ${manaplus_SOURCES} \
 	      gui/fonts/textchunklist_unittest.cc \
 	      gui/widgets/browserbox_unittest.cc \
 	      utils/files_unittest.cc \
+	      utils/mathutils_unittest.cc \
 	      utils/stringutils_unittest.cc \
 	      utils/xmlutils_unittest.cc \
 	      resources/dye_unittest.cc \
diff --git a/src/utils/mathutils_unittest.cc b/src/utils/mathutils_unittest.cc
new file mode 100644
index 000000000..ac3b239f2
--- /dev/null
+++ b/src/utils/mathutils_unittest.cc
@@ -0,0 +1,102 @@
+/*
+ *  The ManaPlus Client
+ *  Copyright (C) 2013  The ManaPlus Developers
+ *
+ *  This file is part of The ManaPlus Client.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "utils/mathutils.h"
+
+#include "catch.hpp"
+
+#include "debug.h"
+
+TEST_CASE("MathUtils powerOfTwo")
+{
+    REQUIRE(powerOfTwo(0) == 1);
+    REQUIRE(powerOfTwo(1) == 1);
+    REQUIRE(powerOfTwo(2) == 2);
+    REQUIRE(powerOfTwo(3) == 4);
+    REQUIRE(powerOfTwo(4) == 4);
+    REQUIRE(powerOfTwo(5) == 8);
+    REQUIRE(powerOfTwo(6) == 8);
+    REQUIRE(powerOfTwo(7) == 8);
+    REQUIRE(powerOfTwo(8) == 8);
+    REQUIRE(powerOfTwo(9) == 16);
+    REQUIRE(powerOfTwo(10) == 16);
+    REQUIRE(powerOfTwo(11) == 16);
+    REQUIRE(powerOfTwo(12) == 16);
+    REQUIRE(powerOfTwo(13) == 16);
+    REQUIRE(powerOfTwo(14) == 16);
+    REQUIRE(powerOfTwo(15) == 16);
+    REQUIRE(powerOfTwo(16) == 16);
+    REQUIRE(powerOfTwo(17) == 32);
+    REQUIRE(powerOfTwo(18) == 32);
+    REQUIRE(powerOfTwo(19) == 32);
+    REQUIRE(powerOfTwo(20) == 32);
+    REQUIRE(powerOfTwo(21) == 32);
+    REQUIRE(powerOfTwo(22) == 32);
+    REQUIRE(powerOfTwo(23) == 32);
+    REQUIRE(powerOfTwo(24) == 32);
+    REQUIRE(powerOfTwo(25) == 32);
+    REQUIRE(powerOfTwo(26) == 32);
+    REQUIRE(powerOfTwo(27) == 32);
+    REQUIRE(powerOfTwo(28) == 32);
+    REQUIRE(powerOfTwo(29) == 32);
+    REQUIRE(powerOfTwo(30) == 32);
+    REQUIRE(powerOfTwo(31) == 32);
+    REQUIRE(powerOfTwo(32) == 32);
+    REQUIRE(powerOfTwo(33) == 64);
+    REQUIRE(powerOfTwo(34) == 64);
+    REQUIRE(powerOfTwo(35) == 64);
+    REQUIRE(powerOfTwo(36) == 64);
+    REQUIRE(powerOfTwo(37) == 64);
+    REQUIRE(powerOfTwo(38) == 64);
+    REQUIRE(powerOfTwo(39) == 64);
+    REQUIRE(powerOfTwo(41) == 64);
+    REQUIRE(powerOfTwo(42) == 64);
+    REQUIRE(powerOfTwo(43) == 64);
+    REQUIRE(powerOfTwo(44) == 64);
+    REQUIRE(powerOfTwo(45) == 64);
+    REQUIRE(powerOfTwo(46) == 64);
+    REQUIRE(powerOfTwo(47) == 64);
+    REQUIRE(powerOfTwo(48) == 64);
+    REQUIRE(powerOfTwo(49) == 64);
+    REQUIRE(powerOfTwo(50) == 64);
+    REQUIRE(powerOfTwo(51) == 64);
+    REQUIRE(powerOfTwo(52) == 64);
+    REQUIRE(powerOfTwo(53) == 64);
+    REQUIRE(powerOfTwo(54) == 64);
+    REQUIRE(powerOfTwo(55) == 64);
+    REQUIRE(powerOfTwo(56) == 64);
+    REQUIRE(powerOfTwo(57) == 64);
+    REQUIRE(powerOfTwo(58) == 64);
+    REQUIRE(powerOfTwo(59) == 64);
+    REQUIRE(powerOfTwo(60) == 64);
+    REQUIRE(powerOfTwo(61) == 64);
+    REQUIRE(powerOfTwo(62) == 64);
+    REQUIRE(powerOfTwo(63) == 64);
+    REQUIRE(powerOfTwo(64) == 64);
+    REQUIRE(powerOfTwo(65) == 128);
+
+    REQUIRE(powerOfTwo(1000000) == 1048576);
+}
+
+TEST_CASE("MathUtils tests fastSqrtInt")
+{
+    for (int f = 0; f < 1005; f ++)
+        REQUIRE(fastSqrtInt(f) == static_cast<int>(sqrt(f)));
+}
-- 
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