Add IsPowerOfTwo and RoundUp tests.

util_test/math_base.cpp

@@ -0,0 +1,58 @@
+#include <util/math_base.h>
+#include <math.h>
+
+#define TEST_SUITE math_base
+
+using namespace util;
+
+TEST(IsPowerOfTwo)
+{
+  CHECK(!IsPowerOfTwo(-1));
+  CHECK(!IsPowerOfTwo(-0));
+  CHECK(!IsPowerOfTwo(0));
+
+  CHECK(IsPowerOfTwo(1));
+  CHECK(IsPowerOfTwo(2));
+  CHECK(!IsPowerOfTwo(3));
+  CHECK(IsPowerOfTwo(4));
+  CHECK(!IsPowerOfTwo(5));
+  CHECK(!IsPowerOfTwo(6));
+  CHECK(!IsPowerOfTwo(7));
+  CHECK(IsPowerOfTwo(8));
+  CHECK(!IsPowerOfTwo(9));
+}
+
+TEST(RoundUp)
+{
+  CHECK(RoundUp(0, 2) == 0);
+  CHECK(RoundUp(1, 2) == 2);
+  CHECK(RoundUp(3, 2) == 4);
+  CHECK(RoundUp(4, 2) == 4);
+  CHECK(RoundUp(5, 2) == 6);
+  CHECK(RoundUp(6, 2) == 6);
+  CHECK(RoundUp(7, 2) == 8);
+  CHECK(RoundUp(8, 2) == 8);
+  CHECK(RoundUp(9, 2) == 10);
+  CHECK(RoundUp(10, 2) == 10);
+
+  CHECK(RoundUp(0, 8) == 0);
+  CHECK(RoundUp(1, 8) == 8);
+  CHECK(RoundUp(3, 8) == 8);
+  CHECK(RoundUp(4, 8) == 8);
+  CHECK(RoundUp(5, 8) == 8);
+  CHECK(RoundUp(6, 8) == 8);
+  CHECK(RoundUp(7, 8) == 8);
+  CHECK(RoundUp(8, 8) == 8);
+  CHECK(RoundUp(9, 8) == 16);
+  CHECK(RoundUp(10, 8) == 16);
+
+  for (unsigned int n = 0; n < 10; ++n)
+  {
+    for (unsigned int alignOffset = 1; alignOffset < 10; ++alignOffset)
+    {
+      unsigned int align = 1 << alignOffset;
+      int expected = ceil((static_cast<float>(n) / align)) * align;
+      CHECK(RoundUp(n, align) == expected);
+    }
+  }
+}

util_test/util_test.vcproj

@@ -173,6 +173,10 @@
 				RelativePath=".\foreach.cpp"
 				>
 			</File>
+			<File
+				RelativePath=".\math_base.cpp"
+				>
+			</File>
 		</Filter>
 		<Filter
 			Name="base"