add unittest for copysign
git-svn-id: http://skia.googlecode.com/svn/trunk@496 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/tests/MathTest.cpp b/tests/MathTest.cpp
index 09e3748..dec93de 100644
--- a/tests/MathTest.cpp
+++ b/tests/MathTest.cpp
@@ -170,6 +170,46 @@
#endif
}
+static void test_copysign(skiatest::Reporter* reporter) {
+ static const int32_t gTriples[] = {
+ // x, y, expected result
+ 0, 0, 0,
+ 0, 1, 0,
+ 0, -1, 0,
+ 1, 0, 1,
+ 1, 1, 1,
+ 1, -1, -1,
+ -1, 0, 1,
+ -1, 1, 1,
+ -1, -1, -1,
+ };
+ for (size_t i = 0; i < SK_ARRAY_COUNT(gTriples); i += 3) {
+ REPORTER_ASSERT(reporter,
+ SkCopySign32(gTriples[i], gTriples[i+1]) == gTriples[i+2]);
+#ifdef SK_CAN_USE_FLOAT
+ float x = (float)gTriples[i];
+ float y = (float)gTriples[i+1];
+ float expected = (float)gTriples[i+2];
+ REPORTER_ASSERT(reporter, sk_float_copysign(x, y) == expected);
+#endif
+ }
+
+ SkRandom rand;
+ for (int j = 0; j < 1000; j++) {
+ int ix = rand.nextS();
+ REPORTER_ASSERT(reporter, SkCopySign32(ix, ix) == ix);
+ REPORTER_ASSERT(reporter, SkCopySign32(ix, -ix) == -ix);
+ REPORTER_ASSERT(reporter, SkCopySign32(-ix, ix) == ix);
+ REPORTER_ASSERT(reporter, SkCopySign32(-ix, -ix) == -ix);
+
+ SkScalar sx = rand.nextSScalar1();
+ REPORTER_ASSERT(reporter, SkScalarCopySign(sx, sx) == sx);
+ REPORTER_ASSERT(reporter, SkScalarCopySign(sx, -sx) == -sx);
+ REPORTER_ASSERT(reporter, SkScalarCopySign(-sx, sx) == sx);
+ REPORTER_ASSERT(reporter, SkScalarCopySign(-sx, -sx) == -sx);
+ }
+}
+
static void TestMath(skiatest::Reporter* reporter) {
int i;
int32_t x;
@@ -196,6 +236,7 @@
#endif
test_muldiv255(reporter);
+ test_copysign(reporter);
{
SkScalar x = SK_ScalarNaN;