diff options
Diffstat (limited to 'tests/MathTest.cpp')
-rw-r--r-- | tests/MathTest.cpp | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/tests/MathTest.cpp b/tests/MathTest.cpp index cb4d0b8bd2..bc8e6a32de 100644 --- a/tests/MathTest.cpp +++ b/tests/MathTest.cpp @@ -691,3 +691,74 @@ static void TestEndian(skiatest::Reporter* reporter) { } DEFINE_TESTCLASS("Endian", EndianTestClass, TestEndian) + +template <typename T> +static void test_divmod(skiatest::Reporter* r) { + const struct { + T numer; + T denom; + } kEdgeCases[] = { + {(T)17, (T)17}, + {(T)17, (T)4}, + {(T)0, (T)17}, + // For unsigned T these negatives are just some large numbers. Doesn't hurt to test them. + {(T)-17, (T)-17}, + {(T)-17, (T)4}, + {(T)17, (T)-4}, + {(T)-17, (T)-4}, + }; + + for (size_t i = 0; i < SK_ARRAY_COUNT(kEdgeCases); i++) { + const T numer = kEdgeCases[i].numer; + const T denom = kEdgeCases[i].denom; + T div, mod; + SkTDivMod(numer, denom, &div, &mod); + REPORTER_ASSERT(r, numer/denom == div); + REPORTER_ASSERT(r, numer%denom == mod); + } + + SkRandom rand; + for (size_t i = 0; i < 10000; i++) { + const T numer = (T)rand.nextS(); + T denom = 0; + while (0 == denom) { + denom = (T)rand.nextS(); + } + T div, mod; + SkTDivMod(numer, denom, &div, &mod); + REPORTER_ASSERT(r, numer/denom == div); + REPORTER_ASSERT(r, numer%denom == mod); + } +} + +DEF_TEST(divmod_u8, r) { + test_divmod<uint8_t>(r); +} + +DEF_TEST(divmod_u16, r) { + test_divmod<uint16_t>(r); +} + +DEF_TEST(divmod_u32, r) { + test_divmod<uint32_t>(r); +} + +DEF_TEST(divmod_u64, r) { + test_divmod<uint64_t>(r); +} + +DEF_TEST(divmod_s8, r) { + test_divmod<int8_t>(r); +} + +DEF_TEST(divmod_s16, r) { + test_divmod<int16_t>(r); +} + +DEF_TEST(divmod_s32, r) { + test_divmod<int32_t>(r); +} + +DEF_TEST(divmod_s64, r) { + test_divmod<int64_t>(r); +} |