From adb445eafb67cbcefc0bb88fc363c17ebfa01754 Mon Sep 17 00:00:00 2001
From: Pierre Wendling <[EMAIL REDACTED]>
Date: Mon, 16 May 2022 18:29:08 -0400
Subject: [PATCH] Test: Add Cos tests to math suite.
---
test/testautomation_math.c | 134 +++++++++++++++++++++++++++++++++++++
1 file changed, 134 insertions(+)
diff --git a/test/testautomation_math.c b/test/testautomation_math.c
index 806534d7b32..195c23b40a2 100644
--- a/test/testautomation_math.c
+++ b/test/testautomation_math.c
@@ -1739,6 +1739,114 @@ scalbn_regularCases(void *args)
return TEST_COMPLETED;
}
+/* SDL_cos tests functions */
+
+/**
+ * \brief Checks positive and negative infinity.
+ */
+static int
+cos_infCases(void *args)
+{
+ double result;
+
+ result = SDL_cos(INFINITY);
+ SDLTest_AssertCheck(isnan(result),
+ "Cos(%f), expected %f, got %f",
+ INFINITY, NAN, result);
+
+ result = SDL_cos(-INFINITY);
+ SDLTest_AssertCheck(isnan(result),
+ "Cos(%f), expected %f, got %f",
+ -INFINITY, NAN, result);
+
+ return TEST_COMPLETED;
+}
+
+/**
+ * \brief Checks for nan.
+ */
+static int
+cos_nanCase(void *args)
+{
+ const double result = SDL_cos(NAN);
+ SDLTest_AssertCheck(isnan(result),
+ "Cos(%f), expected %f, got %f",
+ NAN, NAN, result);
+ return TEST_COMPLETED;
+}
+
+/**
+ * \brief Checks a set of regular values.
+ */
+static int
+cos_regularCases(void *args)
+{
+ const d_to_d regular_cases[] = {
+ { -M_PI, -1.0 },
+ { -0.0, 1.0 },
+ { 0.0, 1.0 },
+ { M_PI, -1.0 }
+ };
+ return helper_dtod("Cos", SDL_cos, regular_cases, SDL_arraysize(regular_cases));
+}
+
+/**
+ * \brief Checks cosine precision for the first 10 decimals.
+ */
+static int
+cos_precisionTest(void *args)
+{
+ Uint32 i;
+ Uint32 iterations = 20;
+ double angle = 0.0;
+ double step = 2.0 * M_PI / iterations;
+ const Sint64 expected[] = {
+ 10000000000, 9510565162, 8090169943, 5877852522, 3090169943,
+ 0, -3090169943, -5877852522, -8090169943, -9510565162,
+ -10000000000, -9510565162, -8090169943, -5877852522, -3090169943,
+ 0, 3090169943, 5877852522, 8090169943, 9510565162
+ };
+ for (i = 0; i < iterations; i++, angle += step) {
+ Sint64 result = (Sint64) (SDL_cos(angle) * 10000000000);
+ SDLTest_AssertCheck(result == expected[i],
+ "Cos(%f), expected %lld, got %lld",
+ angle, expected[i], result);
+ }
+ return TEST_COMPLETED;
+}
+
+/**
+ * \brief Checks a range of values between 0 and UINT32_MAX.
+ */
+static int
+cos_rangeTest(void *args)
+{
+ Uint32 i;
+ double test_value = 0.0;
+
+ SDLTest_AssertPass("Cos: Testing a range of %u values with steps of %u",
+ RANGE_TEST_ITERATIONS,
+ RANGE_TEST_STEP);
+
+ for (i = 0; i < RANGE_TEST_ITERATIONS; i++, test_value += RANGE_TEST_STEP) {
+ double result;
+ /* These are tested elsewhere */
+ if (isnan(test_value) || isinf(test_value)) {
+ continue;
+ }
+
+ /* Only log failures to save performances */
+ result = SDL_cos(test_value);
+ if (result < -1.0 || result > 1.0) {
+ SDLTest_AssertCheck(SDL_FALSE,
+ "Cos(%.1f), expected [%.1f,%.1f], got %.1f",
+ test_value, -1.0, 1.0, result);
+ return TEST_ABORTED;
+ }
+ }
+ return TEST_COMPLETED;
+}
+
/* ================= Test References ================== */
/* SDL_floor test cases */
@@ -2092,6 +2200,29 @@ static const SDLTest_TestCaseReference scalbnTestRegular = {
"Check a set of regular cases", TEST_ENABLED
};
+/* SDL_cos test cases */
+
+static const SDLTest_TestCaseReference cosTestInf = {
+ (SDLTest_TestCaseFp) cos_infCases, "cos_infCases",
+ "Check for positive and negative infinity", TEST_ENABLED
+};
+static const SDLTest_TestCaseReference cosTestNan = {
+ (SDLTest_TestCaseFp) cos_nanCase, "cos_nanCase",
+ "Check the NaN special case", TEST_ENABLED
+};
+static const SDLTest_TestCaseReference cosTestRegular = {
+ (SDLTest_TestCaseFp) cos_regularCases, "cos_regularCases",
+ "Check a set of regular cases", TEST_ENABLED
+};
+static const SDLTest_TestCaseReference cosTestPrecision = {
+ (SDLTest_TestCaseFp) cos_precisionTest, "cos_precisionTest",
+ "Check cosine precision to the tenth decimal", TEST_ENABLED
+};
+static const SDLTest_TestCaseReference cosTestRange = {
+ (SDLTest_TestCaseFp) cos_rangeTest, "cos_rangeTest",
+ "Check a range of positive integer", TEST_ENABLED
+};
+
static const SDLTest_TestCaseReference *mathTests[] = {
&floorTestInf, &floorTestZero, &floorTestNan,
&floorTestRound, &floorTestFraction, &floorTestRange,
@@ -2133,6 +2264,9 @@ static const SDLTest_TestCaseReference *mathTests[] = {
&scalbnTestInf, &scalbnTestBaseZero, &scalbnTestExpZero,
&scalbnTestNan, &scalbnTestRegular,
+ &cosTestInf, &cosTestNan, &cosTestRegular,
+ &cosTestPrecision, &cosTestRange,
+
NULL
};