From 6be430c7f7dbff362a0082242c710a42067b3d67 Mon Sep 17 00:00:00 2001
From: Pierre Wendling <[EMAIL REDACTED]>
Date: Mon, 16 May 2022 20:54:59 -0400
Subject: [PATCH] Test: Add Tan tests to math suite.
---
test/testautomation_math.c | 93 ++++++++++++++++++++++++++++++++++++++
1 file changed, 93 insertions(+)
diff --git a/test/testautomation_math.c b/test/testautomation_math.c
index ccb35194f12..33cb2816485 100644
--- a/test/testautomation_math.c
+++ b/test/testautomation_math.c
@@ -1957,6 +1957,78 @@ sin_rangeTest(void *args)
return TEST_COMPLETED;
}
+/* SDL_tan tests functions */
+
+/**
+ * \brief Checks positive and negative infinity.
+ */
+static int
+tan_infCases(void *args)
+{
+ double result;
+
+ result = SDL_tan(INFINITY);
+ SDLTest_AssertCheck(isnan(result),
+ "Tan(%f), expected %f, got %f",
+ INFINITY, NAN, result);
+
+ result = SDL_tan(-INFINITY);
+ SDLTest_AssertCheck(isnan(result),
+ "Tan(%f), expected %f, got %f",
+ -INFINITY, NAN, result);
+
+ return TEST_COMPLETED;
+}
+
+/**
+ * \brief Checks for nan.
+ */
+static int
+tan_nanCase(void *args)
+{
+ const double result = SDL_tan(NAN);
+ SDLTest_AssertCheck(isnan(result),
+ "Tan(%f), expected %f, got %f",
+ NAN, NAN, result);
+ return TEST_COMPLETED;
+}
+
+/**
+ * \brief Checks positive and negative zero.
+ */
+static int
+tan_zeroCases(void *args)
+{
+ const d_to_d regular_cases[] = {
+ { -0.0, -0.0 },
+ { 0.0, 0.0 }
+ };
+ return helper_dtod("Tan", SDL_tan, regular_cases, SDL_arraysize(regular_cases));
+}
+
+/**
+ * \brief Checks tangent precision for the first 10 decimals.
+ */
+static int
+tan_precisionTest(void *args)
+{
+ Uint32 i;
+ Uint32 iterations = 10;
+ double angle = 0.0;
+ double step = 2.0 * M_PI / iterations;
+ const double expected[] = {
+ 0.0, 7265425280.0, 30776835371.0, -30776835371.0, -7265425280.0,
+ -0.0, 7265425280.0, 30776835371.0, -30776835371.0, -7265425280.0
+ };
+ for (i = 0; i < iterations; i++, angle += step) {
+ double result = SDL_tan(angle) * 1.0E10;
+ SDLTest_AssertCheck(SDL_trunc(result) == expected[i],
+ "Tan(%f), expected %f, got %f",
+ angle, expected[i], result);
+ }
+ return TEST_COMPLETED;
+}
+
/* ================= Test References ================== */
/* SDL_floor test cases */
@@ -2356,6 +2428,25 @@ static const SDLTest_TestCaseReference sinTestRange = {
"Check a range of positive integer", TEST_ENABLED
};
+/* SDL_tan test cases */
+
+static const SDLTest_TestCaseReference tanTestInf = {
+ (SDLTest_TestCaseFp) tan_infCases, "tan_infCases",
+ "Check for positive and negative infinity", TEST_ENABLED
+};
+static const SDLTest_TestCaseReference tanTestNan = {
+ (SDLTest_TestCaseFp) tan_nanCase, "tan_nanCase",
+ "Check the NaN special case", TEST_ENABLED
+};
+static const SDLTest_TestCaseReference tanTestZero = {
+ (SDLTest_TestCaseFp) tan_zeroCases, "tan_zeroCases",
+ "Check a set of regular cases", TEST_ENABLED
+};
+static const SDLTest_TestCaseReference tanTestPrecision = {
+ (SDLTest_TestCaseFp) tan_precisionTest, "tan_precisionTest",
+ "Check tane precision to the tenth decimal", TEST_ENABLED
+};
+
static const SDLTest_TestCaseReference *mathTests[] = {
&floorTestInf, &floorTestZero, &floorTestNan,
&floorTestRound, &floorTestFraction, &floorTestRange,
@@ -2403,6 +2494,8 @@ static const SDLTest_TestCaseReference *mathTests[] = {
&sinTestInf, &sinTestNan, &sinTestRegular,
&sinTestPrecision, &sinTestRange,
+ &tanTestInf, &tanTestNan, &tanTestZero, &tanTestPrecision,
+
NULL
};