Move abs+round checks to test/device/test_sw

Author: mcspr

libraries/esp8266/examples/math/math.ino

@@ -0,0 +1,82 @@
+/*
+  Small math example, checking whether we properly integrate with c++ math
+  - https://github.com/esp8266/Arduino/issues/5530
+  - https://github.com/espressif/arduino-esp32/pull/2738
+
+  Released to public domain
+*/
+
+#include <BSTest.h>
+#include <type_traits>
+
+BS_ENV_DECLARE();
+
+void setup()
+{
+    Serial.begin(115200);
+    BS_RUN(Serial);
+}
+
+bool pretest()
+{
+    return true;
+}
+
+#define TEST_MATH_IS_SAME(OP1, OP2) \
+    std::is_same<decltype(OP1), decltype(OP2)>::value
+
+TEST_CASE("std::abs and abs result is the same", "[arduino-math]")
+{
+    CHECK(TEST_MATH_IS_SAME(abs(-5), std::abs(-5)));
+    CHECK(TEST_MATH_IS_SAME(abs(-25.0), std::abs(-25.0)));
+    CHECK(TEST_MATH_IS_SAME(abs(10.0), std::abs(10.0)));
+    CHECK(! TEST_MATH_IS_SAME(abs(10.0), std::abs(10)));
+    CHECK(! TEST_MATH_IS_SAME(abs(-5), std::abs(10.0)));
+}
+
+TEST_CASE("abs works with ints", "[arduino-math]")
+{
+    int a = -3;
+    int b = 3;
+    CHECK(TEST_MATH_IS_SAME(abs(a), a));
+    CHECK(TEST_MATH_IS_SAME(abs(b), b));
+    CHECK(abs(a) == b);
+    CHECK(abs(b) == b);
+}
+
+bool compare_floats(float a, float b) {
+    return std::fabs(a - b) < std::numeric_limits<float>::epsilon();
+}
+
+TEST_CASE("abs works with floats", "[arduino-math]")
+{
+    float a = -3.5;
+    float b = 3.5;
+    CHECK(TEST_MATH_IS_SAME(abs(a), a));
+    CHECK(TEST_MATH_IS_SAME(abs(b), b));
+    CHECK(compare_floats(abs(a), b));
+    CHECK(compare_floats(abs(b), b));
+}
+
+TEST_CASE("round works with floats", "[arduino-math]")
+{
+    float a = 2.9;
+    float b = 3.0;
+    CHECK(TEST_MATH_IS_SAME(round(a), a));
+    CHECK(TEST_MATH_IS_SAME(round(b), b));
+    CHECK(compare_floats(round(a), b));
+    CHECK(compare_floats(round(b), b));
+}
+
+TEST_CASE("round result is float", "[arduino-math]")
+{
+    float a = 2.9;
+    float b = 3.0;
+    CHECK(TEST_MATH_IS_SAME(round(a), a));
+    CHECK(TEST_MATH_IS_SAME(round(b), b));
+    CHECK(compare_floats(round(a), b));
+    CHECK(compare_floats(round(b), b));
+}
+
+void loop(){}
+