math: add unit tests to check that radians(90) == radians(90.0).

src/t/math/trig.cpp

@@ -1,5 +1,5 @@
 //
-//  Lol Engine — Unit tests
+//  Lol Engine — Unit tests for trigonometric functions
 //
 //  Copyright © 2010—2015 Sam Hocevar <sam@hocevar.net>
 //
@@ -36,6 +36,31 @@ lolunit_declare_fixture(trig_test)
         lolunit_assert_doubles_equal(90.0f, degrees(F_PI_2), 1e-5f);
     }
 
+    lolunit_declare_test(integer_angle_conversions)
+    {
+        lolunit_assert_doubles_equal(radians(90), radians(90.0), 1e-5);
+
+        lolunit_assert_doubles_equal(radians((uint8_t)90),  radians(90.0), 1e-5);
+        lolunit_assert_doubles_equal(radians((int8_t)90),   radians(90.0), 1e-5);
+        lolunit_assert_doubles_equal(radians((uint16_t)90), radians(90.0), 1e-5);
+        lolunit_assert_doubles_equal(radians((int16_t)90),  radians(90.0), 1e-5);
+        lolunit_assert_doubles_equal(radians((uint32_t)90), radians(90.0), 1e-5);
+        lolunit_assert_doubles_equal(radians((int32_t)90),  radians(90.0), 1e-5);
+        lolunit_assert_doubles_equal(radians((uint64_t)90), radians(90.0), 1e-5);
+        lolunit_assert_doubles_equal(radians((int64_t)90),  radians(90.0), 1e-5);
+
+        lolunit_assert_doubles_equal(degrees(1), degrees(1.0), 1e-5);
+
+        lolunit_assert_doubles_equal(degrees((uint8_t)1),  degrees(1.0), 1e-5);
+        lolunit_assert_doubles_equal(degrees((int8_t)1),   degrees(1.0), 1e-5);
+        lolunit_assert_doubles_equal(degrees((uint16_t)1), degrees(1.0), 1e-5);
+        lolunit_assert_doubles_equal(degrees((int16_t)1),  degrees(1.0), 1e-5);
+        lolunit_assert_doubles_equal(degrees((uint32_t)1), degrees(1.0), 1e-5);
+        lolunit_assert_doubles_equal(degrees((int32_t)1),  degrees(1.0), 1e-5);
+        lolunit_assert_doubles_equal(degrees((uint64_t)1), degrees(1.0), 1e-5);
+        lolunit_assert_doubles_equal(degrees((int64_t)1),  degrees(1.0), 1e-5);
+    }
+
     lolunit_declare_test(sin)
     {
         using std::fabs;