[core] - add unit test for wrap (#6289)

* [core] - add unit test for wrap

* use double instead of integer

wrap.cpp

@@ -0,0 +1,26 @@
+#include <mbgl/test/util.hpp>
+
+#include <mbgl/util/constants.hpp>
+#include <mbgl/math/wrap.hpp>
+
+using namespace mbgl;
+
+TEST(Math, WrapHigherValue) {
+    ASSERT_DOUBLE_EQ(4.0, util::wrap(16.0, 0.0, 12.0));
+}
+
+TEST(Math, WrapLowerValue) {
+    ASSERT_DOUBLE_EQ(9.0, util::wrap(-3.0, 0.0, 12.0));
+}
+
+TEST(Math, WrapInRangeValue) {
+    ASSERT_DOUBLE_EQ(4.0, util::wrap(4.0, 0.0, 12.0));
+}
+
+TEST(Math, WrapMaxValue) {
+    ASSERT_DOUBLE_EQ(0.0, util::wrap(12.0, 0.0, 12.0));
+}
+
+TEST(Math, WrapMinValue) {
+    ASSERT_DOUBLE_EQ(0.0, util::wrap(0.0, 0.0, 12.0));
+}