Test for explict overflow

1 files changed, 7 insertions, 0 deletions

diff --git a/tests/test_fixed_point.cpp b/tests/test_fixed_point.cpp
index 8cb12d2..b3d3e78 100644
--- a/tests/test_fixed_point.cpp
+++ b/tests/test_fixed_point.cpp
@@ -7,3 +7,10 @@ TEST_CASE("fp_t addition is commutative") {
     CHECK(a + b == b + a);
     REQUIRE(a.raw != 0);
 }
+
+TEST_CASE("fp_t addition overflows") {
+    fp_t a = fp_t::from_raw(INT32_MAX);
+    fp_t b = fp_t::from_raw(1);
+    fp_t c = fp_t::from_raw(INT32_MIN);
+    CHECK(a + b == c);
+}