1 files changed, 25 insertions, 0 deletions
diff --git a/source/blender/blenlib/tests/BLI_function_ref_test.cc b/source/blender/blenlib/tests/BLI_function_ref_test.cc
index cdcbccc72e8..74f5014142c 100644
--- a/source/blender/blenlib/tests/BLI_function_ref_test.cc
+++ b/source/blender/blenlib/tests/BLI_function_ref_test.cc
@@ -99,4 +99,29 @@ TEST(function_ref, ReferenceAnotherFunctionRef)
   EXPECT_EQ(y(), 2);
 }
 
+TEST(function_ref, CallSafe)
+{
+  FunctionRef<int()> f;
+  EXPECT_FALSE(f.call_safe().has_value());
+  auto func = []() { return 10; };
+  f = func;
+  EXPECT_TRUE(f.call_safe().has_value());
+  EXPECT_EQ(*f.call_safe(), 10);
+  f = {};
+  EXPECT_FALSE(f.call_safe().has_value());
+  BLI_STATIC_ASSERT((std::is_same_v<decltype(f.call_safe()), std::optional<int>>), "");
+}
+
+TEST(function_ref, CallSafeVoid)
+{
+  FunctionRef<void()> f;
+  BLI_STATIC_ASSERT((std::is_same_v<decltype(f.call_safe()), void>), "");
+  f.call_safe();
+  int value = 0;
+  auto func = [&]() { value++; };
+  f = func;
+  f.call_safe();
+  EXPECT_EQ(value, 1);
+}
+
 }  // namespace blender::tests