Add a CHECK for the cases when null service is accessed unconditionally.

PiperOrigin-RevId: 513956583

mediapipe/framework/graph_service.h

@@ -107,7 +107,10 @@ template <typename T>
 class ServiceBinding {
  public:
   bool IsAvailable() { return service_ != nullptr; }
-  T& GetObject() { return *service_; }
+  T& GetObject() {
+    CHECK(service_) << "Service is unavailable.";
+    return *service_;
+  }
 
   ServiceBinding() {}
   explicit ServiceBinding(std::shared_ptr<T> service) : service_(service) {}

mediapipe/framework/graph_service_test.cc

@@ -343,5 +343,19 @@ TEST(DisallowDefaultInitializationGraphServiceTest,
                        HasSubstr("was not provided and cannot be created")));
 }
 
+TEST(ServiceBindingTest, CrashesWhenGettingNullServiceObject) {
+  ASSERT_DEATH(
+      {
+        ServiceBinding<TestServiceData> binding(nullptr);
+        (void)binding.GetObject();
+      },
+      testing::ContainsRegex("Check failed: [a-z_]* Service is unavailable"));
+}
+
+TEST(ServiceBindingTest, IsAvailableReturnsFalsOnNullServiceObject) {
+  ServiceBinding<TestServiceData> binding(nullptr);
+  EXPECT_FALSE(binding.IsAvailable());
+}
+
 }  // namespace
 }  // namespace mediapipe