fix: trigger change on solid color change (#11399) b5a73917b1

Co-authored-by: hernan <hernan@rive.app>

tests/unit_tests/runtime/render_test.cpp

@@ -0,0 +1,37 @@
+#include "rive/file.hpp"
+#include "rive/animation/state_machine_instance.hpp"
+#include "rive/viewmodel/viewmodel.hpp"
+#include "utils/serializing_factory.hpp"
+#include "rive_file_reader.hpp"
+#include "utils/no_op_renderer.hpp"
+#include <catch.hpp>
+#include <cstdio>
+#include <cstring>
+
+using namespace rive;
+
+TEST_CASE("file with only solid color animating triggers change on artboard",
+          "[silver]")
+{
+    auto file = ReadRiveFile("assets/solid_affects_has_changed.riv");
+
+    auto artboard = file->artboardDefault();
+    NoOpRenderer renderer;
+
+    REQUIRE(artboard != nullptr);
+    auto stateMachine = artboard->stateMachineAt(0);
+
+    auto vmi = file->createViewModelInstance(artboard.get());
+
+    stateMachine->bindViewModelInstance(vmi);
+    stateMachine->advanceAndApply(0.1f);
+    artboard->draw(&renderer);
+
+    int frames = 10;
+    for (int i = 0; i < frames; i++)
+    {
+        stateMachine->advanceAndApply(0.1f);
+        REQUIRE(artboard->didChange() == true);
+        artboard->draw(&renderer);
+    }
+}