OSC stubs

tests/RenderCadenceCompositorAppConfigProviderTests.cpp

@@ -115,6 +115,27 @@ void TestCommandLineOverrides()
 	Expect(config.http.preferredPort == 8282, "port CLI override applies");
 }
 
+void TestOscPortZeroIsAllowed()
+{
+	using namespace RenderCadenceCompositor;
+
+	const std::filesystem::path path = std::filesystem::temp_directory_path() / "render-cadence-compositor-config-osc-disabled-test.json";
+	std::ofstream output(path, std::ios::binary);
+	output << "{ \"oscPort\": 0 }\n";
+	output.close();
+
+	std::string error;
+	AppConfigProvider provider;
+	Expect(provider.Load(path, error), "provider accepts oscPort zero");
+	Expect(provider.Config().oscPort == 0, "provider loads oscPort zero");
+
+	AppConfig parsed;
+	Expect(ParseAppConfigJson("{\"oscPort\":0}", parsed, error), "config JSON parser accepts oscPort zero");
+	Expect(parsed.oscPort == 0, "config JSON parser loads oscPort zero");
+
+	std::filesystem::remove(path);
+}
+
 void TestPreviewDefaultsAreOptIn()
 {
 	using namespace RenderCadenceCompositor;
@@ -216,6 +237,7 @@ int main()
 {
 	TestLoadsRuntimeHostConfig();
 	TestCommandLineOverrides();
+	TestOscPortZeroIsAllowed();
 	TestPreviewDefaultsAreOptIn();
 	TestConfigJsonRoundTrip();
 	TestOutputAlphaNormalizesLegacyKeying();