More http post end points filled

tests/RenderCadenceCompositorHttpControlServerTests.cpp

@@ -106,6 +106,39 @@ void TestKnownPostEndpointReturnsActionError()
 	Expect(response.body.find("not implemented") != std::string::npos, "unimplemented post reports diagnostic");
 }
 
+void TestLayerPostEndpointsUseCallbacks()
+{
+	using namespace RenderCadenceCompositor;
+
+	HttpControlServer server;
+	HttpControlServerCallbacks callbacks;
+	callbacks.addLayer = [](const std::string& body) {
+		Expect(body.find("solid") != std::string::npos, "add callback receives request body");
+		return ControlActionResult{ true, std::string() };
+	};
+	callbacks.removeLayer = [](const std::string& body) {
+		Expect(body.find("runtime-layer-1") != std::string::npos, "remove callback receives request body");
+		return ControlActionResult{ false, "Unknown layer id." };
+	};
+	server.SetCallbacksForTest(callbacks);
+
+	HttpControlServer::HttpRequest addRequest;
+	addRequest.method = "POST";
+	addRequest.path = "/api/layers/add";
+	addRequest.body = "{\"shaderId\":\"solid\"}";
+	const HttpControlServer::HttpResponse addResponse = server.RouteRequestForTest(addRequest);
+	ExpectEquals(addResponse.status, "200 OK", "add layer callback success returns 200");
+	Expect(addResponse.body.find("\"ok\":true") != std::string::npos, "add layer callback returns action success");
+
+	HttpControlServer::HttpRequest removeRequest;
+	removeRequest.method = "POST";
+	removeRequest.path = "/api/layers/remove";
+	removeRequest.body = "{\"layerId\":\"runtime-layer-1\"}";
+	const HttpControlServer::HttpResponse removeResponse = server.RouteRequestForTest(removeRequest);
+	ExpectEquals(removeResponse.status, "400 Bad Request", "remove layer callback failure returns 400");
+	Expect(removeResponse.body.find("Unknown layer id.") != std::string::npos, "remove layer callback returns diagnostic");
+}
+
 void TestUnknownEndpointReturns404()
 {
 	using namespace RenderCadenceCompositor;
@@ -126,6 +159,7 @@ int main()
 	TestStateEndpointUsesCallback();
 	TestRootServesUiIndex();
 	TestKnownPostEndpointReturnsActionError();
+	TestLayerPostEndpointsUseCallbacks();
 	TestUnknownEndpointReturns404();
 
 	if (gFailures != 0)