added test to create ConsumingFanOut with triggered device

tests/executables_src/testFanoutConnections.cc

+#define BOOST_TEST_MODULE testFanoutConnections
+
+#include <boost/mpl/list.hpp>
+#include <boost/test/included/unit_test.hpp>
+
+#include "Application.h"
+#include "ApplicationModule.h"
+#include "ScalarAccessor.h"
+#include "TestFacility.h"
+#include <ChimeraTK/ExceptionDummyBackend.h>
+
+namespace ctk = ChimeraTK;
+
+struct TestModule1 : ctk::ApplicationModule {
+  using ctk::ApplicationModule::ApplicationModule;
+  ctk::ScalarPushInput<int> moduleTrigger{this, "moduleTrigger", "", ""};
+
+  ctk::ScalarPollInput<int> i3{this, "i3", "", ""};
+
+  ctk::ScalarOutput<int> moduleOutput{this, "moduleOutput", "", ""};
+
+  void mainLoop() override {
+    while(true) {
+      moduleTrigger.read();
+
+      i3.readLatest();
+
+      moduleOutput = int(i3);
+
+      writeAll();
+    }
+  }
+};
+
+struct TestApplication1 : ctk::Application {
+  TestApplication1() : Application("testApp") {}
+  ~TestApplication1() { shutdown(); }
+
+  void defineConnections() {
+    findTag(".*").connectTo(cs);
+    device.connectTo(cs, cs("deviceTrigger", typeid(int), 1));
+  }
+  constexpr static char const* dummyCDD1 = "(dummy?map=testDataValidity1.map)";
+
+  TestModule1 m1{this, "m1", ""};
+  ctk::DeviceModule device{this, dummyCDD1};
+
+  ctk::ControlSystemModule cs;
+};
+
+BOOST_AUTO_TEST_CASE(testConnectConsumingFanout) {
+  TestApplication1 theApp;
+  ctk::TestFacility testFacility;
+  ChimeraTK::Device dummy(TestApplication1::dummyCDD1);
+
+  // write iniial values to the dummy before starting the application
+  dummy.open();
+  dummy.write("m1/i1/DUMMY_WRITEABLE", 12);
+  dummy.write("m1/i3/DUMMY_WRITEABLE", 32);
+
+  testFacility.runApplication();
+
+  BOOST_CHECK_EQUAL(testFacility.readScalar<int>("m1/i1"), 12);
+  BOOST_CHECK_EQUAL(testFacility.readScalar<int>("m1/i3"), 32);
+
+  // check that the trigger only affects i1
+  dummy.write("m1/i1/DUMMY_WRITEABLE", 13);
+  dummy.write("m1/i3/DUMMY_WRITEABLE", 33);
+
+  testFacility.writeScalar<int>("deviceTrigger", 1);
+  testFacility.stepApplication();
+
+  BOOST_CHECK_EQUAL(testFacility.readScalar<int>("m1/i1"), 13);
+  BOOST_CHECK_EQUAL(testFacility.readScalar<int>("m1/i3"), 32);
+
+  // check that the module trigger updates i3
+  BOOST_CHECK_EQUAL(testFacility.readScalar<int>("m1/moduleOutput"), 0);
+
+  dummy.write("m1/i1/DUMMY_WRITEABLE", 14);
+  dummy.write("m1/i3/DUMMY_WRITEABLE", 34);
+
+  testFacility.writeScalar<int>("m1/moduleTrigger", 1);
+  testFacility.stepApplication();
+
+  BOOST_CHECK_EQUAL(testFacility.readScalar<int>("m1/i1"), 13);
+  BOOST_CHECK_EQUAL(testFacility.readScalar<int>("m1/i3"), 34);
+  BOOST_CHECK_EQUAL(testFacility.readScalar<int>("m1/moduleOutput"), 34);
+}