[traffic] Introduce test mode for traffic manager

Signed-off-by: mvglasow <michael -at- vonglasow.com>

map/framework.cpp

@@ -374,6 +374,8 @@ Framework::Framework(FrameworkParams const & params, bool loadMaps)
   editor.SetDelegate(make_unique<search::EditorDelegate>(m_featuresFetcher.GetDataSource()));
   editor.SetInvalidateFn([this](){ InvalidateRect(GetCurrentViewport()); });
 
+  if (params.m_trafficTestMode)
+    m_trafficManager.SetTestMode();
   m_trafficManager.SetCurrentDataVersion(m_storage.GetCurrentDataVersion());
   m_trafficManager.SetSimplifiedColorScheme(LoadTrafficSimplifiedColors());
 

map/framework.hpp

@@ -98,11 +98,22 @@ class Loader;
 /// build version for screenshots.
 //#define FIXED_LOCATION
 
+/**
+ * @brief Initialization parameters for the framework.
+ *
+ * `FrameworkParams` is intended for parameters which are hardcoded rather than read from a
+ * configuration. It allows test cases to run on a tailored configuration.
+ */
 struct FrameworkParams
 {
   bool m_enableDiffs = true;
   size_t m_numSearchAPIThreads = 1;
 
+  /**
+   * @brief Whether the traffic manager should start in test mode.
+   */
+  bool m_trafficTestMode = false;
+
   FrameworkParams() = default;
   FrameworkParams(bool enableDiffs)
     : m_enableDiffs(enableDiffs)

map/traffic_manager.cpp

@@ -126,7 +126,10 @@ void TrafficManager::SetEnabled(bool enabled)
   m_drapeEngine.SafeCall(&df::DrapeEngine::EnableTraffic, enabled);
 
   if (enabled)
+  {
     Invalidate();
+    m_canSetMode = false;
+  }
   else
     m_observer.OnTrafficInfoClear();
 }
@@ -477,6 +480,8 @@ void TrafficManager::ThreadRoutine()
 
     // TODO clean out expired messages
 
+    if (!IsTestMode())
+    {
       LOG(LINFO, ("start loop, active MWMs changed:", m_activeMwmsChanged, ", poll needed:", m_isPollNeeded));
 
       // this is a no-op if active MWMs have not changed
@@ -500,6 +505,7 @@ void TrafficManager::ThreadRoutine()
           // TODO set failed status somewhere and retry
         }
       }
+    }
     LOG(LINFO, (m_feedQueue.size(), "feed(s) in queue"));
 
     // consolidate feed queue (remove older messages in favor of newer ones)
@@ -568,6 +574,8 @@ bool TrafficManager::WaitForRequest()
       return true;
     }
 
+    if (!IsTestMode())
+    {
       // if update interval has elapsed, return immediately
       auto const currentTime = steady_clock::now();
       auto const passedSeconds = currentTime - m_lastResponseTime;
@@ -578,11 +586,12 @@ bool TrafficManager::WaitForRequest()
         return true;
       }
     }
+  }
 
   LOG(LINFO, ("nothing to do for now, waiting for timeout or notification"));
   bool const timeout = !m_condition.wait_for(lock, kUpdateInterval, [this]
   {
-    return !m_isRunning || m_activeMwmsChanged;
+    return !m_isRunning || (m_activeMwmsChanged && !IsTestMode());
   });
 
   // check again if we got terminated while waiting (or woken up because we got terminated)
@@ -593,7 +602,7 @@ bool TrafficManager::WaitForRequest()
   if (IsEnabled())
     m_isPollNeeded |= timeout;
 
-  LOG(LINFO, ("timeout:", timeout, "active MWMs changed:", m_activeMwmsChanged));
+  LOG(LINFO, ("timeout:", timeout, "active MWMs changed:", m_activeMwmsChanged, "test mode:", IsTestMode()));
   return true;
 }
 
@@ -960,6 +969,16 @@ void TrafficManager::SetSimplifiedColorScheme(bool simplified)
   m_drapeEngine.SafeCall(&df::DrapeEngine::SetSimplifiedTrafficColors, simplified);
 }
 
+void TrafficManager::SetTestMode()
+{
+  if (!m_canSetMode)
+  {
+    LOG(LWARNING, ("Mode cannot be set once the traffic manager has been enabled"));
+    return;
+  }
+  m_mode = Mode::Test;
+}
+
 std::string DebugPrint(TrafficManager::TrafficState state)
 {
   switch (state)

map/traffic_manager.hpp

@@ -62,6 +62,31 @@ public:
     ExpiredApp
   };
 
+  /**
+   * @brief The mode for the traffic manager.
+   *
+   * Future versions may introduce further test modes. Therefore, always use `TrafficManager::IsTestMode()`
+   * to verify if the traffic manager is running in test mode.
+   */
+  enum class Mode
+  {
+    /**
+     * Traffic manager mode for normal operation.
+     *
+     * This is the default mode unless something else is explicitly set.
+     */
+    Normal,
+    /**
+     * Test mode.
+     *
+     * This mode will prevent the traffic manager from automatically subscribing to sources and
+     * polling them. It will still receive and process push feeds.
+     *
+     * Future versions may introduce further behavior changes, and/or introduce more test modes.
+     */
+    Test
+  };
+
   struct MyPosition
   {
     m2::PointD m_position = m2::PointD(0.0, 0.0);
@@ -161,6 +186,24 @@ public:
   void SetSimplifiedColorScheme(bool simplified);
   bool HasSimplifiedColorScheme() const { return m_hasSimplifiedColorScheme; }
 
+  /**
+   * @brief Whether the traffic manager is operating in test mode.
+   */
+  bool IsTestMode() { return m_mode != Mode::Normal; }
+
+  /**
+   * @brief Switches the traffic manager into test mode.
+   *
+   * The mode can only be set before the traffic manager is first enabled. After that, this method
+   * will log a warning but otherwise do nothing.
+   *
+   * In test mode, the traffic manager will not subscribe to sources or poll them automatically.
+   * It will still receive and process push feeds.
+   *
+   * Future versions may introduce further behavior changes.
+   */
+  void SetTestMode();
+
 private:
   /**
    * @brief Holds information about pending or previous traffic requests pertaining to an MWM.
@@ -481,6 +524,18 @@ private:
   std::pair<MyPosition, bool> m_currentPosition = {MyPosition(), false};
   std::pair<ScreenBase, bool> m_currentModelView = {ScreenBase(), false};
 
+  /**
+   * The mode in which the traffic manager is running.
+   */
+  Mode m_mode = Mode::Normal;
+
+  /**
+   * Whether the traffic manager accepts mode changes.
+   *
+   * Mode cannt be set after the traffic manager has been enabled for the first time.
+   */
+  bool m_canSetMode = true;
+
   std::atomic<TrafficState> m_state;
   TrafficStateChangedFn m_onStateChangedFn;
 

traffxml/traff_assessment_tool/main.cpp

@@ -32,6 +32,8 @@ int main(int argc, char * argv[])
 
   FrameworkParams params;
 
+  params.m_trafficTestMode = true;
+
   Framework framework(params);
   traffxml::MainWindow mainWindow(framework);