add unit tests for the powerd monitor

2 files changed, 71 insertions, 2 deletions

diff --git a/include/datetime/clock-mock.h b/include/datetime/clock-mock.h
index fb9b52f..0e24377 100644
--- a/include/datetime/clock-mock.h
+++ b/include/datetime/clock-mock.h
@@ -41,15 +41,23 @@ public:
 
     DateTime localtime() const { return m_localtime; }
 
-    void set_localtime(const DateTime& dt) {
+    void set_localtime(const DateTime& dt)
+    {
         const auto old = m_localtime;
-        m_localtime = dt;
+
+        set_localtime_quietly(dt);
+
         if (!DateTime::is_same_minute(old, m_localtime))
             minute_changed();
         if (!DateTime::is_same_day(old, m_localtime))
             date_changed();
     }
 
+    void set_localtime_quietly(const DateTime& dt)
+    {
+        m_localtime = dt;
+    }
+
 private:
     DateTime m_localtime;
 };
diff --git a/tests/test-clock.cpp b/tests/test-clock.cpp
index 82f8cb0..62281fb 100644
--- a/tests/test-clock.cpp
+++ b/tests/test-clock.cpp
@@ -18,8 +18,11 @@
  */
 
 #include <datetime/clock.h>
+#include <datetime/clock-mock.h>
 #include <datetime/timezones.h>
 
+#include <notifications/dbus-shared.h>
+
 #include "test-dbus-fixture.h"
 
 /***
@@ -152,3 +155,61 @@ TEST_F(ClockFixture, SleepTriggersSkew)
 
     g_bus_unown_name(name_tag);
 }
+
+namespace
+{
+  void on_powerd_name_acquired(GDBusConnection * /*connection*/,
+                               const gchar     * /*name*/,
+                               gpointer          is_owned)
+  {
+    *static_cast<bool*>(is_owned) = true;
+  }
+}
+
+/**
+ * Confirm that powerd's SysPowerStateChange triggers
+ * a timestamp change
+ */
+TEST_F(ClockFixture, SysPowerStateChange)
+{
+  // set up the mock clock
+  bool minute_changed = false;
+  auto clock = std::make_shared<MockClock>(DateTime::NowLocal());
+  clock->minute_changed.connect([&minute_changed]() {
+    minute_changed = true;
+  });
+  
+  // control test -- minute_changed shouldn't get triggered
+  // when the clock is silently changed
+  gboolean is_owned = false;
+  auto tag = g_bus_own_name_on_connection(system_bus,
+                                          BUS_POWERD_NAME,
+                                          G_BUS_NAME_OWNER_FLAGS_NONE,
+                                          on_powerd_name_acquired,
+                                          nullptr,
+                                          &is_owned /* user_data */,
+                                          nullptr /* user_data closure */);
+  const DateTime not_now {DateTime::Local(1999, 12, 31, 23, 59, 59)};
+  clock->set_localtime_quietly(not_now);
+  wait_msec();
+  ASSERT_TRUE(is_owned);
+  ASSERT_FALSE(minute_changed);
+
+  // now for the actual test,
+  // confirm that SysPowerStateChange triggers a minute_changed() signal
+  GError * error = nullptr;
+  auto emitted = g_dbus_connection_emit_signal(system_bus,
+                                               nullptr,
+                                               BUS_POWERD_PATH,
+                                               BUS_POWERD_INTERFACE,
+                                               "SysPowerStateChange",
+                                               g_variant_new("(i)", 1),
+                                               &error);
+  wait_msec();
+  EXPECT_TRUE(emitted);
+  EXPECT_EQ(nullptr, error);
+  EXPECT_TRUE(minute_changed);
+
+  // cleanup
+  g_bus_unown_name(tag);
+}