add unit tests for greeter

1 files changed, 151 insertions, 0 deletions

diff --git a/tests/unit/greeter-test.cpp b/tests/unit/greeter-test.cpp
new file mode 100644
index 0000000..5d29023
--- /dev/null
+++ b/tests/unit/greeter-test.cpp
@@ -0,0 +1,151 @@
+/*
+ * Copyright 2016 Canonical Ltd.
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 3, as published
+ * by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranties of
+ * MERCHANTABILITY, SATISFACTORY QUALITY, or FITNESS FOR A PARTICULAR
+ * PURPOSE.  See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Authors:
+ *   Charles Kerr <charles.kerr@canonical.com>
+ */
+
+#include <tests/utils/qt-fixture.h>
+
+#include <src/dbus-names.h>
+#include <src/greeter.h>
+
+#include <libqtdbustest/DBusTestRunner.h>
+#include <libqtdbustest/QProcessDBusService.h>
+#include <libqtdbusmock/DBusMock.h>
+
+class GreeterFixture: public QtFixture
+{
+private:
+
+    using super = QtFixture;
+
+public:
+
+    GreeterFixture() =default;
+    ~GreeterFixture() =default;
+
+protected:
+
+    std::shared_ptr<QtDBusTest::DBusTestRunner> m_dbus_runner;
+    std::shared_ptr<QtDBusMock::DBusMock> m_dbus_mock;
+    GDBusConnection* m_session_bus;
+
+    void SetUp() override
+    {
+        super::SetUp();
+  
+        // use a fresh bus for each test
+ 
+        m_dbus_runner.reset(new QtDBusTest::DBusTestRunner());
+        m_dbus_mock.reset(new QtDBusMock::DBusMock(*m_dbus_runner.get()));
+
+        GError* error {};
+        m_session_bus = g_bus_get_sync(G_BUS_TYPE_SESSION, nullptr, &error);
+        g_assert_no_error(error);
+        g_dbus_connection_set_exit_on_close(m_session_bus, false);
+    }
+
+    void TearDown() override
+    {
+        g_clear_object(&m_session_bus);
+        m_dbus_mock.reset();
+        m_dbus_runner.reset();
+
+        super::TearDown();
+    }
+
+    void start_greeter_service(bool is_active)
+    {
+        // set a watcher to look for our mock to appear
+        bool owned {};
+        QDBusServiceWatcher watcher(
+            DBusNames::UnityGreeter::NAME,
+            m_dbus_runner->sessionConnection()
+        );
+        QObject::connect(
+            &watcher,
+            &QDBusServiceWatcher::serviceRegistered,
+            [&owned](const QString&){owned = true;}
+        );
+
+        // start the mock greeter
+        QVariantMap parameters;
+        parameters["IsActive"] = QVariant(is_active);
+        m_dbus_mock->registerTemplate(
+            DBusNames::UnityGreeter::NAME,
+            GREETER_TEMPLATE,
+            parameters,
+            QDBusConnection::SessionBus
+        );
+        m_dbus_runner->startServices();
+
+        // wait for the watcher to be triggered
+        ASSERT_TRUE(wait_for([&owned]{return owned;}));
+    }
+};
+
+#define ASSERT_PROPERTY_EVENTUALLY(expected_in, property_in) \
+    do { \
+        const auto& e = expected_in; \
+        const auto& p = property_in; \
+        ASSERT_TRUE(wait_for([e, &p](){ return e == p.get(); })) \
+            << "expected " << e << " but got " << p.get(); \
+   } while(0)
+
+TEST_F(GreeterFixture, ActiveServiceStartsBeforeWatcher)
+{
+    constexpr bool expected {true};
+
+    start_greeter_service(expected);
+
+    UnityGreeter greeter(m_session_bus);
+
+    ASSERT_PROPERTY_EVENTUALLY(expected, greeter.is_active());
+}
+
+TEST_F(GreeterFixture, WatcherStartsBeforeActiveService)
+{
+    constexpr bool expected {true};
+
+    UnityGreeter greeter(m_session_bus);
+
+    start_greeter_service(expected);
+
+    ASSERT_PROPERTY_EVENTUALLY(expected, greeter.is_active());
+}
+
+TEST_F(GreeterFixture, InactiveServiceStartsBeforeWatcher)
+{
+    constexpr bool expected {false};
+
+    start_greeter_service(expected);
+
+    UnityGreeter greeter(m_session_bus);
+
+    ASSERT_PROPERTY_EVENTUALLY(expected, greeter.is_active());
+}
+
+TEST_F(GreeterFixture, WatcherStartsBeforeInactiveService)
+{
+    constexpr bool expected {false};
+
+    UnityGreeter greeter(m_session_bus);
+
+    start_greeter_service(expected);
+
+    ASSERT_PROPERTY_EVENTUALLY(expected, greeter.is_active());
+}
+