test: Rename watchdog_test to watchdog

Tested:
    Ran through build and unit test suite.

Change-Id: I3a906ac26c43ac419eef8a98b20a498fe22f942b
Signed-off-by: William A. Kennington III <wak@google.com>
diff --git a/test/watchdog.hpp b/test/watchdog.hpp
new file mode 100644
index 0000000..09aceed
--- /dev/null
+++ b/test/watchdog.hpp
@@ -0,0 +1,55 @@
+#include "../watchdog.hpp"
+
+#include <chrono>
+#include <memory>
+#include <sdbusplus/bus.hpp>
+#include <sdeventplus/event.hpp>
+
+#include <gtest/gtest.h>
+
+using namespace std::chrono;
+using namespace std::chrono_literals;
+
+// Test Watchdog functionality
+class WdogTest : public ::testing::Test
+{
+  public:
+    // Gets called as part of each TEST_F construction
+    WdogTest() :
+        event(sdeventplus::Event::get_default()),
+        bus(sdbusplus::bus::new_default()),
+        wdog(std::make_unique<phosphor::watchdog::Watchdog>(bus, TEST_PATH,
+                                                            event)),
+        defaultInterval(milliseconds(wdog->interval())), defaultDrift(30)
+    {
+        // Initially the watchdog would be disabled
+        EXPECT_FALSE(wdog->enabled());
+    }
+
+    // sdevent Event handle
+    sdeventplus::Event event;
+
+    // sdbusplus handle
+    sdbusplus::bus::bus bus;
+
+    // Watchdog object
+    std::unique_ptr<phosphor::watchdog::Watchdog> wdog;
+
+    // This is the default interval as given in Interface definition
+    milliseconds defaultInterval;
+
+    // Acceptable drift when we compare the interval to timeRemaining.
+    // This is needed since it depends on when do we get scheduled and it
+    // has happened that remaining time was off by few msecs.
+    milliseconds defaultDrift;
+
+  protected:
+    // Dummy name for object path
+    // This is just to satisfy the constructor. Does not have
+    // a need to check if the objects paths have been created.
+    static constexpr auto TEST_PATH = "/test/path";
+
+    // Returns how long it took for the current watchdog timer to be
+    // disabled or have its timeRemaining reset.
+    seconds waitForWatchdog(seconds timeLimit);
+};