Track: Add a test for the Track destructor

We want to make sure that the _library size is decremented whenever a
track is removed or destroyed.

Signed-off-by: Anna Schumaker <Anna@OcarinaProject.net>

core/tags.cpp

@@ -29,12 +29,6 @@ Track :: Track(const std::string &f, Library *library)
 	library->inc_size();
 }
 
-Track :: ~Track()
-{
-	if (_library)
-		_library->dec_size();
-}
-
 const std::string Track :: primary_key() const
 {
 	return path();

core/tags/track.cpp

@@ -17,6 +17,12 @@ Track :: Track(Album *album, Artist *artist, Genre *genre, Library *library)
 	_library->inc_size();
 }
 
+Track :: ~Track()
+{
+	if (_library)
+		_library->dec_size();
+}
+
 Album   *Track :: album()   { return _album;   }
 Artist  *Track :: artist()  { return _artist;  }
 Genre   *Track :: genre()   { return _genre;   }

tests/core/tags/track.cpp

@@ -42,12 +42,19 @@ static void test_track_tag_constructor()
 	test_equal(track.artist(),  artist);
 	test_equal(track.genre(),   genre);
 	test_equal(track.library(), library);
-	test_equal(track.library()->size(), (unsigned)1);
+	test_equal(library->size(), (unsigned)1);
+}
+
+static void test_track_tag_destructor()
+{
+	Library *library = tags :: get_library("/home/Zelda/Music");
+	test_equal(library->size(), (unsigned)0);
 }
 
 int main(int argc, char **argv)
 {
 	run_test("Track Tag Default Constructor Test", test_track_tag_default);
 	run_test("Track Tag Constructor Test", test_track_tag_constructor);
+	run_test("Track Tag Destructor Test", test_track_tag_destructor);
 	return 0;
 }