public async Task TestClearCache()
{
_coverService.CacheSize().Returns(1000);
Assert.True(_settingsViewModel.CanClearCache);
await _settingsViewModel.ClearCache();
_coverService.Received(1).ClearCache();
Assert.Equal("1000.00 B", _settingsViewModel.CacheSize);
Assert.True(_settingsViewModel.CanClearCache);
}