public async Task GetDictionaryAsync()
{
Expression <Func <Customer, string> > selector = x => x.Name;
var options = new QueryOptions <Customer>();
var mock = new Mock <IService <Customer> >();
mock.Setup(x => x.GetDictionaryAsync(It.IsAny <Expression <Func <Customer, string> > >(), It.IsAny <CancellationToken>()));
mock.Setup(x => x.GetDictionaryAsync(It.IsAny <Expression <Func <Customer, string> > >(), It.IsAny <Expression <Func <Customer, string> > >(), It.IsAny <CancellationToken>()));
mock.Setup(x => x.GetDictionaryAsync(It.IsAny <IQueryOptions <Customer> >(), It.IsAny <Expression <Func <Customer, string> > >(), It.IsAny <CancellationToken>()));
mock.Setup(x => x.GetDictionaryAsync(It.IsAny <IQueryOptions <Customer> >(), It.IsAny <Expression <Func <Customer, string> > >(), It.IsAny <Expression <Func <Customer, string> > >(), It.IsAny <CancellationToken>()));
var readOnlyService = new ReadOnlyServiceWrapper <Customer, int>(mock.Object);
await readOnlyService.GetDictionaryAsync(selector);
await readOnlyService.GetDictionaryAsync(selector, selector);
await readOnlyService.GetDictionaryAsync(options, selector);
await readOnlyService.GetDictionaryAsync(options, selector, selector);
mock.Verify(x => x.GetDictionaryAsync(selector, default(CancellationToken)), Times.Once);
mock.Verify(x => x.GetDictionaryAsync(selector, selector, default(CancellationToken)), Times.Once);
mock.Verify(x => x.GetDictionaryAsync(options, selector, default(CancellationToken)), Times.Once);
mock.Verify(x => x.GetDictionaryAsync(options, selector, selector, default(CancellationToken)), Times.Once);
}
