public void When_invocation_fails_and_second_interceptor_handles_the_exception__first_interceptor_does_not_know_about_the_exception()
{
var interceptor = new ChainInterceptor <Context>();
interceptor.Add(BuildRoutine.Interceptor <Context>().Do()
.Before(ctx => ctx.Value += " - before1")
.Success(ctx => ctx.Value += " - success1")
.After(ctx => ctx.Value += " - after1"));
interceptor.Add(BuildRoutine.Interceptor <Context>().Do()
.Before(ctx => ctx.Value += " - before2")
.Fail(ctx =>
{
ctx.Value += " - fail2 (handled)";
ctx.ExceptionHandled = true;
ctx.Result = "result2";
})
.After(ctx => ctx.Value += " - after2"));
var testing = interceptor;
invocation.Context.Value = "begin";
invocation.FailsWith(new Exception());
var actual = invocation.Intercept(testing);
Assert.AreEqual("result2", actual);
Assert.AreEqual("begin - before1 - before2 - fail2 (handled) - after2 - success1 - after1", invocation.Context.Value);
Assert.AreEqual(1, invocation.Count);
}
public void First_added_interceptor_wraps_the_second_one_and_invocation_happens_last()
{
var interceptor = new ChainInterceptor <Context>();
interceptor.Add(BuildRoutine.Interceptor <Context>().Do()
.Before(ctx => ctx.Value += " - before1")
.Success(ctx => ctx.Value += " - success1")
.After(ctx => ctx.Value += " - after1"));
interceptor.Add(BuildRoutine.Interceptor <Context>().Do()
.Before(ctx => ctx.Value += " - before2")
.Success(ctx => ctx.Value += " - success2")
.After(ctx => ctx.Value += " - after2"));
var testing = interceptor;
invocation.Context.Value = "begin";
invocation.Returns("actual");
var actual = invocation.Intercept(testing);
Assert.AreEqual("actual", actual);
Assert.AreEqual("begin - before1 - before2 - success2 - after2 - success1 - after1", invocation.Context.Value);
Assert.AreEqual(1, invocation.Count);
}
public void When_first_interceptor_fails_on_success__second_interceptor_does_not_know_about_the_exception()
{
var interceptor = new ChainInterceptor <Context>();
interceptor.Add(BuildRoutine.Interceptor <Context>().Do()
.Before(ctx => ctx.Value += " - before1")
.Success(ctx =>
{
ctx.Value += " - success1";
throw new Exception();
})
.Fail(ctx => ctx.Value += " - fail1")
.After(ctx => ctx.Value += " - after1"));
interceptor.Add(BuildRoutine.Interceptor <Context>().Do()
.Before(ctx => ctx.Value += " - before2")
.Success(ctx => ctx.Value += " - success2")
.After(ctx => ctx.Value += " - after2"));
var testing = interceptor;
invocation.Context.Value = "begin";
invocation.Returns("actual");
Assert.Throws <Exception>(() => invocation.Intercept(testing));
Assert.AreEqual("begin - before1 - before2 - success2 - after2 - success1 - fail1 - after1", invocation.Context.Value);
Assert.AreEqual(1, invocation.Count);
}
public void When_an_empty_chain_intercepts_some_invocation__invocation_is_directly_called()
{
var testing = new ChainInterceptor <Context>();
invocation.Returns("actual");
var actual = invocation.Intercept(testing);
Assert.AreEqual("actual", actual);
Assert.AreEqual(1, invocation.Count);
}
public void When_an_empty_chain_is_merged_with_a_chain__given_chain_s_links_added_to_the_empty_one()
{
var interceptor1 = new ChainInterceptor <Context>();
var interceptor2 = new ChainInterceptor <Context>();
interceptor2.Add(BuildRoutine.Interceptor <Context>().Before(ctx => ctx.Value += " - before1"));
interceptor2.Add(BuildRoutine.Interceptor <Context>().Before(ctx => ctx.Value += " - before2"));
interceptor1.Merge(interceptor2);
var testing = interceptor1;
invocation.Context.Value = "begin";
invocation.Intercept(testing);
Assert.AreEqual("begin - before1 - before2", invocation.Context.Value);
Assert.AreEqual(1, invocation.Count);
}
public void Merging_two_chains_connects_given_chain_to_the_last_link_of_the_root_chain()
{
var interceptor1 = new ChainInterceptor <Context>();
interceptor1.Add(BuildRoutine.Interceptor <Context>().Before(ctx => ctx.Value += " - before1"));
interceptor1.Add(BuildRoutine.Interceptor <Context>().Before(ctx => ctx.Value += " - before2"));
var interceptor2 = new ChainInterceptor <Context>();
interceptor2.Add(BuildRoutine.Interceptor <Context>().Before(ctx => ctx.Value += " - before3"));
interceptor2.Add(BuildRoutine.Interceptor <Context>().Before(ctx => ctx.Value += " - before4"));
interceptor1.Merge(interceptor2);
var testing = interceptor1;
invocation.Context.Value = "begin";
invocation.Intercept(testing);
Assert.AreEqual("begin - before1 - before2 - before3 - before4", invocation.Context.Value);
Assert.AreEqual(1, invocation.Count);
}
public void When_invocation_fails_all_interceptors_work_in_the_reverse_order__since_first_wraps_second()
{
var interceptor = new ChainInterceptor <Context>();
interceptor.Add(BuildRoutine.Interceptor <Context>().Do()
.Before(ctx => ctx.Value += " - before1")
.Fail(ctx => ctx.Value += " - fail1")
.After(ctx => ctx.Value += " - after1"));
interceptor.Add(BuildRoutine.Interceptor <Context>().Do()
.Before(ctx => ctx.Value += " - before2")
.Fail(ctx => ctx.Value += " - fail2")
.After(ctx => ctx.Value += " - after2"));
var testing = interceptor;
invocation.Context.Value = "begin";
invocation.FailsWith(new Exception());
Assert.Throws <Exception>(() => invocation.Intercept(testing));
Assert.AreEqual("begin - before1 - before2 - fail2 - after2 - fail1 - after1", invocation.Context.Value);
Assert.AreEqual(1, invocation.Count);
}
public void After_merging_two_chains__new_interceptor_is_added_to_the_very_last_chain_link()
{
var interceptor1 = new ChainInterceptor <Context>();
interceptor1.Add(BuildRoutine.Interceptor <Context>().Before(ctx => ctx.Value += " - before1"));
interceptor1.Add(BuildRoutine.Interceptor <Context>().Before(ctx => ctx.Value += " - before2"));
var interceptor2 = new ChainInterceptor <Context>();
interceptor2.Add(BuildRoutine.Interceptor <Context>().Before(ctx => ctx.Value += " - before3"));
interceptor2.Add(BuildRoutine.Interceptor <Context>().Before(ctx => ctx.Value += " - before4"));
interceptor1.Merge(interceptor2);
interceptor1.Add(BuildRoutine.Interceptor <Context>().Before(ctx => ctx.Value += " - before5"));
var testing = interceptor1;
invocation.Context.Value = "begin";
invocation.Intercept(testing);
Assert.AreEqual("begin - before1 - before2 - before3 - before4 - before5", invocation.Context.Value);
Assert.AreEqual(1, invocation.Count);
}
private async Task <ChainInterceptor> getChainInterceptor(IList <FilterBase> globalFilters, IList <FilterBase> serviceFilters)
{
var newFilters = new List <FilterBase>();
newFilters.AddRange(globalFilters);
newFilters.AddRange(serviceFilters);
while (true)
{
var firstOverrideFilter = (from item in newFilters
where item is OverrideFilter
select item).FirstOrDefault();
if (firstOverrideFilter == null)
{
break;
}
var index = newFilters.IndexOf(firstOverrideFilter);
var overrideFilter = firstOverrideFilter as OverrideFilter;
if (overrideFilter.OverrideType == null && string.IsNullOrEmpty(overrideFilter.OverrideTypeName))
{
newFilters.RemoveRange(0, index);
}
else if (overrideFilter.OverrideType != null && !string.IsNullOrEmpty(overrideFilter.OverrideTypeName))
{
var filtersRange = newFilters.GetRange(0, index);
var removeItems = (from item in filtersRange
where item.Type == overrideFilter.OverrideTypeName && item.GetType() == overrideFilter.OverrideType
select item).ToList();
foreach (var removeItem in removeItems)
{
newFilters.Remove(removeItem);
}
}
else if (overrideFilter.OverrideType != null && string.IsNullOrEmpty(overrideFilter.OverrideTypeName))
{
var filtersRange = newFilters.GetRange(0, index);
var removeItems = (from item in filtersRange
where item.GetType() == overrideFilter.OverrideType
select item).ToList();
foreach (var removeItem in removeItems)
{
newFilters.Remove(removeItem);
}
}
else if (overrideFilter.OverrideType == null && !string.IsNullOrEmpty(overrideFilter.OverrideTypeName))
{
var filtersRange = newFilters.GetRange(0, index);
var removeItems = (from item in filtersRange
where item.Type == overrideFilter.OverrideTypeName
select item).ToList();
foreach (var removeItem in removeItems)
{
newFilters.Remove(removeItem);
}
}
newFilters.Remove(overrideFilter);
}
var newInterceptorList = new List <Interceptor>();
foreach (var item in newFilters)
{
newInterceptorList.Add(item.Interceptor);
}
ChainInterceptor interceptor = new ChainInterceptor(newInterceptorList);
return(await Task.FromResult(interceptor));
}