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_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);
}
public static ConventionBase <TFrom, List <IInterceptor <TContext> > > Interceptor <TFrom, TContext>(
this ConventionBuilder <TFrom, List <IInterceptor <TContext> > > source,
Func <InterceptorBuilder <TContext>, IInterceptor <TContext> > interceptorDelegate)
where TContext : InterceptionContext =>
source.Constant(interceptorDelegate(BuildRoutine.Interceptor <TContext>()));