Docs for Spring MVC Test should cover async requests [SPR-15099]

[spring-projects-issues]

John Mark opened SPR-15099 and commented

MockMvc does not support async dispatches (as documented here). What actually happens is that the test can act in a non-deterministic fashion - failing intermittently, but passing sometimes - depending on how quick the async dispatch happens. It would be nice if MockMvc would fail-fast if async dispatch is used. This would reduce time spent investigating intermittently failing unit tests.

---

No further details from SPR-15099

[spring-projects-issues]

Sam Brannen commented

Depending on what you mean by async dispatches not being supported, this is perhaps just an issue with the documentation.

MockMvc does in fact support async dispatches via the asyncDispatch(MvcResult) method. Take a look at AsyncControllerJavaConfigTests for a concrete example.

[spring-projects-issues]

Sam Brannen commented

You can find further examples for async dispatch in the Spring MVC Showcase tests.

[spring-projects-issues]

John Mark commented

I had not seen those examples. Perhaps the official Spring reference documentation should include some information about this.

I still think that it would be good for it to fail fast when asyncDispatch(MvcResult) is not used instead of acting in a non deterministic manner.