spring-projects/spring-integration-extensions — pull request #102 by TYsewyn (2014-08-20 12:33:48+00:00)
Title: Java DSL: Assertion error "headerExpressions must not be empty"

Fix for spring-projects#101

If we don't add a `headerExpression` on the `EnricherSpec` class (because we simply only want to enrich the payload), we will get an assertion error in the `ContentEnricher` class saying
```
headerExpressions must not be empty
```

The is also the same when we only want to use header expressions.

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