Maybe this is related to the issue described at 
https://lightrun.com/answers/gwtproject-gwt-28-rc2-all-gwttestcase-after-the-first-fails
 
?

On Wednesday, August 3, 2022 at 9:58:16 PM UTC-7 Slava Imeshev wrote:

> No and no. I’m following the structure generated by net.ltgt.gwt.maven’s 
>
> mvn archetype:generate \
>    -DarchetypeGroupId=net.ltgt.gwt.archetypes \
>    -DarchetypeVersion=LATEST \
>    -DarchetypeArtifactId=modular-webapp
>
> That generates Maven’s client, shared and server modules. shared is not a 
> GWT module in that structure. At any rate, I changed the module name to 
> have the package name set as a super package of both client and shared and 
> the compilation goes through. 
>
> Now, while it compiles, the client module tests fail with to instantiate 
> any custom widgets that are *below* the module package 
> ‘com.effectiveem.app.gwt’. For example, 'com.effectiveem.app.gwt
> .client'
>
> [ERROR] 
> testUpdateRowWithUnmodified(com.effectiveem.app.gwt.client.document.GapAnalysisItemListTableGWTTest)
>  
>  Time elapsed: 0.032 s  <<< ERROR!
> com.google.gwt.core.shared.SerializableThrowable: 
> com.effectiveem.app.gwt.EemApp.JUnit:com.effectiveem.app.gwt.client.document.GapAnalysisItemListTableGWTTest.testUpdateRowWithUnmodified:
>  
> could not instantiate the requested class
> Caused by: com.google.gwt.core.shared.SerializableThrowable: (TypeError) : 
> Cannot call method "new" of undefined
>
> Obviously, I’m doing something wrong but I’m struggling to understand what.
>
> Slava Imeshev
> ime...@gmail.com
> Cell: 650-704-6147 <(650)%20704-6147>
>
>
>
> On Aug 3, 2022, at 6:45 PM, Michael Conrad <m.conr...@gmail.com> wrote:
>
> Did you give the shared module a gwt.xml file? Did you inherit in the main 
> project's gwt.xml the shared module's gwt.xml file?
>
> On Wed, Aug 3, 2022 at 8:48 PM Slava Imeshev <ime...@gmail.com> wrote:
>
>> Continuing the journey, in this multi-module client/shared/server 
>> structure, is it possible to have the shared code in a package different 
>> from the client? 
>>
>> I get 
>>
>> "No source code is available for type 
>> com.effectiveem.app.gwt.shared.GapAnalysisLineItemVO; did you forget to 
>> inherit a required module?
>> [ERROR] Hint: Check the inheritance chain from your module; it may not be 
>> inheriting a required module or a module may not be adding its source path 
>> entries properly"
>>
>> The client sits in com.effectiveem.app.gwt.client.
>>
>> Client's pom sets the module name to 
>>
>> <moduleName>com.effectiveem.app.gwt.client.EemApp</moduleName>
>>
>>
>> On Wednesday, July 13, 2022 at 1:53:19 AM UTC-7 t.br...@gmail.com wrote:
>>
>>> On Wednesday, July 13, 2022 at 3:06:37 AM UTC+2 ime...@gmail.com wrote:
>>>
>>>> Thank you, the setting the <include> did it.
>>>>
>>>
>>> FYI, using a GWTTestSuite can improve performance (that's why it's the 
>>> default in the plugin, because it favors best practices): 
>>> https://www.gwtproject.org/doc/latest/DevGuideTesting.html#DevGuideJUnitSuites
>>>  
>>>
>>>> My next question about testing is, what are the expectations for the 
>>>> test module? Are we still required to provide a separate JUnit.gwt.xml?
>>>>
>>>
>>> You've never been (or at least not for many many years) as GWT will 
>>> synthesize a module that inherits both com.google.gwt.junit.JUnit and the 
>>> module your GWTTestCase's getModuleName() returns.
>>> The gwt-maven-plugin itself has no specific expectations either, so 
>>> https://www.gwtproject.org/doc/latest/DevGuideTesting.html should apply 
>>> as-is (I haven't re-read it though, but that's the goal of the plugin, to 
>>> be a "thin" wrapper that only wires things that are specific to Maven, e.g. 
>>> src/main/java, computing the classpath from dependencies, etc.)
>>>
>>>
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