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https://issues.apache.org/jira/browse/DERBY-3204?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12543022
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John H. Embretsen commented on DERBY-3204:
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I just realized that there actually is a test for the "simple" demo, 
SimpleApp.java. That is, the simple demo is run as a separate test as part of 
the following suites in the old harness:

         * simpledemo
      * demo
   * derbyall

SimpleApp.class is included in derbyTesting.jar.

Running the test with -Dframework=DerbyNetClient still runs it in embedded 
mode. I think this is because the demo requires the argument "derbyclient" for 
it to use the client driver, and no arguments are sent from the test harness. 
Also, the test classpath probably includes more than what is specified in the 
demo instructions. As part of derbyall, the demo suite only runs in the 
embedded framework. All this prevented the DERBY-3187 simple demo client 
regression in 10.3.1.4 from being detected by derbyall runs.

The checkToursDB.java test is also part of the demo suite, run as part of 
derbyall (embedded). This test only supports the embedded framework. The 
toursdb demo's sql files are included in derbyTesting.jar.

> Regression tests for demos included in releases
> -----------------------------------------------
>
>                 Key: DERBY-3204
>                 URL: https://issues.apache.org/jira/browse/DERBY-3204
>             Project: Derby
>          Issue Type: Improvement
>          Components: Demos/Scripts, Test
>    Affects Versions: 10.3.1.4
>            Reporter: John H. Embretsen
>
> Several demos are included in Derby's -bin distributions, but there are 
> almost no tests in place to verify that these demos still work as expected, 
> or that they work at all. There should be (JUnit?) tests in place testing at 
> least some of these demos in their intended environments. These tests should 
> be run at regular intervals, for example as part of the release process, or 
> as part of the regular regression test suites.
> In -bin distributions, various demo programs are located in the directory 
> demo/programs/. For the next feature release this currently includes:
>    * localcal
>    * nserverdemo
>    * scores
>    * simple
>    * toursdb
>    * vtis
>    * workingwithderby
> DERBY-3190 adds yet another demo, simplemobile.
> There is currently one demo test in 
> java/testing/org/apache/derbyTesting/functionTests/tests/demo/, called 
> checkToursDB.java (old harness).

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