Hello,
we did some changes in jersey test framework which may affect you, so if 
you are using it, please pay attention.
Test framework is now modularized and you have to specify that 
particular module (or modules) on classpath. jersey-test-framework 
itself doesn't provide any factories. There are some following rules to 
determine which container will be used:
- when jersey.test.containerFactory property is not specified, container 
factory from module in dependencies (on classpath) will be used. There 
are two scenarios when your project depends on more than one test 
framework module:
    - grizzly module is present on classpath: grizzly web container will 
be used (because its default test container)
    - grizzly module is not present on classpath: warning will be 
produced and first found factory used (which one is specified in warning 
message)
- when jersey.test.containerFactory property is specified, and loadable 
(its module is on classpath), then corresponding test factory will be used
examples:
1) I have maven based project which depends on:
        <dependency>
            <groupId>com.sun.jersey.jersey-test-framework</groupId>
            <artifactId>jersey-test-framework-inmemory</artifactId>
            <version>1.2-SNAPSHOT</version>
            <scope>test</scope>
        </dependency>
when "mvn clean install" is executed, inmemory test factory will be used 
and you don't have to do anything else.
2) I have maven based project which depends on:
        <dependency>
            <groupId>com.sun.jersey.jersey-test-framework</groupId>
            <artifactId>jersey-test-framework-grizzly</artifactId>
            <version>1.2-SNAPSHOT</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>com.sun.jersey.jersey-test-framework</groupId>
            <artifactId>jersey-test-framework-external</artifactId>
            <version>1.2-SNAPSHOT</version>
            <scope>test</scope>
        </dependency>
then I can exec "mvn clean install" and tests will run on grizzly web 
container (default containerFactory). Or if I want run my tests on 
externalContainer, I can do:
mvn clean install 
-Djersey.test.containerFactory=com.sun.jersey.test.framework.spi.container.external.ExternalTestContainerFactory 
-DJERSEY_HTTP_PORT=8080
and test will be executed against external container running on 
http://localhost:8080/...
If you have own containerFactory implementation and you want to create 
your module, take a look at  
https://jersey.dev.java.net/source/browse/jersey/trunk/jersey/jersey-test-framework/jersey-test-framework-external/ 
(or any other module). Basically you can just package your test factory 
into jar and put it on classpath and activate it by specifying 
"jersey.test.containerFactory" property. If you want get rid of that 
property (and you have only one container module on classpath), you can 
create 
META-INF/services/com.sun.jersey.test.framework.spi.container.TestContainerFactory 
file in your jar and put fully classified java class name of your 
factory inside.
Please let me k now if you have some objections/suggestions in this 
matter, jersey 1.2 is going to be released sometime in March so there is 
time for adjustments.
Regads,
Pavel