How to reuse classes from /src/test/java in different project?

Question

I have a class in a commons library that I placed into /src/test/java. Then I want to reuse that class in any project having the commons library as dependency.

But the file cannot be imported.

Common custom library:

/src/test/java/com/myproject/utils/TestfileReader.java

Implementation project:

<dependencies>
    <dependency>
        <groupId>com.myproject</groupId>
        <artifactId>my-commons</artifactId>
        <version>1.0.0</version>
    </dependency>

usage:

/src/test/java/com/myproject/itest/SomeTest.java

import com.myproject.utils.TestfileReader;

Result: the import cannot be resolved.

But if I copy that file to /src/main/java/... it can be found correctly. So my commons library seems to be fine in general.

Question: how can I make this file visible only to my tests, while keeping it in /src/test/java folder?

put it in a separate project, add a dependency to this project in each project where you want to use it in a test. — Stultuske, Jan 04 '18 at 09:21
So I necessarily have to put that class under `/src/main/java`? — membersound, Jan 04 '18 at 09:21
So, you added a pom entry for that dependency, but is there such lib actually? (at least in your local repository) — Tom, Jan 04 '18 at 09:22
@Tom I think the problem is that the class is under the test classes, not under source — Stultuske, Jan 04 '18 at 09:23
@Tom yes of course. As written if I move that file to `/src/main/java` inside the commons library, it is found correctly. — membersound, Jan 04 '18 at 09:23
@membersound it seems quite unlogical that a same class, which is designed to test one specific class in project A can also be used to test a class in project B. if there is, there's something about code-reuse missing in the projects. So I'm not sure you can import classes under test — Stultuske, Jan 04 '18 at 09:24
Possible duplicate of [Sharing Test code in Maven](https://stackoverflow.com/questions/174560/sharing-test-code-in-maven) — Tom, Jan 04 '18 at 09:26
Then why is there no "scope" tag? Please read the dupe, it might solve the issue. — Tom, Jan 04 '18 at 09:26
@Stultuske Well in this case it's a common filereader that reads files from a path (provided as parameter), and processes the file in a specific way. If I need that routine in multiple projects, I think it's totally fine to reuse that class. But as it is only suitable for testing, I tend to not include it in the main path... — membersound, Jan 04 '18 at 09:27
@membersound so add it in a seperate (small) library, which you put as dependency and re-use in both projects' tests — Stultuske, Jan 04 '18 at 09:34

score 2 · Accepted Answer · edited Jan 04 '18 at 09:37

2

you can do this by specifying the type to test-jarscope.

<dependency>
    <groupId>com.myproject</groupId>
    <artifactId>my-commons</artifactId>
    <version>1.0.0</version>
    <type>test-jar</type>
    <scope>test</scope>
</dependency>

edited Jan 04 '18 at 09:37

membersound

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answered Jan 04 '18 at 09:29

Amer Qarabsa

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What if `my-commons` also contains classes that should be reused from `/src/main/java`? Would I then have to include the dependency 2 times, where one has `test-jar`? – membersound Jan 04 '18 at 09:31
At least it works when adding the dependency 2 times, with one having the testscope. – membersound Jan 04 '18 at 09:37
@membersound its a common practice to add the dependency for the src and for the test – Amer Qarabsa Jan 04 '18 at 09:38

score 0 · Answer 2 · answered Jan 04 '18 at 09:29

You can control whether your resources under your src/test folder will get shipped or not, e.g. via the maven-resource-plugin See here: http://maven.apache.org/plugins/maven-resources-plugin/testResources-mojo.html

An example here would copy all sources found under src/test/java into your final build.

<testResources>
  <testResource>
    <directory>${project.basedir}/src/test/java</directory>
  </testResource>
</testResources>

score 0 · Answer 3 · answered Jan 04 '18 at 09:33

You may do the following:

Create a jar file from the project that you want to share in different projects.
Use this jar file as dependencies by giving group id, artifact id and version.
Remember to add index of this jar file in your external dependencies.

score 0 · Answer 4 · edited Jul 11 '20 at 01:43

0

Absolutely, one can do it..

First You need to navigate to Build Path-->Configure Build Path--> Source tab

then in the Source tab search/check [your Project Name]/src/main/java and change

"contains test sources" from No to Yes and save it.

This will resolved issue of import packages from "src/test/java" to "src/main/java" successfully

edited Jul 11 '20 at 01:43

jizhihaoSAMA

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answered Jul 10 '20 at 22:49

Rahul Barahate

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How to reuse classes from /src/test/java in different project?

4 Answers4