如何在 intellij 中为 play 框架应用程序运行单元测试

Question

I tried running unit test on the play framework java starter example within intellij but it doesn't seem to work.

I downloaded the project and imported it into intellij via the SBT import.

When I tried running the tests from intellij I got "Class not found: "UnitTest"Empty test suite"

If I run the SBT test task, the tests are running and passing.

When I go bask to running the tests from intellij after running the SBT test task, the test run and pass. It's like intellij is not compiling the project

I am working with intellij ultimate edition version 2018.2 and have the scala plugin (v 2018.2.11)

How can I make this work?

Edit (in respose to @hce)

I upgraded intellij to the latest version: 2018.3.2 (couldn't find 2018.3.5) but I still experience similar problems.

I started with a newly downloaded starter project. import the sbt project:

Then tried to compile and got an error:

I managed to solve the compilation problem by configuring intellij to use the play2 compiler ("Use play2 compiler for this project")

I then tried running the tests and but intellij complains it can't find the class

this is the run configuration that was created by intellij. the class name (UnitTest) is marked red...

Is it any different in your environment?

Is there anything wrong in my process?

Answer 1

I tested it with IntelliJ 2018.3.5 and the Scala plugin. It works well. So the cause seems to be in the configuration of your project. It would be helpful if you can provide your run/debug configuration and the settings. There are many reasons. You could try the following...

• Make sure you use java 1.8 as the project jdk.
• Use sbt 1.2.1
• Check your run/debug configuration.
• File -> Invalidate Caches/Restart...
• Build --> Rebuild Project
• Run --> Edit Configurations / remove Junit / Apply and restart your test. A new Junit configuration is created automatically

Edit: After the comments of @NirBrachel, the solution was to use the sbt-shell to compile the project. (I recommend clean, compile and test).

You could automate this during import:

Why? Info: sbt compilation for play framework 2.x disabled by default

You can try to activate Play2 framework in the Settings...

WARNING: This settings didn't work for me, because it's not saved by IntelliJ. I didn't find out yet why.

EDIT see this link for a possible cause.

Answer 2

I use Scala plugin and Play Framework. I can run tests in 3 ways:

• simple run 1 test from IDE (but I can't run all tests in package by this way)
• run tests from sbt
• run tests with use this configuration (it's allow run tests with coverage):

Sorry for my English.