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Testing Java with Visual Studio Code. Testing Java in Visual Studio Code is enabled by the Java Test Runner extension. It's a lightweight extension to run and debug Java test cases. The extension supports the following test frameworks: JUnit 4 (v4.8.0+) JUnit 5 (v5.1.0+) TestNG (v6.8.0+). Hot Code Replace; The Java debugger is an open-source project, which welcomes contributors to collaborate through GitHub repositories: Debugger for Java Extension; Java Debugger Server for Visual Studio Code; If you run into any issues when using the features below, you can contact us by clicking the Report an issue button below. It will soon be possible to write and edit Java code entirely from within the Visual Studio IDE, thanks to an upgrade of JNBridge's namesake general purpose Java/.NET interoperability tool.
Testing Java in Visual Studio Code is enabled by the Java Test Runner extension. It's a lightweight extension to run and debug Java test cases. The extension supports the following test frameworks:
- JUnit 4 (v4.8.0+)
- JUnit 5 (v5.1.0+)
- TestNG (v6.8.0+)
Note: More information about the test frameworks can be found at JUnit and TestNG.
The Java Test Runner works with the Language Support for Java by Red Hat and Debugger for Java extensions to provide the following features:
- Run/Debug test cases
- Customize test configurations
- View test report
- View tests in Test Explorer
- Show test logs
If you run into any issues when using the features below, you can contact us by clicking the Report an issue button below.
Make sure you have the below tools available already
- JDK (version 11 or later)
- VS Code (version 1.23.0 or later)
You may refer to Java Extensions to set up the environment.
Note: More information about JDK can be found at supported Java versions.
Getting Started for JUnit 5
Please refer to Getting Started from the JUnit 5 official documentation.
Note: You can use junit-platform-console-standalone.jar in projects that manually manage their dependencies similar to the plain-old JAR known from JUnit 4.
Getting Started for JUnit 4
Please refer to Download and Install from the JUnit 4 official documentation.
Getting Started for TestNG
Please refer to TestNG Docs from the TestNG official documentation.
Run Debug CodeLens
Setup Java In Visual Studio Code
When you open a project with test cases from supported frameworks, Test Runner will be activated and you will find Run Debug on the CodeLens of your test functions. Click on the CodeLens to run the individual test case. You can also access and run a group of test cases from the Test Explorer. For more information on debugging test cases, see Debugging Java.
Here's a brief session with TestNG:
Run/Debug Test Cases
- The extension will generate Run Test and Debug Test shortcuts (also known as CodeLens) above the class and method definition. Select them to start running or debugging the target test cases.
Note: If you cannot see the CodeLens in your editor, please refer to this issue comment as a workaround.
- The Test Explorer is the place to show all the test cases in your project. You can also run/debug your test cases from here.
- Click the node in the Test Explorer will navigate to the location of the source code.
Note: If the Test Explorer is empty, please refer to this issue comment as a workaround.
Java Extension In Visual Studio Code
Customize Test Configurations
- Sometimes you may want to customize the configuration for running the test cases. To achieve this, you can add it into your workspace settings under the section:
Note: More details can be found in Run with Configuration.
Java In Visual Studio Code Tutorial
View Test Report
- After running/debugging the test cases, the test report is opened automatically. You can also see the final results in the status bar, by clicking on it to show the Test Report.
- You can also click the ✔️ or ❌ mark in the CodeLens to open the Test Report.
- For a quick peek of the test status or results, you can see them in the Test Explorer directly.
- You can navigate to the source location of the target test case by clicking the navigate button.
The JUnit 5 support covers frequently used annotations such as
@Nested. It also supports meta-annotations and composed annotations.
If you meet any problem when using the extension, you can refer to the FAQ to check if there is an answer to your problem.
Visit the GitHub repository of the Java Test Runner for more details on commands and settings.
Read on to find out about:
- Debugging - Find out how to debug your Java project with VS Code.
- Java Extensions - Learn about more useful Java extensions for VS Code.