# **JUnit Example**

## This example can be completed using either Method 1 (Terminal) or Method 2 (VSCode Extension)

## Method 1 (Terminal) [Works with any IDE]

Open this [github link](https://github.com/Darleenie/junitDemo) and download the repository (Click the green button labeled "code" then click "Download ZIP"). **Note**: The .jar files located in the "lib" folder are important for running JUnit tests.

1. Open your terminal/command prompt and change the directory to the repository you just downloaded (i.e., week1Discussion-main)

2. Run these commands:

Mac Users:
Compile:
`javac -cp libs/junit-4.12.jar:libs/hamcrest-core-1.3.jar:. DemoArrayImplTester.java`
Execute:

Window Users:
Compile:
`javac -cp ".;libs\junit-4.12.jar;libs\hamcrest-core-1.3.jar" DemoArrayImplTester.java`
Execute:
`java -cp ".;libs\junit-4.12.jar;libs\hamcrest-core-1.3.jar" org.junit.runner.JUnitCore DemoArrayImplTester`


Command explanation: 
**javac:** compilation.
**libs/junit-4.12.jar:libs/hamcrest-core-1.3.jar:.** dependencies needed to compile JUnit tests.
**DemoArrayImplTester.java:** The java file containing the JUnit tests.

**Please complete the TODOs! (No need to turn anything in)**

## Method 2 (VScode extension)

Download the github repo as explained above. Then, open the folder in VSCode (File > Open Folder > Click on the repository)


---
Once the files are added, you might notice that there are some red errors.

![](https://i.imgur.com/H07YX1d.png)

1. On the left side of VSCode, there are ICONS, please click on the icon that looks like a beaker. If there is no beaker, please click on the extensions icon (square blocks) and download "Extension Pack for Java".
**Note:** The beaker icon will only show up if you have the tester file "DemoArrayImplTester.java" open.
![](https://i.imgur.com/PZiXvL9.png)

2. Please Enable Java Test and select **JUnit** not **JUnit Jupiter**
![](https://i.imgur.com/pRW5Qfn.png)
![](https://i.imgur.com/Tj6VSXW.png)


3. Then you will see the unit Tests if they pass or fail. All of them will pass but this image below is an idea of what should look like.
![](https://i.imgur.com/Lo3vMvm.png)

They will look like they are passed because there is nothing in the TODO Test
**Also** complete TODOs!