> For the complete documentation index, see [llms.txt](https://emory.gitbook.io/dsa-java/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://emory.gitbook.io/dsa-java/getting-started/exercises.md).

# 0.2. Quiz

## Coding

Right-click on the [`src/main/java`](https://github.com/emory-courses/dsa-java/tree/master/src/main/java) directory under the project and create the package [`edu.emory.cs.utils`](https://github.com/emory-courses/dsa-java/tree/master/src/main/java/edu/emory/cs/utils). Right-click on the `utils` package and create the Java class [`Utils`](https://github.com/emory-courses/dsa-java/blob/master/src/main/java/edu/emory/cs/utils/Utils.java):

* Add `Utils.java` to git.
* Add the following methods to the `Utils` class:

```java
static public int getMiddleIndex(int beginIndex, int endIndex) {
    return beginIndex + (endIndex - beginIndex) / 2;
}

static public void main(String[] args) {
    System.out.println(getMiddleIndex(0, 10));
}
```

Run the program by clicking `[Run -> Run]`.  If you see `5` on the output pane, your program runs successfully.

## Testing

Open [`build.gradle`](https://github.com/emory-courses/dsa-java/blob/master/build.gradle) and add the following configurations (if not already), which would allow you to perform [JUnit Testing](https://junit.org/junit5/):

```groovy
test {
    useJUnitPlatform()
}

dependencies {
    testImplementation 'org.junit.jupiter:junit-jupiter-api:5.8.2'
    testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine:5.8.2'
}
```

Right-click on the [`src/test/java`](https://github.com/emory-courses/dsa-java/tree/master/src/test/java) directory under the project and create the package [`edu.emory.cs.utils`](https://github.com/emory-courses/dsa-java/tree/master/src/test/java/edu/emory/cs/utils).  Right-click on the `utils` package and create the Java class [`UtilsTest`](https://github.com/emory-courses/dsa-java/blob/master/src/test/java/edu/emory/cs/utils/UtilsTest.java):

* Add `UtilsTest.java` to Git.
* Add the following method to the `UtilsTest` class.  Make sure to include all imports:

```java
package edu.emory.cs.utils;

import org.junit.jupiter.api.Test;
import static org.junit.jupiter.api.Assertions.assertEquals;

@Test
public void getMiddleIndexTest() {
    assertEquals(5, Utils.getMiddleIndex(0, 10));
}
```

Run the test by clicking `[Run -> Run]`.  If you see the test passed, your unit test runs successfully.

## Submission

1. Add the instructors as collaborators in your GitHub repository:

* Jinho Choi: `jdchoi77`
* Peilin Wu: `qualidea1217`
* Jeongrok Yu: jeongrok
* Zinc Zhao: `ZincZhao`

2\. Commit and push the following to your GitHub repository:

* [gradle/wrapper/gradle-wrapper.jar](https://github.com/emory-courses/dsa-java/blob/master/gradle/wrapper/gradle-wrapper.jar)
* [gradle/wrapper/gradle-wrapper.properties](https://github.com/emory-courses/dsa-java/blob/master/gradle/wrapper/gradle-wrapper.properties)
* [.gitignore](https://github.com/emory-courses/dsa-java/blob/master/.gitignore)
* [build.gradle](https://github.com/emory-courses/dsa-java/blob/master/build.gradle)
* [gradlew](https://github.com/emory-courses/dsa-java/blob/master/gradlew)
* [gradlew.bat](https://github.com/emory-courses/dsa-java/blob/master/gradlew.bat)
* [settings.gradle](https://github.com/emory-courses/dsa-java/blob/master/settings.gradle)
* [src/main/java/edu/emory/cs/utils/Utils.java](https://github.com/emory-courses/dsa-java/blob/master/src/main/java/edu/emory/cs/utils/Utils.java)
* [src/test/java/edu/emory/cs/utils/UtilsTest.java](https://github.com/emory-courses/dsa-java/blob/master/src/test/java/edu/emory/cs/utils/UtilsTest.java)

3\. Submit the URL of your GitHub repository to Canvas.