maven is unable to find any package from test cases

package my.helloworld;

import org.springframework.test.web.servlet.result.MockMvcResultMatchers.*;
import org.junit.Test;

public class HomeControllerTest {

}

The above is my test code. Even this empty code isn't compiling. Below is my pom.xml:

    <project xmlns="http://ift.tt/IH78KX" xmlns:xsi="http://ift.tt/ra1lAU"
     xsi:schemaLocation="http://ift.tt/IH78KX http://ift.tt/HBk9RF">
  <modelVersion>4.0.0</modelVersion>
  <groupId>my.helloworld</groupId>
  <artifactId>spring-helloworld</artifactId>
  <packaging>jar</packaging>
  <version>1.0-SNAPSHOT</version>
  <name>spring-helloworld</name>
  <url>http://ift.tt/19pvvEY;
  <properties>
    <jdk.version>1.6</jdk.version>
    <spring.version>3.2.13.RELEASE</spring.version>
    <jstl.version>1.2</jstl.version>
  </properties>

  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>3.8.1</version>
      <scope>test</scope>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>jstl</artifactId>
      <version>${jstl.version}</version>
    </dependency>
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>javax.servlet-api</artifactId>
      <version>3.1.0</version>
      <scope>provided</scope>
    </dependency>
  </dependencies>

  <build>
    <plugins>
      <plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-compiler-plugin</artifactId>
    <version>3.3</version>
    <configuration>
      <source>${jdk.version}</source>
      <target>${jdk.version}</target>
    </configuration>
      </plugin>

      <!-- embedded Jetty server, for testing -->
      <plugin>
    <groupId>org.eclipse.jetty</groupId>
    <artifactId>jetty-maven-plugin</artifactId>
    <version>9.2.11.v20150529</version>
    <configuration>
      <scanIntervalSeconds>10</scanIntervalSeconds>
      <webApp>
        <contextPath>/spring3</contextPath>
      </webApp>
    </configuration>
      </plugin>

      <!-- configure Eclipse workspace -->
      <plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-eclipse-plugin</artifactId>
    <version>2.9</version>
    <configuration>
      <downloadSources>true</downloadSources>
      <downloadJavadocs>true</downloadJavadocs>
      <wtpversion>2.0</wtpversion>
      <wtpContextName>spring3</wtpContextName>
    </configuration>
      </plugin>
    </plugins>
  </build>
</project>

now when I run mvn jetty:run or mvn clean install or mvn test, i get the following error :

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.3:testCompile (default-testCompile) on project spring-helloworld: Compilation failure: Compilation failure: [ERROR] /home/kay/Projects/Spring/MVC/HelloWorld/spring-helloworld/src/test/java/my/helloworld/HomeControllerTest.java:[3,1] package org.springframework.test.web.servlet.result.MockMvcResultMatchers does not exist [ERROR] /home/kay/Projects/Spring/MVC/HelloWorld/spring-helloworld/src/test/java/my/helloworld/HomeControllerTest.java:[7,17] package org.junit does not exist [ERROR] -> [Help 1] [ERROR] [ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch. [ERROR] Re-run Maven using the -X switch to enable full debug logging. [ERROR] [ERROR] For more information about the errors and possible solutions, please read the following articles: [ERROR] [Help 1] http://ift.tt/1aCDfYM

Earlier, it was giving error that package org was not found. What am I missing here?