juit 用assertThat 提示我找不到符号

Question

代码如下，用的是intelij idea社区版。

import org.junit.Test;

import static org.junit.Assert.assertThat;
import static sun.nio.cs.Surrogate.is;

public class PlayerTest {
  public void should_return_3_when_status_is_3(){
        Player player = new Player();
        assertThat(player.getStatus(),is(3));
    }
}

提示错误
`找不到符号
符号： 方法 assertThat(int,boolean)
位置： 类 PlayerTest`
项目的IML文件如下

<?xml version="1.0" encoding="UTF-8"?>
<module type="JAVA_MODULE" version="4">
  <component name="NewModuleRootManager" inherit-compiler-output="true">
    <exclude-output />
    <content url="file://$MODULE_DIR$">
      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
      <sourceFolder url="file://$MODULE_DIR$/test" isTestSource="true" />
    </content>
    <orderEntry type="inheritedJdk" />
    <orderEntry type="sourceFolder" forTests="false" />
    <orderEntry type="module-library" scope="TEST">
      <library>
        <CLASSES>
          <root url="jar://$APPLICATION_HOME_DIR$/lib/junit-4.10.jar!/" />
        </CLASSES>
        <JAVADOC />
        <SOURCES />
      </library>
    </orderEntry>
  </component>
</module>