Isolation

IsolatedTestV1.java

package logic;

import org.junit.Assert;
import org.junit.Test;
import play.Play;

import java.util.Properties;

public class IsolatedTestV1 extends Assert {
  static {
    Play.configuration = new Properties();
  }

  @Test
  public void should_return_null_if_nothing_added() throws Exception {
    assertEquals(null, Play.configuration.getProperty("score"));
  }

  @Test
  public void should_return_what_was_added() throws Exception {
    Play.configuration.setProperty("score", "10");
    assertEquals("10", Play.configuration.getProperty("score"));
  }
}

IsolatedTestV2.java

package logic;

import org.junit.After;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
import play.Play;

import java.util.Properties;

public class IsolatedTestV2 extends Assert {

  private Properties originalProps;

  @Before
  public void setUp() throws Exception {
    originalProps = Play.configuration;
    Play.configuration = new Properties();
  }

  @After
  public void tearDown() throws Exception {
    Play.configuration = originalProps;
  }

  @Test
  public void should_return_what_was_added() throws Exception {
    Play.configuration.setProperty("score", "10");
    assertEquals("10", Play.configuration.getProperty("score"));
  }

  @Test
  public void should_return_null_if_nothing_added() throws Exception {
    assertEquals(null, Play.configuration.getProperty("score"));
  }

}