[Java][Servlet] 単体テスト用HttpSessionスタブ

HttpSessionStub.java

import javax.servlet.http.HttpSession;
public class HttpSessionStub implements HttpSession {
  private final Map<String, Object> attributes = new HashMap<String, Object>();

  @Override
  public Object getAttribute(String name) {
    return attributes.get(name);
  }

  @Override
  public void setAttribute(String name, Object value) {
    attributes.put(name, value);
  }

  @Override
  public void removeAttribute(String name) {
    attributes.remove(name);
  }

  @Override
  public Enumeration<String> getAttributeNames() {
    throw new UnsupportedOperationException();
  }

  @Override
  public long getCreationTime() {
    throw new UnsupportedOperationException();
  }

  @Override
  public String getId() {
    throw new UnsupportedOperationException();
  }

  @Override
  public long getLastAccessedTime() {
    throw new UnsupportedOperationException();
  }

  @Override
  public int getMaxInactiveInterval() {
    throw new UnsupportedOperationException();
  }

  @Override
  public ServletContext getServletContext() {
    throw new UnsupportedOperationException();
  }

  @Override
  public HttpSessionContext getSessionContext() {
    throw new UnsupportedOperationException();
  }

  @Override
  public Object getValue(String name) {
    throw new UnsupportedOperationException();
  }

  @Override
  public String[] getValueNames() {
    throw new UnsupportedOperationException();
  }

  @Override
  public void invalidate() {
    throw new UnsupportedOperationException();
  }

  @Override
  public boolean isNew() {
    throw new UnsupportedOperationException();
  }

  @Override
  public void putValue(String name, Object value) {
    throw new UnsupportedOperationException();
  }

  @Override
  public void removeValue(String name) {
    throw new UnsupportedOperationException();
  }

  @Override
  public void setMaxInactiveInterval(int arg0) {
    throw new UnsupportedOperationException();
  }

  @Test
  public void testAttribute() {
    HttpSession session = new HttpSessionStub();

    session.setAttribute("key1", "value1");
    assertEquals("value1", session.getAttribute("key1"));

    session.removeAttribute("key1");
    assertNull(session.getAttribute("key1"));
  }

  @Test
  public void testAttributeNull() {
    HttpSession session = new HttpSessionStub();

    assertNull(session.getAttribute("key1"));

    session.removeAttribute("key1");
    assertNull(session.getAttribute("key1"));
  }
}