test/com/google/inject/PreloadingTest.java

/**
 * Copyright (C) 2006 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.google.inject;

import static com.google.inject.Scopes.CONTAINER;

import junit.framework.TestCase;

/**
 * @author crazybob@google.com (Bob Lee)
 */
public class PreloadingTest extends TestCase {

  protected void tearDown() throws Exception {
    Foo.count = 0;
    Bar.count = 0;
  }

  public void testPreloadSome() throws ContainerCreationException {
    ContainerBuilder builder = createContainerBuilder();
    builder.create(false);
    assertEquals(1, Foo.count);
    assertEquals(0, Bar.count);
  }

  public void testPreloadAll() throws ContainerCreationException {
    ContainerBuilder builder = createContainerBuilder();
    builder.create(true);
    assertEquals(1, Foo.count);
    assertEquals(1, Bar.count);
  }

  private ContainerBuilder createContainerBuilder() {
    ContainerBuilder builder = new ContainerBuilder();
    builder.bind(Foo.class).in(CONTAINER).preload();
    builder.bind(Bar.class);
    return builder;
  }

  public void testInvalidPreload() {
    ContainerBuilder builder = new ContainerBuilder();
    builder.bind(Foo.class).preload();
    try {
      builder.create(false);
      fail();
    } catch (ContainerCreationException e) { /* expected */ }
  }

  static class Foo {
    static int count = 0;
    public Foo() {
      count++;
    }
  }

  @ContainerScoped
  static class Bar {
    static int count = 0;
    public Bar() {
      count++;
    }
  }
}