android/testSrc/com/android/tools/idea/rendering/FileResourceRepositoryTest.java

/*
 * Copyright (C) 2013 The Android Open Source Project
 *
 * 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.android.tools.idea.rendering;

import com.google.common.io.Files;
import com.intellij.openapi.util.io.FileUtil;
import com.intellij.testFramework.PlatformTestUtil;
import junit.framework.TestCase;
import org.jetbrains.android.AndroidTestBase;
import org.jetbrains.annotations.NotNull;

import java.io.File;
import java.io.IOException;

import static com.intellij.testFramework.UsefulTestCase.assertSameElements;
import static java.io.File.separatorChar;
import static org.jetbrains.android.facet.ResourceFolderManager.EXPLODED_AAR;

public class FileResourceRepositoryTest extends TestCase {
  public void test() throws IOException {

    File dir = Files.createTempDir();
    try {
      assertNotNull(FileResourceRepository.get(dir));
      // We shouldn't clear it out immediately on GC *eligibility*:
      System.gc();
      assertNotNull(FileResourceRepository.getCached(dir));
      // However, in low memory conditions we should:
      try {
        PlatformTestUtil.tryGcSoftlyReachableObjects();
      } catch (Throwable t) {
        // The above method can throw java.lang.OutOfMemoryError; that's fine for this test
      }
      System.gc();
      assertNull(FileResourceRepository.getCached(dir));
    }
    finally {
      FileUtil.delete(dir);
    }
  }

  public void testGetAllDeclaredIds() throws IOException {
    FileResourceRepository repository = getTestRepository();
    assertSameElements(repository.getAllDeclaredIds(), "id1", "id2", "id3");
  }

  @NotNull
  static FileResourceRepository getTestRepository() throws IOException {
    String aarPath = AndroidTestBase.getTestDataPath() + separatorChar +
                     "rendering" + separatorChar +
                     EXPLODED_AAR + separatorChar +
                     "my_aar_lib" + separatorChar +
                     "res";
    return FileResourceRepository.get(new File(aarPath));
  }
}