android/testSrc/com/android/tools/idea/memorysettings/MemorySettingsRecommendationTest.java

/*
 * Copyright (C) 2019 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.memorysettings;

import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;

import com.android.tools.analytics.HostData;
import com.android.tools.analytics.stubs.StubOperatingSystemMXBean;
import com.intellij.openapi.module.Module;
import com.intellij.openapi.module.ModuleManager;
import com.intellij.openapi.project.Project;
import com.intellij.testFramework.IdeaTestCase;

public class MemorySettingsRecommendationTest extends IdeaTestCase {
  public void testRecommend() {
    assertEquals(getRecommended(1280, 5120, 20), -1);
    assertEquals(getRecommended(1280, 5120, 100), 1536);
    assertEquals(getRecommended(1280, 5120, 200), 1536);
    assertEquals(getRecommended(1280, 8192, 20), 2048);
    assertEquals(getRecommended(1280, 8192, 120), 2048);
    assertEquals(getRecommended(1280, 8192, 200), 2048);
    assertEquals(getRecommended(1280, 16 * 1024, 20), 2048);
    assertEquals(getRecommended(1280, 16 * 1024, 50), 2048);
    assertEquals(getRecommended(1280, 16 * 1024, 100), 3072);
    assertEquals(getRecommended(1280, 16 * 1024, 200), 4096);
  }

  private int getRecommended(int currentXmxInMB, int machineMemInMB, int moduleCount) {
    Project project = mock(Project.class);
    ModuleManager moduleManager = mock(ModuleManager.class);

    when(project.getComponent(ModuleManager.class)).thenReturn(moduleManager);
    Module[] modules = new Module[moduleCount];
    when(moduleManager.getModules()).thenReturn(modules);
    stubHostData(machineMemInMB);
    return MemorySettingsRecommendation.getRecommended(project, currentXmxInMB);
  }

  private void stubHostData(int machineMemInMB) {
    HostData.setOsBean(new StubOperatingSystemMXBean() {
      @Override
      public long getTotalPhysicalMemorySize() {
        return machineMemInMB * 1024 * 1024L;
      }
    });
  }
}