Java tutorial
/* * Copyright (C) 2015 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.tests.lib; import static org.junit.Assert.*; import static org.mockito.Mockito.*; import android.app.Activity; import android.app.Application; import android.bluetooth.BluetoothAdapter; import android.content.SyncResult; import android.content.SyncStats; import android.util.ArrayMap; import android.os.AsyncTask; import android.os.Debug; import android.os.PowerManager; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.junit.Ignore; import org.junit.Test; import java.lang.reflect.Field; import java.io.InputStream; import java.net.URL; public class UnitTest { @Test public void referenceProductionCode() { // Reference production code: LibFoo foo = new LibFoo(); assertEquals("library code", foo.foo()); } @Test public void mockFinalMethod() { Activity activity = mock(Activity.class); Application app = mock(Application.class); when(activity.getApplication()).thenReturn(app); assertSame(app, activity.getApplication()); verify(activity).getApplication(); verifyNoMoreInteractions(activity); } @Test public void mockFinalClass() { BluetoothAdapter adapter = mock(BluetoothAdapter.class); when(adapter.isEnabled()).thenReturn(true); assertTrue(adapter.isEnabled()); verify(adapter).isEnabled(); verifyNoMoreInteractions(adapter); } @Test public void mockInnerClass() throws Exception { PowerManager.WakeLock wakeLock = mock(PowerManager.WakeLock.class); when(wakeLock.isHeld()).thenReturn(true); assertTrue(wakeLock.isHeld()); } @Test public void aarDependencies() throws Exception { org.jdeferred.Deferred<Integer, Integer, Integer> deferred = new org.jdeferred.impl.DeferredObject<Integer, Integer, Integer>(); org.jdeferred.Promise promise = deferred.promise(); deferred.resolve(42); assertTrue(promise.isResolved()); } @Test public void exceptions() { try { ArrayMap map = new ArrayMap(); map.isEmpty(); fail(); } catch (RuntimeException e) { assertEquals(RuntimeException.class, e.getClass()); assertTrue(e.getMessage().contains("isEmpty")); assertTrue(e.getMessage().contains("not mocked")); assertTrue(e.getMessage().contains("androidstudio/not-mocked")); } try { Debug.getThreadAllocCount(); fail(); } catch (RuntimeException e) { assertEquals(RuntimeException.class, e.getClass()); assertTrue(e.getMessage().contains("getThreadAllocCount")); assertTrue(e.getMessage().contains("not mocked")); assertTrue(e.getMessage().contains("androidstudio/not-mocked")); } } @Test public void enums() throws Exception { assertNotNull(AsyncTask.Status.RUNNING); assertNotEquals(AsyncTask.Status.RUNNING, AsyncTask.Status.FINISHED); assertEquals(AsyncTask.Status.FINISHED, AsyncTask.Status.valueOf("FINISHED")); assertEquals(1, AsyncTask.Status.PENDING.ordinal()); assertEquals("RUNNING", AsyncTask.Status.RUNNING.name()); assertEquals(AsyncTask.Status.RUNNING, Enum.valueOf(AsyncTask.Status.class, "RUNNING")); AsyncTask.Status[] values = AsyncTask.Status.values(); assertEquals(3, values.length); assertEquals(AsyncTask.Status.FINISHED, values[0]); assertEquals(AsyncTask.Status.PENDING, values[1]); assertEquals(AsyncTask.Status.RUNNING, values[2]); } @Test public void instanceFields() throws Exception { SyncResult result = mock(SyncResult.class); Field statsField = result.getClass().getField("stats"); SyncStats syncStats = mock(SyncStats.class); statsField.set(result, syncStats); syncStats.numDeletes = 42; assertEquals(42, result.stats.numDeletes); } @Test public void javaResourcesOnClasspath() throws Exception { URL url = UnitTest.class.getClassLoader().getResource("lib_resource_file.txt"); assertNotNull(url); InputStream stream = UnitTest.class.getClassLoader().getResourceAsStream("lib_resource_file.txt"); assertNotNull(stream); byte[] line = new byte[1024]; assertTrue("Expected >0 bytes read from input stream", stream.read(line) > 0); String s = new String(line, "UTF-8").trim(); assertEquals("success", s); } @Test public void prodJavaResourcesOnClasspath() throws Exception { URL url = UnitTest.class.getClassLoader().getResource("lib_prod_resource_file.txt"); assertNotNull(url); InputStream stream = UnitTest.class.getClassLoader().getResourceAsStream("lib_prod_resource_file.txt"); assertNotNull(stream); byte[] line = new byte[1024]; assertTrue("Expected >0 bytes read from input stream", stream.read(line) > 0); String s = new String(line, "UTF-8").trim(); assertEquals("lib prod", s); } @Test public void prodRClass() { int id = R.string.app_name; assertTrue(id > 0); } @Test @Ignore public void thisIsIgnored() { // Just excercise more JUnit features. } @Test public void taskConfiguration() { // This property is set in build.gradle: assertEquals("bar", System.getProperty("foo")); } @Test public void commonsLogging() { Log log = LogFactory.getLog(getClass()); log.info("I can use commons-logging!"); } }