我在我的项目中使用了 Realm，并且试图让测试正常运行，这完全是一场噩梦。我已经把所有东西都做好了测试通过的程度，直到你开始使用 RealmResults 从数据库中获取内容。下面的代码是我获得结果的方式
private void getUser(){
realm.beginTransaction();
RealmResults<User> realmUsers = realm.where(User.class).findAll();
user = realmUsers.first();
realm.commitTransaction();
Log.d("Test", user.getFirstName() + " " + user.getLastName());
}
只需返回存储在 Realm 中的所有结果。下面是测试的完整单元测试。
@RunWith(RobolectricGradleTestRunner.class)
@Config(constants = BuildConfig.class, sdk = Build.VERSION_CODES.LOLLIPOP, manifest = "src/main/AndroidManifest.xml")
@PowerMockIgnore({"org.mockito.*", "org.robolectric.*", "android.*"})
@PrepareForTest({Realm.class, RealmConfiguration.class,
RealmQuery.class, RealmResults.class, RealmCore.class, RealmResults.class})
public class SecondActivityTest {
@Rule
public PowerMockRule rule = new PowerMockRule();
private SecondActivity activity;
private RealmResults<User> realmUsers;
@Before
public void setUp(){
MockitoAnnotations.initMocks(this);
// Setup Realm + Mock
mockStatic(Realm.class);
mockStatic(RealmConfiguration.class);
mockStatic(RealmCore.class);
mockStatic(RealmQuery.class);
final Realm mockRealm = mock(Realm.class);
doNothing().when(RealmCore.class);
RealmCore.loadLibrary(any(Context.class));
when(Realm.getDefaultInstance()).thenReturn(mockRealm);
when(mockRealm.createObject(User.class)).thenReturn(new User());
User userOne = new User("Matt", "Dunn");
User userTwo = new User("Michael", "Stoddart");
List<User> userList = Arrays.asList(userOne, userTwo);
RealmQuery<User> realmQuery = mockRealmQuery();
RealmResults<User> mockResults = mockRealmResults();
when(mockResults.iterator()).thenReturn(userList.iterator());
when(mockResults.size()).thenReturn(userList.size());
when(mockResults.first()).thenReturn(userList.get(0));
activity = Robolectric.setupActivity(SecondActivity.class);
}
@Test
public void checkActivityNotNull(){
Assert.assertNotNull(activity);
}
@SuppressWarnings("unchecked")
private <T extends RealmObject> RealmQuery<T> mockRealmQuery() {
return mock(RealmQuery.class);
}
@SuppressWarnings("unchecked")
private <T extends RealmObject> RealmResults<T> mockRealmResults() {
return mock(RealmResults.class);
}
}
然而，这仍然抛出以下异常，即使我已经遵循了领域管理员提供的指南。
https://github.com/realm/realm-java/blob/master/examples/unitTestExample/src/test/java/io/realm/examples/unittesting/ExampleActivityTest.java
Method threw 'org.mockito.exceptions.misusing.NotAMockException' exception. Cannot evaluate io.realm.Realm$$EnhancerByMockitoWithCGLIB$$61d46d71.toString()
我是否错误地嘲笑了领域结果？还是完全独立的东西？
编辑：
测试失败时提供的完整堆栈跟踪是
java.lang.NullPointerException
at com.example.mathewdunn.realmtest.activity.SecondActivity.getUser(SecondActivity.java:34)
at com.example.mathewdunn.realmtest.activity.SecondActivity.onCreate(SecondActivity.java:29)
at android.app.Activity.performCreate(Activity.java:5933)
at org.robolectric.util.ReflectionHelpers.callInstanceMethod(ReflectionHelpers.java:195)
at org.robolectric.util.ActivityController$1.run(ActivityController.java:122)
at org.robolectric.shadows.ShadowLooper.runPaused(ShadowLooper.java:304)
at org.robolectric.shadows.CoreShadowsAdapter$2.runPaused(CoreShadowsAdapter.java:45)
at org.robolectric.util.ActivityController.create(ActivityController.java:118)
at org.robolectric.util.ActivityController.create(ActivityController.java:129)
at org.robolectric.util.ActivityController.setup(ActivityController.java:210)
at org.robolectric.Robolectric.setupActivity(Robolectric.java:46)
at com.example.mathewdunn.realmtest.SecondActivityTest.setUp(SecondActivityTest.java:83)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:24)
at org.powermock.modules.junit4.rule.PowerMockStatement$1.run(PowerMockRule.java:83)
at org.powermock.reflect.internal.WhiteboxImpl.performMethodInvocation(WhiteboxImpl.java:1899)
at org.powermock.reflect.internal.WhiteboxImpl.doInvokeMethod(WhiteboxImpl.java:801)
at org.powermock.reflect.internal.WhiteboxImpl.invokeMethod(WhiteboxImpl.java:666)
at org.powermock.reflect.Whitebox.invokeMethod(Whitebox.java:401)
at org.powermock.classloading.AbstractClassloaderExecutor.getResult(AbstractClassloaderExecutor.java:69)
at org.powermock.classloading.AbstractClassloaderExecutor.executeWithClassLoader(AbstractClassloaderExecutor.java:59)
at org.powermock.classloading.SingleClassloaderExecutor.execute(SingleClassloaderExecutor.java:67)
at org.powermock.classloading.AbstractClassloaderExecutor.execute(AbstractClassloaderExecutor.java:43)
at org.powermock.modules.junit4.rule.PowerMockStatement.evaluate(PowerMockRule.java:75)
at org.robolectric.RobolectricTestRunner$2.evaluate(RobolectricTestRunner.java:251)
at org.robolectric.RobolectricTestRunner.runChild(RobolectricTestRunner.java:188)
at org.robolectric.RobolectricTestRunner.runChild(RobolectricTestRunner.java:54)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.robolectric.RobolectricTestRunner$1.evaluate(RobolectricTestRunner.java:152)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:119)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:42)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:234)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:74)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:144)
调试测试时出现 NotAMock 异常。
编辑编辑：
进行一些更改后，现在将引发替代异常。
com.thoughtworks.xstream.converters.ConversionException: Cannot convert type org.apache.tools.ant.Project to type org.apache.tools.ant.Project
---- Debugging information ----
message : Cannot convert type org.apache.tools.ant.Project to type org.apache.tools.ant.Project
class : org.apache.tools.ant.Project$1
required-type : org.apache.tools.ant.Project$1
converter-type : com.thoughtworks.xstream.converters.reflection.ReflectionConverter
path : /org.powermock.modules.junit4.rule.PowerMockStatement$1/outer-class/fNext/next/outer-class/outer-class/dependencyResolver/dependencyResolver/project/isLoggingMessage/outer-class
line number : 230
class[1] : org.apache.tools.ant.Project
class[2] : org.robolectric.internal.dependency.MavenDependencyResolver
class[3] : org.robolectric.internal.dependency.CachedDependencyResolver
class[4] : org.robolectric.RobolectricGradleTestRunner
class[5] : org.robolectric.RobolectricTestRunner$HelperTestRunner
class[6] : org.robolectric.RobolectricTestRunner$HelperTestRunner$1
class[7] : org.junit.internal.runners.statements.RunBefores
class[8] : org.powermock.modules.junit4.rule.PowerMockStatement
class[9] : org.powermock.modules.junit4.rule.PowerMockStatement$1
version : not available
-------------------------------
at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.doUnmarshal(AbstractReflectionConverter.java:456)
at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.unmarshal(AbstractReflectionConverter.java:281)
at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:72)
at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(AbstractReferenceUnmarshaller.java:70)
at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:66)
at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.unmarshallField(AbstractReflectionConverter.java:503)
at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.doUnmarshal(AbstractReflectionConverter.java:429)
at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.unmarshal(AbstractReflectionConverter.java:281)
at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:72)
at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(AbstractReferenceUnmarshaller.java:70)
at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:66)
at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.unmarshallField(AbstractReflectionConverter.java:503)
at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.doUnmarshal(AbstractReflectionConverter.java:429)
at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.unmarshal(AbstractReflectionConverter.java:281)
at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:72)
at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(AbstractReferenceUnmarshaller.java:70)
at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:66)
at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.unmarshallField(AbstractReflectionConverter.java:503)
at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.doUnmarshal(AbstractReflectionConverter.java:429)
at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.unmarshal(AbstractReflectionConverter.java:281)
at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:72)
at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(AbstractReferenceUnmarshaller.java:70)
at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:66)
at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.unmarshallField(AbstractReflectionConverter.java:503)
at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.doUnmarshal(AbstractReflectionConverter.java:429)
at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.unmarshal(AbstractReflectionConverter.java:281)
at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:72)
at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(AbstractReferenceUnmarshaller.java:70)
at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:66)
at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.unmarshallField(AbstractReflectionConverter.java:503)
at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.doUnmarshal(AbstractReflectionConverter.java:429)
at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.unmarshal(AbstractReflectionConverter.java:281)
at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:72)
at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(AbstractReferenceUnmarshaller.java:70)
at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:66)
at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.unmarshallField(AbstractReflectionConverter.java:503)
at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.doUnmarshal(AbstractReflectionConverter.java:429)
at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.unmarshal(AbstractReflectionConverter.java:281)
at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:72)
at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(AbstractReferenceUnmarshaller.java:70)
at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:66)
at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.unmarshallField(AbstractReflectionConverter.java:503)
at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.doUnmarshal(AbstractReflectionConverter.java:429)
at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.unmarshal(AbstractReflectionConverter.java:281)
at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:72)
at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(AbstractReferenceUnmarshaller.java:70)
at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:66)
at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.unmarshallField(AbstractReflectionConverter.java:503)
at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.doUnmarshal(AbstractReflectionConverter.java:429)
at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.unmarshal(AbstractReflectionConverter.java:281)
at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:72)
at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(AbstractReferenceUnmarshaller.java:70)
at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:66)
at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.unmarshallField(AbstractReflectionConverter.java:503)
at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.doUnmarshal(AbstractReflectionConverter.java:429)
at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.unmarshal(AbstractReflectionConverter.java:281)
at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:72)
at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(AbstractReferenceUnmarshaller.java:70)
at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:66)
at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:50)
at com.thoughtworks.xstream.core.TreeUnmarshaller.start(TreeUnmarshaller.java:134)
at com.thoughtworks.xstream.core.AbstractTreeMarshallingStrategy.unmarshal(AbstractTreeMarshallingStrategy.java:32)
at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:1230)
at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:1214)
at com.thoughtworks.xstream.XStream.fromXML(XStream.java:1085)
at com.thoughtworks.xstream.XStream.fromXML(XStream.java:1076)
at org.powermock.classloading.DeepCloner.clone(DeepCloner.java:55)
at org.powermock.classloading.AbstractClassloaderExecutor.executeWithClassLoader(AbstractClassloaderExecutor.java:56)
at org.powermock.classloading.SingleClassloaderExecutor.execute(SingleClassloaderExecutor.java:67)
at org.powermock.classloading.AbstractClassloaderExecutor.execute(AbstractClassloaderExecutor.java:43)
at org.powermock.modules.junit4.rule.PowerMockStatement.evaluate(PowerMockRule.java:75)
at org.robolectric.RobolectricTestRunner$2.evaluate(RobolectricTestRunner.java:265)
at org.robolectric.RobolectricTestRunner.runChild(RobolectricTestRunner.java:191)
at org.robolectric.RobolectricTestRunner.runChild(RobolectricTestRunner.java:56)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.robolectric.RobolectricTestRunner$1.evaluate(RobolectricTestRunner.java:157)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:119)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:42)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:234)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:74)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:144)
干杯
不完整的
模拟
您在 Realm 测试示例中缺少以下几行：
// The for(...) loop in Java needs an iterator, so we're giving it one that has items,
// since the mock RealmResults does not provide an implementation. Therefore, anytime
// anyone asks for the RealmResults Iterator, give them a functioning iterator from the
// ArrayList of Persons we created above. This will allow the loop to execute.
when(people.iterator()).thenReturn(personList.iterator());
// Return the size of the mock list.
when(people.size()).thenReturn(personList.size());
解释在代码注释中 - 基本上 RealmResults 就像一个 Realm 的"游标"，本身不包含任何数据，而是作为存储在 Realm 中的对象的代理。
考虑到这个事实，一个模拟实例没有任何迭代器，很明显，你必须将这个 RealmResults 上的迭代重定向到一个不同的、功能齐全的List实例 -userList在你的例子中：
when(mockResults.iterator()).thenReturn(userList.iterator());
when(mockResults.size()).thenReturn(userList.size());
这将允许您迭代并获取模拟RealmResults实例的大小。
由于您在getUser()方法中调用 RealmResults 上的first()，因此您也需要模拟此方法：
when(mockResults.first()).thenReturn(userList.get(0));
另请注意，在getUser()方法中调用realm.beginTransaction()和realm.commitTransaction()是多余的，因为您不执行任何写入。您可以安全地删除它们，也可以模拟它们：
doCallRealMethod().when(mockRealm).beginTransaction();
doCallRealMethod().when(mockRealm).commitTransaction();