Here Utils.java is my class to be tested and following is the method which is called in UtilsTest class. Even if I am mocking Log.e method as shown below
@Before public void setUp() { when(Log.e(any(String.class),any(String.class))).thenReturn(any(Integer.class)); utils = spy(new Utils()); }
I am getting the following exception
java.lang.RuntimeException: Method e in android.util.Log not mocked. See http://g.co/androidstudio/not-mocked for details. at android.util.Log.e(Log.java) at com.xxx.demo.utils.UtilsTest.setUp(UtilsTest.java:41) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 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.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57) 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.junit.runners.ParentRunner.run(ParentRunner.java:363) at org.junit.runner.JUnitCore.run(JUnitCore.java:137) at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:78) at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:212) at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:68) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at com.intellij.rt.execution.application.AppMain.main(AppMain.java:140)
Mocking is done when you invoke methods of a class that has external communication like database calls or rest calls. Through mocking you can explicitly define the return value of methods without actually executing the steps of the method.
To use PowerMock with Mockito, we need to apply the following two annotations in the test: @RunWith(PowerMockRunner. class): It is the same as we have used in our previous examples. The only difference is that in the previous example we have used MockitoUnitRunner.
This worked out for me. I'm only using JUnit and I was able to mock up the Log
class without any third party lib very easy. Just create a file Log.java
inside app/src/test/java/android/util
with contents:
package android.util; public class Log { public static int d(String tag, String msg) { System.out.println("DEBUG: " + tag + ": " + msg); return 0; } public static int i(String tag, String msg) { System.out.println("INFO: " + tag + ": " + msg); return 0; } public static int w(String tag, String msg) { System.out.println("WARN: " + tag + ": " + msg); return 0; } public static int e(String tag, String msg) { System.out.println("ERROR: " + tag + ": " + msg); return 0; } // add other methods if required... }
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With