How to use StaticExample class of samples.singleton package

Best Powermock code snippet using samples.singleton.StaticExample

Source:StaticPartialMockingTest.java

...20import org.mockito.stubbing.Answer;21import org.powermock.core.classloader.annotations.PrepareForTest;22import org.powermock.modules.junit4.PowerMockRunner;23import samples.partialmocking.MockSelfDemo;24import samples.singleton.StaticExample;25import static org.junit.Assert.assertEquals;26import static org.junit.Assert.assertTrue;27import static org.mockito.Mockito.times;28import static org.powermock.api.mockito.PowerMockito.*;29import static org.powermock.api.support.membermodification.MemberMatcher.method;30@RunWith(PowerMockRunner.class)31@PrepareForTest({StaticExample.class, MockSelfDemo.class})32public class StaticPartialMockingTest {33    @Test34    public void spyingOnStaticMethodReturningObjectWorks() throws Exception {35        spy(StaticExample.class);36        assertTrue(Object.class.equals(StaticExample.objectMethod().getClass()));37        when(StaticExample.class, "privateObjectMethod").thenReturn("Hello static");38        assertEquals("Hello static", StaticExample.objectMethod());39        /*40		 * privateObjectMethod should be invoked twice, once at "assertTrue" and41		 * once above.42		 */43        verifyPrivate(StaticExample.class, times(2)).invoke("privateObjectMethod");44    }45    @Test46    public void partialMockingOfStaticMethodReturningObjectWorks() throws Exception {47        spy(StaticExample.class);48        assertTrue(Object.class.equals(StaticExample.objectMethod().getClass()));49        doReturn("Hello static").when(StaticExample.class, "privateObjectMethod");50        assertEquals("Hello static", StaticExample.objectMethod());51		/*52		 * privateObjectMethod should be invoked twice, once at "assertTrue" and53		 * once above.54		 */55        verifyPrivate(StaticExample.class, times(2)).invoke("privateObjectMethod");56    }57    @Test58    public void partialPrivateMockingWithAnswerOfStaticMethodReturningObjectWorks() throws Exception {59        spy(StaticExample.class);60        assertTrue(Object.class.equals(StaticExample.objectMethod().getClass()));61        doAnswer(new Answer<String>() {62            public String answer(InvocationOnMock invocation) throws Throwable {63                return "Hello static";64            }65        }).when(StaticExample.class, "privateObjectMethod");66        assertEquals("Hello static", StaticExample.objectMethod());67		/*68		 * privateObjectMethod should be invoked twice, once at "assertTrue" and69		 * once above.70		 */71        verifyPrivate(StaticExample.class, times(2)).invoke("privateObjectMethod");72    }73    @Test74    public void spyingOnStaticFinalMethodReturningObjectWorks() throws Exception {75        spy(StaticExample.class);76        assertTrue(Object.class.equals(StaticExample.objectFinalMethod().getClass()));77        when(StaticExample.class, "privateObjectFinalMethod").thenReturn("Hello static");78        assertEquals("Hello static", StaticExample.objectFinalMethod());79        verifyPrivate(StaticExample.class, times(2)).invoke("privateObjectFinalMethod");80    }81    @Test82    public void partialMockingOfStaticFinalMethodReturningObjectWorks() throws Exception {83        spy(StaticExample.class);84        assertTrue(Object.class.equals(StaticExample.objectFinalMethod().getClass()));85        doReturn("Hello static").when(StaticExample.class, "privateObjectFinalMethod");86        assertEquals("Hello static", StaticExample.objectFinalMethod());87        verifyPrivate(StaticExample.class, times(2)).invoke("privateObjectFinalMethod");88    }89    @Test(expected = ArrayStoreException.class)90    public void spyingOnStaticVoidMethodReturningObjectWorks() throws Exception {91        spy(StaticExample.class);92        StaticExample.voidMethod();93        when(StaticExample.class, "privateVoidMethod").thenThrow(new ArrayStoreException());94        StaticExample.voidMethod();95    }96    @Test(expected = ArrayStoreException.class)97    public void partialMockingOfStaticVoidMethodReturningObjectWorks() throws Exception {98        spy(StaticExample.class);99        StaticExample.voidMethod();100        doThrow(new ArrayStoreException()).when(StaticExample.class, "privateVoidMethod");101        StaticExample.voidMethod();102    }103    @Test(expected = ArrayStoreException.class)104    public void spyingOnStaticFinalVoidMethodReturningObjectWorks() throws Exception {105        spy(StaticExample.class);106        StaticExample.voidFinalMethod();107        when(StaticExample.class, "privateVoidFinalMethod").thenThrow(new ArrayStoreException());108        StaticExample.voidFinalMethod();109    }110    @Test(expected = ArrayStoreException.class)111    public void partialMockingOfStaticFinalVoidMethodReturningObjectWorks() throws Exception {112        spy(StaticExample.class);113        StaticExample.voidFinalMethod();114        doThrow(new ArrayStoreException()).when(StaticExample.class, "privateVoidFinalMethod");115        StaticExample.voidFinalMethod();116    }117    @Test118    public void partialMockingOfPublicStaticVoidWorks() throws Exception {119        spy(StaticExample.class);120        // Given121        doNothing().when(StaticExample.class);122        StaticExample.staticVoidMethod();123        // When124        StaticExample.staticVoidMethod();125        // Then126        verifyStatic(times(1));127        StaticExample.staticVoidMethod();128    }129    @Test130    public void partialMockingOfPublicStaticFinalVoidWorks() throws Exception {131        spy(StaticExample.class);132        doNothing().when(StaticExample.class);133        StaticExample.staticFinalVoidMethod();134        StaticExample.staticFinalVoidMethod();135    }136    @Test137    public void partialMockingOfNonVoidPublicStaticMethodsWorks() throws Exception {138        spy(StaticExample.class);139        doReturn("something").when(StaticExample.class);140        StaticExample.staticMethodReturningString();141        assertEquals("something", StaticExample.staticMethodReturningString());142    }143    @Test144    public void partialMockingWithAnswerOfNonVoidPublicStaticMethodsWorks() throws Exception {145        spy(StaticExample.class);146        doAnswer(new Answer<String>() {147            public String answer(InvocationOnMock invocation) throws Throwable {148                return "something";149            }150        }).when(StaticExample.class);151        StaticExample.staticMethodReturningString();152        assertEquals("something", StaticExample.staticMethodReturningString());153    }154    @Test155    public void partialMockingOfPublicStaticMethodsWorks() throws Exception {156        spy(MockSelfDemo.class);157        when(MockSelfDemo.class, method(MockSelfDemo.class, "methodToBeStubbed")).withNoArguments().thenReturn(2);158        int result = MockSelfDemo.getSomething();159        assertEquals(4, result);160    }161    @Test162    public void partialMockingOfPublicStaticMethodsWorksWhenUsingDoReturn() throws Exception {163        spy(MockSelfDemo.class);164        doReturn(2).when(MockSelfDemo.class);165        MockSelfDemo.methodToBeStubbed();166        int result = MockSelfDemo.getSomething();...

Source:VerifyZeroInteractionsTest.java

...22import org.mockito.exceptions.verification.NoInteractionsWanted;23import org.powermock.core.classloader.annotations.PrepareForTest;24import org.powermock.modules.junit4.PowerMockRunner;25import samples.Service;26import samples.singleton.StaticExample;27import static org.assertj.core.api.Java6Assertions.assertThat;28import static org.assertj.core.api.Java6Assertions.assertThatThrownBy;29import static org.assertj.core.api.Assertions.catchThrowable;30import static org.powermock.api.mockito.PowerMockito.mock;31import static org.powermock.api.mockito.PowerMockito.mockStatic;32import static org.powermock.api.mockito.PowerMockito.verifyZeroInteractions;33@RunWith(PowerMockRunner.class)34@PrepareForTest(StaticExample.class)35public class VerifyZeroInteractionsTest {36    37    @Test38    public void should_throw_verification_exception_in_case_if_static_method_is_called() {39        mockStatic(StaticExample.class);40        41        StaticExample.staticMethodReturningString();42        43        assertThatThrownBy(new ThrowingCallable() {44            @Override45            public void call() throws Throwable {46                verifyZeroInteractions(StaticExample.class);47            }48        }).as("Verify Exception is thrown.")49          .isInstanceOf(NoInteractionsWanted.class)50          .hasMessageContaining("No interactions");51    }52    53    @Test54    public void should_throw_verification_exception_in_case_if_instance_method_called() {55        final Service mock = mock(Service.class);56        57        mock.getServiceMessage();58        59        assertThatThrownBy(new ThrowingCallable() {60            @Override61            public void call() throws Throwable {62                verifyZeroInteractions(mock);63            }64        }).as("Verify Exception is thrown.")65          .isInstanceOf(NoInteractionsWanted.class)66          .hasMessageContaining("No interactions");67    }68    69    @Test70    public void should_not_throw_verification_exception_in_case_if_no_methods_are_called_for_static_mock() {71        mockStatic(StaticExample.class);72        73        final Throwable throwable = catchThrowable(new ThrowingCallable() {74            @Override75            public void call() throws Throwable {76                verifyZeroInteractions(StaticExample.class);77            }78        });79        80        assertThat(throwable)81            .as("Verify Exception is not thrown.")82            .isNull();83    }84    85    @Test86    public void should_not_throw_verification_exception_in_case_if_no_methods_are_called_for_instance_mock() {87        final Service mock = mock(Service.class);88    89        final Throwable throwable = catchThrowable(new ThrowingCallable() {90            @Override...

StaticExample

Using AI Code Generation

1import samples.singleton.StaticExample;2{3    public static void main(String[] args)4    {5        StaticExample obj = new StaticExample();6        obj.printMessage();7    }8}9import samples.singleton.SingletonExample;10{11    public static void main(String[] args)12    {13        SingletonExample obj = SingletonExample.getInstance();14        obj.printMessage();15    }16}17package samples.singleton;18{19    public static void printMessage()20    {21        System.out.println("Hello from StaticExample class");22    }23}24package samples.singleton;25{26    private static SingletonExample obj = new SingletonExample();27    private SingletonExample()28    {29    }30    public static SingletonExample getInstance()31    {32        return obj;33    }34    public void printMessage()35    {36        System.out.println("Hello from SingletonExample class");37    }38}39Static methods and variables are shared by all instances of a class. In the above example, StaticExample class has a static method printMessage() which can be called by any instance of this class. In the 1.java file, we are creating an instance of StaticExample class and calling printMessage() method on it. Since printMessage() is a static method, it can be called without creating any instance of the class. So, we can directly call StaticExample.printMessage() method. The output of the above example is:40SingletonExample class has a private constructor and a static method getInstance() which returns the instance of this class. In the 2.java file, we are calling getInstance() method on the SingletonExample class to get the instance of this class. Since getInstance() is a static method, it can be called without creating any instance of the class. So, we can directly call SingletonExample.getInstance() method. The output of the above example is:41Static methods and variables are shared by all instances of a class. In the above example, StaticExample class has a static method printMessage() which can be called by any instance of this class. In the 1.java file, we are creating an instance of StaticExample class and calling print

StaticExample

Using AI Code Generation

1import samples.singleton.StaticExample;2public class StaticExampleUser {3  public static void main(String[] args) {4    StaticExample se = new StaticExample();5    se.print();6  }7}8package samples.singleton;9public class StaticExample {10  public void print() {11    System.out.println("Hello World!");12  }13}14import samples.singleton.StaticExample;15public class StaticExampleUser {16  public static void main(String[] args) {17    StaticExample.print();18  }19}20package samples.singleton;21public class StaticExample {22  public static void print() {23    System.out.println("Hello World!");24  }25}26import samples.singleton.StaticExample;27public class StaticExampleUser {28  public static void main(String[] args) {29    StaticExample se = new StaticExample();30    se.print();31  }32}33package samples.singleton;34public class StaticExample {35  private static StaticExample se = new StaticExample();36  private StaticExample() {37  }38  public static StaticExample getInstance() {39    return se;40  }41  public void print() {42    System.out.println("Hello World!");43  }44}45import samples.singleton.StaticExample;46public class StaticExampleUser {47  public static void main(String[] args) {48    StaticExample se = StaticExample.getInstance();49    se.print();50  }51}52package samples.singleton;53public class StaticExample {54  private static StaticExample se = new StaticExample();55  private StaticExample() {56  }57  public static StaticExample getInstance() {58    return se;59  }60  public void print() {61    System.out.println("Hello World!");62  }63}64import samples.singleton.StaticExample;65public class StaticExampleUser {66  public static void main(String[] args) {67    StaticExample se = StaticExample.getInstance();68    se.print();69  }70}71package samples.singleton;72public class StaticExample {73  private static StaticExample se = new StaticExample();74  private int i;75  private StaticExample() {76    i = 0;77  }78  public static StaticExample getInstance() {79    return se;80  }81  public void print() {82    System.out.println("Hello World! " +

StaticExample

Using AI Code Generation

1import samples.singleton.StaticExample;2public class StaticExampleUser {3   public static void main(String args[]) {4      StaticExample object1 = new StaticExample();5      StaticExample object2 = new StaticExample();6      object1.x = 10;7      object2.x = 20;8      System.out.println("object1.x = " + object1.x);9      System.out.println("object2.x = " + object2.x);10      object1.x = 30;11      System.out.println("object1.x = " + object1.x);12      System.out.println("object2.x = " + object2.x);13   }14}

StaticExample

Using AI Code Generation

1package samples.singleton;2import samples.singleton.StaticExample;3public class StaticExampleUser {4    public static void main(String args[]) {5        StaticExample se = new StaticExample();6        se.print();7    }8}9package samples.singleton;10import samples.singleton.SingletonExample;11public class SingletonExampleUser {12    public static void main(String args[]) {13        SingletonExample se = SingletonExample.getInstance();14        se.print();15    }16}17package samples.singleton;18import samples.singleton.SingletonExample;19public class SingletonExampleUser {20    public static void main(String args[]) {21        SingletonExample se = new SingletonExample();22        se.print();23    }24}25In this file, we are trying to create an object of SingletonExample class. Since the constructor is private, we cannot create an object of that class. But, the print() method is static. So, we can call the print() method without creating an object of th

StaticExample

Using AI Code Generation

1package samples.singleton;2public class StaticExample {3    public static void main(String[] args) {4        SingletonClass singletonClass = SingletonClass.getSingletonClass();5        System.out.println(singletonClass);6    }7}8package samples.singleton;9public class SingletonClass {10    private static SingletonClass singletonClass = new SingletonClass();11    private SingletonClass() {12    }13    public static SingletonClass getSingletonClass() {14        return singletonClass;15    }16}17package samples.singleton;18public class SingletonClass {19    private static SingletonClass singletonClass;20    static {21        singletonClass = new SingletonClass();22    }23    private SingletonClass() {24    }25    public static SingletonClass getSingletonClass() {26        return singletonClass;27    }28}29package samples.singleton;30public class SingletonClass {31    private static SingletonClass singletonClass;32    static {33        singletonClass = new SingletonClass();34    }35    private SingletonClass() {36    }37    public static synchronized SingletonClass getSingletonClass() {38        return singletonClass;39    }40}41package samples.singleton;42public class SingletonClass {43    private static SingletonClass singletonClass;44    static {45        singletonClass = new SingletonClass();46    }47    private SingletonClass() {48    }49    public static SingletonClass getSingletonClass() {50        if (singletonClass == null) {51            synchronized (SingletonClass.class) {52                if (singletonClass == null) {53                    singletonClass = new SingletonClass();54                }55            }56        }57        return singletonClass;58    }59}60package samples.singleton;61public class SingletonClass {62    private static volatile SingletonClass singletonClass;63    static {64        singletonClass = new SingletonClass();65    }66    private SingletonClass() {67    }68    public static SingletonClass getSingletonClass() {69        if (singletonClass == null) {70            synchronized (SingletonClass.class) {71                if (singletonClass == null) {

StaticExample

Using AI Code Generation

1package samples.singleton;2import java.util.*;3public class StaticExample {4    public static void main(String args[]) {5        Scanner sc = new Scanner(System.in);6        System.out.println("Enter the number of students : ");7        int n = sc.nextInt();8        Student s[] = new Student[n];9        for(int i=0;i<n;i++) {10            s[i] = new Student();11            s[i].getDetails();12        }13        System.out.println("The details of the students are : ");14        for(int i=0;i<n;i++) {15            s[i].displayDetails();16        }17    }18}19package samples.singleton;20import java.util.*;21public class Student {22    private static String college = "XYZ";23    private String name;24    private int rollNo;25    public void getDetails() {26        Scanner sc = new Scanner(System.in);27        System.out.println("Enter the name of the student : ");28        name = sc.nextLine();29        System.out.println("Enter the roll number of the student : ");30        rollNo = sc.nextInt();31    }32    public void displayDetails() {33        System.out.println("Name : "+name);34        System.out.println("Roll number : "+rollNo);35        System.out.println("College : "+college);36    }37}38Java Program to demonstrate the use of static import39Java Program to demonstrate the use of static import

StaticExample

Using AI Code Generation

1package samples.singleton;2import samples.singleton.StaticExample;3public class StaticExampleUser {4	public static void main(String[] args) {5		StaticExample se = new StaticExample();6		System.out.println("StaticExampleUser: se.i = " + se.i);7		StaticExample.sei = 10;8		System.out.println("StaticExampleUser: StaticExample.sei = " + StaticExample.sei);9	}10}11package samples.singleton;12import samples.singleton.StaticExample;13public class StaticExampleUser2 {14	public static void main(String[] args) {15		StaticExample se = new StaticExample();16		System.out.println("StaticExampleUser2: se.i = " + se.i);17		StaticExample.sei = 20;18		System.out.println("StaticExampleUser2: StaticExample.sei = " + StaticExample.sei);19	}20}21package samples.singleton;22import samples.singleton.StaticExample;23public class StaticExampleUser3 {24	public static void main(String[] args) {25		StaticExample se = new StaticExample();26		System.out.println("StaticExampleUser3: se.i = " + se.i);27		StaticExample.sei = 30;28		System.out.println("StaticExampleUser3: StaticExample.sei = " + StaticExample.sei);29	}30}

StaticExample

Using AI Code Generation

1import samples.singleton.StaticExample;2{3public static void main(String[] args)4{5StaticExample obj = new StaticExample();6obj.display();7}8}9package samples.singleton;10{11{12System.out.println("Static block called");13}14public static void display()15{16System.out.println("Static method called");17}18public static String str = "Static variable called";19}20import samples.singleton.StaticExample;21{22public static void main(String[] args)23{24System.out.println(StaticExample.str);25}26}27package samples.singleton;28{29{30System.out.println("Static block called");31}32public static String str = "Static variable called";33}34import samples.singleton.StaticExample;35{36public static void main(String[] args)37{38StaticExample.display();39}40}41package samples.singleton;42{43{44System.out.println("Static block called");45}46public static void display()47{48System.out.println("Static method called");49}50}51import samples.singleton.StaticExample;52{53public static void main(String[] args)54{55StaticExample.display();56System.out.println(StaticExample.str);57}58}59package samples.singleton;60{61{62System.out.println("Static block called");63}64public static void display()65{

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