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StaticMockTest.java
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StaticMockTest.java
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/*
* Copyright (c) 2020 Mockito contributors
* This program is made available under the terms of the MIT License.
*/
package org.mockitoinline;
import static junit.framework.TestCase.assertEquals;
import static junit.framework.TestCase.assertNull;
import static junit.framework.TestCase.fail;
import static org.mockito.Mockito.times;
import java.util.concurrent.atomic.AtomicReference;
import org.junit.Rule;
import org.junit.Test;
import org.mockito.MockedStatic;
import org.mockito.Mockito;
import org.mockito.exceptions.base.MockitoException;
import org.mockito.exceptions.verification.NoInteractionsWanted;
import org.mockito.exceptions.verification.WantedButNotInvoked;
import org.mockito.junit.MockitoJUnit;
import org.mockito.junit.MockitoRule;
public final class StaticMockTest {
@Rule // Adding rule to assert properly managed life-cycle for static mocks
public MockitoRule mockitoRule = MockitoJUnit.rule();
@Test
public void testStaticMockSimple() {
assertEquals("foo", Dummy.foo());
try (MockedStatic<Dummy> ignored = Mockito.mockStatic(Dummy.class)) {
assertNull(Dummy.foo());
}
assertEquals("foo", Dummy.foo());
}
@Test
public void testStaticMockWithVerification() {
try (MockedStatic<Dummy> dummy = Mockito.mockStatic(Dummy.class)) {
dummy.when(Dummy::foo).thenReturn("bar");
assertEquals("bar", Dummy.foo());
dummy.verify(Dummy::foo);
}
}
@Test(expected = WantedButNotInvoked.class)
public void testStaticMockWithVerificationFailed() {
try (MockedStatic<Dummy> dummy = Mockito.mockStatic(Dummy.class)) {
dummy.verify(Dummy::foo);
}
}
@Test
public void testStaticMockWithMoInteractions() {
try (MockedStatic<Dummy> dummy = Mockito.mockStatic(Dummy.class)) {
dummy.when(Dummy::foo).thenReturn("bar");
dummy.verifyNoInteractions();
}
}
@Test(expected = NoInteractionsWanted.class)
public void testStaticMockWithMoInteractionsFailed() {
try (MockedStatic<Dummy> dummy = Mockito.mockStatic(Dummy.class)) {
dummy.when(Dummy::foo).thenReturn("bar");
assertEquals("bar", Dummy.foo());
dummy.verifyNoInteractions();
}
}
@Test
public void testStaticMockWithMoMoreInteractions() {
try (MockedStatic<Dummy> dummy = Mockito.mockStatic(Dummy.class)) {
dummy.when(Dummy::foo).thenReturn("bar");
assertEquals("bar", Dummy.foo());
dummy.verify(Dummy::foo);
dummy.verifyNoMoreInteractions();
}
}
@Test(expected = NoInteractionsWanted.class)
public void testStaticMockWithMoMoreInteractionsFailed() {
try (MockedStatic<Dummy> dummy = Mockito.mockStatic(Dummy.class)) {
dummy.when(Dummy::foo).thenReturn("bar");
assertEquals("bar", Dummy.foo());
dummy.verifyNoMoreInteractions();
}
}
@Test
public void testStaticMockWithDefaultAnswer() {
try (MockedStatic<Dummy> dummy = Mockito.mockStatic(Dummy.class, invocation -> "bar")) {
assertEquals("bar", Dummy.foo());
dummy.verify(Dummy::foo);
}
}
@Test
public void testStaticMockWithRealMethodCall() {
try (MockedStatic<Dummy> dummy = Mockito.mockStatic(Dummy.class)) {
dummy.when(Dummy::foo).thenCallRealMethod();
assertEquals("foo", Dummy.foo());
dummy.verify(Dummy::foo);
}
}
@Test
public void testStaticMockReset() {
try (MockedStatic<Dummy> dummy = Mockito.mockStatic(Dummy.class)) {
dummy.when(Dummy::foo).thenReturn("bar");
dummy.reset();
assertNull(Dummy.foo());
}
}
@Test
public void testStaticMockClear() {
try (MockedStatic<Dummy> dummy = Mockito.mockStatic(Dummy.class)) {
dummy.when(Dummy::foo).thenReturn("bar");
assertEquals("bar", Dummy.foo());
dummy.clearInvocations();
dummy.verifyNoInteractions();
}
}
@Test
public void testStaticMockDoesNotAffectDifferentThread() throws InterruptedException {
try (MockedStatic<Dummy> dummy = Mockito.mockStatic(Dummy.class)) {
dummy.when(Dummy::foo).thenReturn("bar");
assertEquals("bar", Dummy.foo());
dummy.verify(Dummy::foo);
AtomicReference<String> reference = new AtomicReference<>();
Thread thread = new Thread(() -> reference.set(Dummy.foo()));
thread.start();
thread.join();
assertEquals("foo", reference.get());
dummy.when(Dummy::foo).thenReturn("bar");
assertEquals("bar", Dummy.foo());
dummy.verify(times(2), Dummy::foo);
}
}
@Test
public void testStaticMockCanCoexistWithMockInDifferentThread() throws InterruptedException {
try (MockedStatic<Dummy> dummy = Mockito.mockStatic(Dummy.class)) {
dummy.when(Dummy::foo).thenReturn("bar");
assertEquals("bar", Dummy.foo());
dummy.verify(Dummy::foo);
AtomicReference<String> reference = new AtomicReference<>();
Thread thread = new Thread(() -> {
try (MockedStatic<Dummy> dummy2 = Mockito.mockStatic(Dummy.class)) {
dummy2.when(Dummy::foo).thenReturn("qux");
reference.set(Dummy.foo());
}
});
thread.start();
thread.join();
assertEquals("qux", reference.get());
dummy.when(Dummy::foo).thenReturn("bar");
assertEquals("bar", Dummy.foo());
dummy.verify(times(2), Dummy::foo);
}
}
@Test(expected = MockitoException.class)
public void testStaticMockMustBeExclusiveInScopeWithinThread() {
try (
MockedStatic<Dummy> dummy = Mockito.mockStatic(Dummy.class);
MockedStatic<Dummy> duplicate = Mockito.mockStatic(Dummy.class)
) {
fail("Not supposed to allow duplicates");
}
}
static class Dummy {
static String foo() {
return "foo";
}
}
}