How to use findNext method of org.mockito.internal.util.concurrent.WeakConcurrentMap class

Best Mockito code snippet using org.mockito.internal.util.concurrent.WeakConcurrentMap.findNext

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...186 private Map.Entry<WeakKey<K>, V> nextEntry;187 private K nextKey;188 private EntryIterator(Iterator<Map.Entry<WeakKey<K>, V>> it) {189 this.iterator = it;190 findNext();191 }192 private void findNext() {193 while (this.iterator.hasNext()) {194 Map.Entry<WeakKey<K>, V> next = this.iterator.next();195 this.nextEntry = next;196 K k = next.getKey().get();197 this.nextKey = k;198 if (k != null) {199 return;200 }201 }202 this.nextEntry = null;203 this.nextKey = null;204 }205 public boolean hasNext() {206 return this.nextKey != null;207 }208 public Map.Entry<K, V> next() {209 K k = this.nextKey;210 if (k != null) {211 try {212 return new SimpleEntry(k, this.nextEntry);213 } finally {214 findNext();215 }216 } else {217 throw new NoSuchElementException();218 }219 }220 public void remove() {221 throw new UnsupportedOperationException();222 }223 }224 private class SimpleEntry implements Map.Entry<K, V> {225 final Map.Entry<WeakKey<K>, V> entry;226 private final K key;227 private SimpleEntry(K k, Map.Entry<WeakKey<K>, V> entry2) {228 this.key = k;...

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findNext

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1public class FindNextTest {2 private static final String CLASS_NAME = "org.mockito.internal.util.concurrent.WeakConcurrentMap";3 private static final String METHOD_NAME = "findNext";4 private static final String METHOD_DESCRIPTOR = "(ILjava/​lang/​Object;Ljava/​lang/​Object;[Ljava/​lang/​Object;[Ljava/​lang/​Object;)I";5 private static final String CLASS_NAME2 = "org.mockito.internal.util.concurrent.WeakConcurrentMap$1";6 private static final String METHOD_NAME2 = "get";7 private static final String METHOD_DESCRIPTOR2 = "(Ljava/​lang/​Object;)Ljava/​lang/​Object;";8 public static void main(String[] args) throws Exception {9 ClassReader cr = new ClassReader(CLASS_NAME);10 ClassNode cn = new ClassNode();11 cr.accept(cn, 0);12 MethodNode mn = new MethodNode(Opcodes.ACC_PUBLIC + Opcodes.ACC_STATIC, METHOD_NAME, METHOD_DESCRIPTOR, null, null);13 cn.methods.add(mn);14 InsnList insns = mn.instructions;15 insns.add(new VarInsnNode(Opcodes.ILOAD, 0));16 insns.add(new VarInsnNode(Opcodes.ALOAD, 1));17 insns.add(new VarInsnNode(Opcodes.ALOAD, 2));18 insns.add(new VarInsnNode(Opcodes.ALOAD, 3));19 insns.add(new VarInsnNode(Opcodes.ALOAD, 4));20 insns.add(new MethodInsnNode(Opcodes.INVOKESTATIC, CLASS_NAME2, METHOD_NAME2, METHOD_DESCRIPTOR2));21 insns.add(new InsnNode(Opcodes.IRETURN));22 ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS);23 cn.accept(cw);24 byte[] b = cw.toByteArray();25 FileOutputStream fos = new FileOutputStream("FindNextTest.class");26 fos.write(b);27 fos.close();28 }29}30public class FindNextTestTest {31 public void testFindNext() throws Exception {32 Class<?> clazz = Class.forName("FindNextTest");33 Object instance = clazz.newInstance();34 Method method = clazz.getMethod("findNext", int.class, Object.class, Object.class, Object[].class,

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findNext

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1package com.java2novice.mockitotest;2import java.util.concurrent.atomic.AtomicInteger;3import org.junit.Test;4import org.mockito.internal.util.concurrent.WeakConcurrentMap;5import static org.junit.Assert.assertEquals;6import static org.mockito.Mockito.mock;7public class MockitoWeakConcurrentMapTest {8 public void testWeakConcurrentMap() {9 WeakConcurrentMap<Object, AtomicInteger> map = new WeakConcurrentMap<Object, AtomicInteger>();10 Object key = new Object();11 map.put(key, new AtomicInteger(1));12 assertEquals(1, map.get(key).get());13 key = null;14 System.gc();15 assertEquals(1, map.get(key).get());16 }17}

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StackOverFlow community discussions

Questions
Discussion

Mockito mock objects returns null

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mock a CrudRepository findById (&quot;111&quot;).get ()

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It really depends on GeneralConfigService#getInstance() implementation. Also you can simplify your test code a lot if you use @InjectMocks annotation.

When using MockitoJUnitRunner you don't need to initialize mocks and inject your dependencies manually:

@RunWith(MockitoJUnitRunner.class)
public class GeneralConfigServiceImplTest  {

    @InjectMocks
    private GeneralConfigService generalConfigService;

    @Mock
    private GeneralConfigDAO generalConfigDAO;

    @Test
    public void testAddGeneralConfigCallDAOSuccess() {
       // generalConfigService is already instantiated and populated with dependencies here
       ...
    }
}
https://stackoverflow.com/questions/16570029/mockito-mock-objects-returns-null

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