[英]mocking enum using powerMock
我正在嘗試使用Field 'fTestClass' was not found in class
模擬enum
但是Field 'fTestClass' was not found in class
運行測試時Field 'fTestClass' was not found in class
錯誤中Field 'fTestClass' was not found in class
。 我發現問題出在Junit 4.12和powermock-module-junit4 1.5.6
。 所以我現在更改為1.6.1
低於錯誤...
java.lang.ExceptionInInitializerError
at sun.reflect.GeneratedSerializationConstructorAccessor9.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Constructor.java:422)
at org.objenesis.instantiator.sun.SunReflectionFactoryInstantiator.newInstance(SunReflectionFactoryInstantiator.java:45)
at org.objenesis.ObjenesisBase.newInstance(ObjenesisBase.java:73)
at org.mockito.internal.creation.jmock.ClassImposterizer.createProxy(ClassImposterizer.java:142)
at org.mockito.internal.creation.jmock.ClassImposterizer.imposterise(ClassImposterizer.java:61)
at org.powermock.api.mockito.internal.mockcreation.MockCreator.createMethodInvocationControl(MockCreator.java:109)
at org.powermock.api.mockito.internal.mockcreation.MockCreator.mock(MockCreator.java:57)
at org.powermock.api.mockito.PowerMockito.mockStatic(PowerMockito.java:70)
at OrderEventProcessorTest.setUp(OrderEventProcessorTest.java:47)
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:497)
at org.junit.internal.runners.MethodRoadie.runBefores(MethodRoadie.java:133)
at org.junit.internal.runners.MethodRoadie.runBeforesThenTestThenAfters(MethodRoadie.java:96)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$PowerMockJUnit44MethodRunner.executeTest(PowerMockJUnit44RunnerDelegateImpl.java:294)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit47RunnerDelegateImpl$PowerMockJUnit47MethodRunner.executeTestInSuper(PowerMockJUnit47RunnerDelegateImpl.java:127)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit47RunnerDelegateImpl$PowerMockJUnit47MethodRunner.executeTest(PowerMockJUnit47RunnerDelegateImpl.java:82)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$PowerMockJUnit44MethodRunner.runBeforesThenTestThenAfters(PowerMockJUnit44RunnerDelegateImpl.java:282)
at org.junit.internal.runners.MethodRoadie.runTest(MethodRoadie.java:87)
at org.junit.internal.runners.MethodRoadie.run(MethodRoadie.java:50)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.invokeTestMethod(PowerMockJUnit44RunnerDelegateImpl.java:207)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.runMethods(PowerMockJUnit44RunnerDelegateImpl.java:146)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$1.run(PowerMockJUnit44RunnerDelegateImpl.java:120)
at org.junit.internal.runners.ClassRoadie.runUnprotected(ClassRoadie.java:34)
at org.junit.internal.runners.ClassRoadie.runProtected(ClassRoadie.java:44)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.run(PowerMockJUnit44RunnerDelegateImpl.java:122)
at org.powermock.modules.junit4.common.internal.impl.JUnit4TestSuiteChunkerImpl.run(JUnit4TestSuiteChunkerImpl.java:106)
at org.powermock.modules.junit4.common.internal.impl.AbstractCommonPowerMockRunner.run(AbstractCommonPowerMockRunner.java:53)
at org.powermock.modules.junit4.PowerMockRunner.run(PowerMockRunner.java:59)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:69)
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:497)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:144)
Caused by: java.lang.NullPointerException
基本上,我試圖模擬enum
以檢查對cassandra db
的插入,更新,刪除操作的功能。 枚舉設置了cassadra db連接。 我想對其進行模擬,因此無需連接到數據庫即可測試我的Crud功能。 請讓我知道Junit 4.12和powermock 1.6.1是否仍然存在任何版本問題。 我正在使用mockito-core 1.10.19
和maven-surefire-plugin 2.19.1
mockito-core 1.10.19
maven-surefire-plugin 2.19.1
public enum CassProvider {
INSTANCE;
private Map<String,ThreadLocal<PreparedStatement>> psMap;
private String[] hostnames;
private String username;
private String password;
private String keyspace;
private Cluster cluster;
private Session session;
private CassProvider() {
init();
psMap = createPreparedStatements();
}
private void init() {
//get host, port, user , pasword from properties file
cluster = Cluster.builder().addContactPoints(hostnames).withPort(port).withCredentials(username, password).build();
session = cluster.connect(keyspace);
}
private static Map<String,ThreadLocal<PreparedStatement>> createPreparedStatements() {
//code goes for mapping preparedStatements
return psMap;
}
public PreparedStatement getPreparedStatement(String id) {
//logic for preparedStatement
return preparedStatement;
}
public Session getSession() {
return session;
}
}
if (eventMappingType != null && processEvent) {
.......
BatchStatement batchStatement = new BatchStatement();
PreparedStatement psFieldInsert = CassProvider.INSTANCE.getPreparedStatement("INSERT_ORDERS_FV");
if (eventMappingType.getSimpleFields() != null) {
for (FieldType fieldType : eventMappingType.getSimpleFields().getField()) {
Object value = MVEL.executeExpression(fieldType.getSerializedExpr(), context);
batchStatement.add(psFieldInsert.bind(keyFields.get("orderNumber"),dateStringToDate(eventDateTime), fieldType.getValue(), value != null ? value.toString() : value));
}
}
if (eventType.compareToIgnoreCase("OrderPlaced") == 0) {
//Update the lookup table for given name 2 orders.
if (name != null && name.compareToIgnoreCase("")!=0) {
batchStatement.add(CassProvider.INSTANCE.getPreparedStatement("INSERT_ORDERS_BY_NAME").bind(name, dateStringToDate(eventDateTime), orderNumber));
}
//Update the lookup table for accIds 2 orders; not sure if we need this for now
if (accIds != null && accIds.compareToIgnoreCase("")!=0) {
batchStatement.add(CassProvider.INSTANCE.getPreparedStatement("INSERT_ORDERS_BY_ACCIDS").bind(accIds, dateStringToDate(eventDateTime), orderNumber));
}
if (SAPOrderNumber != null) {
batchStatement.add(CassProvider.INSTANCE.getPreparedStatement("INSERT_SAP_ORDER").bind(SAPOrderNumber, orderNumber));
}
}
CassProvider.INSTANCE.getSession().execute(batchStatement);
}
不確定您的Cluster.builder()方法如何工作,但我建議您進行配置,即為測試類打開它,以注入模擬的構建器,該構建器最終返回模擬的Cluster,而該集群又返回模擬的Session。 ..
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