我无法从先前提出的问题中找到错误的原因，因为它们与“ @Test”（不允许自定义数据类型）有关。
我有一个程序，该程序接受String类型的输入（通常是一个文本块），并以List的形式返回输入的句子。为了正确测试该程序，我尝试以列表的形式存储我的输入和预期的输出（将与程序的输出进行比较，以达到测试目的）。此处，DataStructure类包含2个属性：字符串类型属性和列表类型属性。
总共，我有一些有关程序本身的必要类，SentenceSplitterTest类，DataStructure类和Collection类。在Collection类中，我处理上述List的加载过程。我基本上会执行一些文件操作，并将输入和期望的输出存储在Collection类中。以下是我的ProgramTest.java文件的内容。
package Classes;
import org.junit.Before;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.MethodSource;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import static org.junit.jupiter.api.Assertions.assertEquals;
@RunWith(Parameterized.class)
public class SentenceSplitterTest {
private String input;
private List<String> output = new ArrayList<>();
private SentenceSplitter sentencesplitter;
private static CollectionClass collectionClass;
static {
try {
collectionClass = new CollectionClass();
} catch (IOException e) {
e.printStackTrace();
}
}
public SentenceSplitterTest(String input, List<String> output) {
super();
this.input = input;
this.output = output;
}
@Before
public void initialize() throws IOException {
sentencesplitter = new SentenceSplitter();
}
@ParameterizedTest
@MethodSource("data")
public void testSentenceSplitterTest() {
System.out.println("Expected output: " + output);
assertEquals(output, sentencesplitter.sentenceSplit(input));
}
public static Collection data() {
return collectionClass.getContent();
}
}
如您所见，我使用@MethodSource（“ data”）设置参数。我的测试屏幕看起来像this
我在屏幕快照中收到InitializationError的以下错误：
java.lang.Exception：类上没有公共静态参数方法 Classes.SentenceSplitterTest
对于屏幕快照中的每个元素，我都会收到以下错误消息：
org.junit.jupiter.api.extension.ParameterResolutionException：否 在参数注册为参数[java.lang.String arg0]的ParameterResolver 可执行文件[公共 Classes.SentenceSplitterTest（java.lang.String，java.util.List）]。 我找不到解决该问题的方法。请帮忙。
编辑1：要求我共享CollectionClass类。
package Classes;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.List;
import static java.nio.file.Files.readAllLines;
public class CollectionClass {
private static List<DataStructure> collection = new ArrayList<>();
public List<DataStructure> getContent() {
return collection;
}
public CollectionClass() throws IOException {
List<String> inputs = readAllLines(Paths.get("inputs.txt"), StandardCharsets.UTF_8);
List<String> outputs = readAllLines(Paths.get("outputs.txt"), StandardCharsets.UTF_8);
int i = 0;
int j = 0;
int ctr = 0;
while(i< inputs.size() || j< outputs.size()) {
DataStructure structure = new DataStructure();
String inputIncoming = null;
List<String> outputIncoming = new ArrayList<String>();
if(i< inputs.size()) {
if(!inputs.get(i).equals("-")) {
// nothing
}
else {
i++;
inputIncoming = inputs.get(i);
structure.string = inputIncoming;
}
}
if(j< outputs.size()) {
if(!outputs.get(j).equals("-") && !outputs.get(j).equals("--")) {
// nothing
}
else {
if(outputs.get(j).equals("-")) {
j++;
outputIncoming.add(outputs.get(j));
structure.listOfString = outputIncoming;
}
else if(outputs.get(j).equals("--")) {
j++;
outputIncoming.add(outputs.get(j));
j++;
outputIncoming.add(outputs.get(j));
structure.listOfString = outputIncoming;
}
}
}
collection.add(ctr,structure);
i++;
j++;
ctr++;
}
for(DataStructure structure: collection) {
System.out.println(structure.string);
System.out.println(structure.listOfString);
}
}
}
我也想添加DataStructure类。
package Classes;
import java.util.ArrayList;
import java.util.List;
public class DataStructure {
public String string;
public List<String> listOfString = new ArrayList<>();
}
编辑2：我被要求放入stacktrace。在这里。
java.lang.NullPointerException
at Classes.SentenceSplitterTest.testSentenceSplitterTest(SentenceSplitterTest.java:46)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:564)
at org.junit.platform.commons.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:389)
at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:115)
at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$invokeTestMethod$6(TestMethodTestDescriptor.java:167)
at org.junit.jupiter.engine.execution.ThrowableCollector.execute(ThrowableCollector.java:40)
at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.invokeTestMethod(TestMethodTestDescriptor.java:163)
at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:110)
at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:57)
at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.lambda$execute$3(HierarchicalTestExecutor.java:83)
at org.junit.platform.engine.support.hierarchical.SingleTestExecutor.executeSafely(SingleTestExecutor.java:66)
at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:77)
at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.lambda$null$0(HierarchicalTestExecutor.java:85)
at org.junit.jupiter.engine.descriptor.TestTemplateTestDescriptor.execute(TestTemplateTestDescriptor.java:114)
at org.junit.jupiter.engine.descriptor.TestTemplateTestDescriptor.lambda$execute$2(TestTemplateTestDescriptor.java:86)
at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183)
at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)
at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183)
at java.base/java.util.stream.ReferencePipeline$11$1.accept(ReferencePipeline.java:442)
at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)
at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)
at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)
at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183)
at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)
at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1492)
at java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:658)
at java.base/java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:274)
at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)
at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)
at java.base/java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:948)
at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484)
at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474)
at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150)
at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173)
at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497)
at java.base/java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:274)
at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)
at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)
at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)
at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1492)
at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484)
at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474)
at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150)
at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173)
at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497)
at java.base/java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:274)
at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1492)
at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484)
at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474)
at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150)
at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173)
at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497)
at org.junit.jupiter.engine.descriptor.TestTemplateTestDescriptor.execute(TestTemplateTestDescriptor.java:86)
at org.junit.jupiter.engine.descriptor.TestTemplateTestDescriptor.execute(TestTemplateTestDescriptor.java:36)
at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.lambda$execute$3(HierarchicalTestExecutor.java:83)
at org.junit.platform.engine.support.hierarchical.SingleTestExecutor.executeSafely(SingleTestExecutor.java:66)
at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:77)
at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.lambda$null$2(HierarchicalTestExecutor.java:92)
at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183)
at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177)
at java.base/java.util.Iterator.forEachRemaining(Iterator.java:133)
at java.base/java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1801)
at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484)
at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474)
at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150)
at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173)
at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497)
at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.lambda$execute$3(HierarchicalTestExecutor.java:92)
at org.junit.platform.engine.support.hierarchical.SingleTestExecutor.executeSafely(SingleTestExecutor.java:66)
at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:77)
at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.lambda$null$2(HierarchicalTestExecutor.java:92)
at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183)
at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177)
at java.base/java.util.Iterator.forEachRemaining(Iterator.java:133)
at java.base/java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1801)
at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484)
at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474)
at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150)
at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173)
at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497)
at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.lambda$execute$3(HierarchicalTestExecutor.java:92)
at org.junit.platform.engine.support.hierarchical.SingleTestExecutor.executeSafely(SingleTestExecutor.java:66)
at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:77)
at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:51)
at org.junit.platform.engine.support.hierarchical.HierarchicalTestEngine.execute(HierarchicalTestEngine.java:43)
at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:170)
at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:154)
at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:90)
at com.intellij.junit5.JUnit5IdeaTestRunner.startRunnerWithArgs(JUnit5IdeaTestRunner.java:74)
at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
答案 0 :(得分：1)
您正在混合JUnit 4和JUnit Jupiter参数化测试。在JUnit JUpiter中，没有测试运行程序，构造函数保持无参数状态，并将参数传递给测试方法（这有点类似于JUnit 4的理论）：
public class SentenceSplitterTest {
private SentenceSplitter sentencesplitter;
private static CollectionClass collectionClass;
// Initialization of CollectionClass moved here (instead of a static block) for two
// reasons:
// 1. If the initialization fails, you can't run the test anyway - better fail
// right here that print an error and continue to the test which we
// know won't work
// 2. It just looks neater
@BeforeAll
public static void initializeCollectionClass() throws IOException {
collectionClass = new CollectionClass();
}
@BeforeEach
public void initializeSentenceSplitter() throws IOException {
sentencesplitter = new SentenceSplitter();
}
@ParameterizedTest
@MethodSource("data")
public void testSentenceSplitterTest(DataStructure ds) {
String input = ds.string;
List<String> output = ds.listOfString;
assertEquals(output, sentencesplitter.sentenceSplit(input));
}
public static Stream<DataStructure> data() {
return collectionClass.getContent().stream();
}
}