JUnit 5集合类型参数导致“@ParameterizedTest”错误

问题描述 投票：0回答：1

我无法从之前提出的问题中找到错误的原因，因为它们是关于“@Test”（它不允许自定义数据类型）。

我有一个程序，它接受一个String类型输入（通常是一个文本块），并以List的形式返回输入的句子。为了正确地测试这个程序，我尝试以List的形式存储我的输入和预期输出（将与我的程序的输出，测试的目的进行比较）。这里DataStructure类由2个属性组成：String类型属性和List类型属性。

总的来说，我有一些关于程序本身的必要类，SentenceSplitterTest类，DataStructure类和Collection类。在Collection类中，我处理上面提到的List的加载过程。我基本上做了一些文件操作，并将我的输入和预期输出存储在Collection类中。下面是我的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”）来设置我的参数。我的测试屏幕看起来像this

我在屏幕截图中遇到InitializationError的以下错误：

java.lang.Exception：类Classes.SentenceSplitterTest上没有公共静态参数方法

我在屏幕截图中的每个元素都收到以下错误：

org.junit.jupiter.api.extension.ParameterResolutionException：没有为可执行文件[public Classes.SentenceSplitterTest（java.lang.String，java.util.List）]中的参数[java.lang.String arg0]注册ParameterResolver。我无法找到解决问题的方法。请帮忙。

编辑1：我被要求分享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);
        }
    }
}

我也想添加数据结构类。

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：我被要求放置堆栈跟踪。这里是。

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)
java intellij-idea junit parameterized
1个回答
1
投票

您正在混合使用JUnit 4和JUnit Jupiter参数化测试。在JUnit JUpiter中，没有测试运行器，构造函数仍然是无参数的，你将参数传递给测试方法（有点让人联想到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();
    }
}
最新问题
© www.soinside.com 2019 - 2024. All rights reserved.