所有测试方法都在构造函数中失败 [作业]

【问题标题】：All Test Methods Failing at Constructors [Homework]所有测试方法都在构造函数中失败 [作业]
【发布时间】：2017-02-02 23:59:13
【问题描述】：

我有一个超类和几个子类。出于某种原因，当我运行我的 JUnit 测试时，我尝试构建子类的所有方法都失败了，当我尝试调试它时，我收到这条错误消息，上面写着

找不到源：此类文件的 JAR 属于 JUnit 4，它不允许修改其条目上的源附件。

这是我的超级班

public class Sequence {

protected char[] seqarr;

public boolean isValidLetter(char let){
    boolean isValid = false;
    if (Character.isUpperCase(let) == true || Character.isLowerCase(let) == true){
        isValid = true;
    }
    return isValid;
}


public Sequence(char[] sarr){

    boolean check = true;
    for (int i = 0; i<sarr.length; i++){
        if (isValidLetter(sarr[i]) == false){
        check = false;
        break;
        }
    }
    if (check == true){
        seqarr = sarr;
    }

    if (check == false){
        throw new IllegalArgumentException("Invalid sequence letter for class edu.iastate.cs228.hw1.Sequence"); //Need to figure out how to make this say whatever class it came from

    }



}

public int seqLength(){
    return seqarr.length;

}

public char[] getSeq(){
    char[] seqCopy = seqarr;
    return seqCopy;

}

public String toString(){
    String stringSeq = "";
    for(int i = 0; i < seqarr.length; i++){
        stringSeq = stringSeq + seqarr[i];
    }
    return stringSeq;

}

public boolean equals(Object obj){
    boolean check = false;
    if (obj != null && (seqarr.toString().toLowerCase() == obj.toString().toLowerCase())){
        check = true;
    }
    return check;

}





}

这是我的一个子类

public class DNASequence extends Sequence {


@Override
public boolean isValidLetter(char let){
    return "aAcCgGtT".indexOf(let) != -1;
}


public DNASequence(char[] dnaarr){
    super(dnaarr);
}
}

这是子类的测试用例 公共类 DNASequenceTest {

char[] testArrOne = {'a','B','c','D'};

@Test
public void testValidLetter() {
    String msg = "Method should return true if the character is a/A, c/C, g/G, or t/T";
    DNASequence newDNASequence = new DNASequence(testArrOne);
    assertEquals(msg, true, newDNASequence.isValidLetter('a'));

    }


@Test
public void testValidLetterTwo(){
    DNASequence newDNASequence = new DNASequence(testArrOne);
    assertEquals(false, newDNASequence.isValidLetter('P'));
}



@Test
public void testConstructor(){
    String msg = "The constructor should call the super and initialize seqarr to the input if all compnents are valid.";
    DNASequence newDNASequence = new DNASequence(testArrOne);
    Sequence newSequence = new Sequence(testArrOne);
    assertArrayEquals(msg, testArrOne, newDNASequence.getSeq());
    assertArrayEquals(msg, testArrOne, newSequence.getSeq());
}
}

编辑：我的失败清单 DNA序列测试 hw1.DNASequenceTest testValidLetterTwo(hw1.DNASequenceTest) java.lang.IllegalArgumentException：edu.iastate.cs228.hw1.Sequence 类的序列字母无效

at hw1.Sequence.<init>(Sequence.java:35)

at hw1.DNASequence.<init>(DNASequence.java:13)

at hw1.DNASequenceTest.testValidLetterTwo(DNASequenceTest.java:22)

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:498)

at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)

at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)

at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)

at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)

at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)

at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)

at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)

at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)

at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)

at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)

at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)

at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)

at org.junit.runners.ParentRunner.run(ParentRunner.java:363)

at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)

at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)

at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)

at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:678)

at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)

at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)

testValidLetter(hw1.DNASequenceTest) java.lang.IllegalArgumentException：edu.iastate.cs228.hw1.Sequence 类的序列字母无效

at hw1.Sequence.<init>(Sequence.java:35)

at hw1.DNASequence.<init>(DNASequence.java:13)

at hw1.DNASequenceTest.testValidLetter(DNASequenceTest.java:14)

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:498)

at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)

at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)

at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)

at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)

at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)

at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)

at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)

at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)

at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)

at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)

at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)

at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)

at org.junit.runners.ParentRunner.run(ParentRunner.java:363)

at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)

at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)

at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)

at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:678)

at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)

at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)

testConstructor(hw1.DNASequenceTest) java.lang.IllegalArgumentException：edu.iastate.cs228.hw1.Sequence 类的序列字母无效

at hw1.Sequence.<init>(Sequence.java:35)

at hw1.DNASequence.<init>(DNASequence.java:13)

at hw1.DNASequenceTest.testConstructor(DNASequenceTest.java:31)

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:498)

at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)

at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)

at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)

at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)

at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)

at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)

at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)

at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)

at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)

at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)

at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)

at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)

at org.junit.runners.ParentRunner.run(ParentRunner.java:363)

at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)

at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)

at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)

at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:678)

at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)

at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)

【问题讨论】：

  • 失败的错误是什么？
  • 请显示准确错误
  • 当我尝试调试它时，我收到一条错误消息，提示找不到源：此类文件的 JAR 属于 JUnit 4，它不允许修改其上的源附件条目。 - 这是一个红鲱鱼。当您尝试进入您没有源代码的代码时会发生这种情况
  • 您好，我尝试复制失败跟踪但它说评论太长（我的生活）是否有其他方法可以找到错误？

标签： java junit computer-science


【解决方案1】：

问题是您总是使用testArrOne 作为DNASequence 构造函数的参数，该构造函数检查每个元素是否有效。但是B 和D 是无效 有效的，所以测试总是以IllegalArgumentException 失败。

您可以创建一个仅包含有效输入的测试数组用作参数：

char[] testArrValid = { 'a', 'G', 'c', 'T' };

...

@Test
public void testValidLetter() {
    String msg = "Method should return true if the character is a/A, c/C, g/G, or t/T";
    DNASequence newDNASequence = new DNASequence(testArrValid); // <-- use here
    assertEquals(msg, true, newDNASequence.isValidLetter('a'));
}

【讨论】：

  • 在不明确 runner 类的情况下它是如何工作的？
  • @KamyarParastesh Eclipse 为我解决了这个问题，我可以使用“作为 junit 测试运行”。我知道错误是因为我运行了代码。
【解决方案2】：

一个可能的原因是，您没有添加适当的类来运行您的 junit 测试

@RunWith(springjunit4classrunner.class)
 class DNASequenceTest {

【讨论】：

  • 感谢您的回复！它说 runwith 无法解析为一种类型，并且弹出一个框，上面写着“堆栈上的过时方法”
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