如何在测试期间使用“测试/资源”文件夹中的文件进行验证？

Question

背景：我想根据模式自动验证XML文件。为此，我在src/main/java中创建了一个maven-project和一个XMLValidator-class。

为了运行测试，我在src/test/java中创建了XMLValidatorTest。我的想法是将XML和XSD文件（我想要验证）放入src/test/resources文件夹，并按文件名“抓取”它们。但是当我运行mvn test时，找不到文件。

我的测试类：

public class XMLValidatorTest {

  XMLValidator xmlvalidator;

  // XSD is in src\test\resources\XSD\myXSD.xsd
  String xsdFileNameWithPath = "XSD\\myXSD.xsd";

  @Before
  public void setup() {
    xmlvalidator = new XMLValidator();
  }

  @Test
  public void testValidate() {

    // XML is in src\test\resources\XML\test001.xml
    String xmlFileNameWithPath = "XML\\test001.xml";


    assertTrue(xmlvalidator.validate(xmlFileNameWithPath, xsdFileNameWithPath));
  } 
}

当我运行mvn test时，我得到了一个文件找不到的异常，例如java.io.FileNotFoundException:d:\workspace_eclipse\xsdtester\xsd\myxsd.xsd-它在资源文件夹中。

我尝试了Maven（surefire）的解决方案：通过 -标记复制文件，从src/test/java复制测试资源，但没有效果。

<build>
  <testResources>
    <testResource>
      <directory>${project.basedir}/src/test/resources</directory>
    </testResource>
  </testResources>
</build>

有什么建议吗？

附注。在我的XMLValidator中，我尝试通过以下方式使用给定的文件：

Source xmlFile = new StreamSource(new File(xmlFileNameWithPath));
Source xsdFile = new StreamSource(new File(xsdFileNameWithPath));

编辑

我再次尝试使用this.getClass().getResourceAsstream()来实现Michele Sacchetti advise。

因此，为了检索XML文件，我尝试这样做

validate (String xmlFileNameWithPath, String xsdFileNameWithPath) {

  Source xmlFile;
  try {
    // give systemid according to: https://stackoverflow.com/questions/10997453/java-xml-validation-does-not-work-when-schema-comes-from-classpath
    xmlFile = new StreamSource(getClass().getResourceAsStream(xmlFileNameWithPath), getClass().getResource(xsdFileNameWithPath).toString());
  } catch (Exception e) {
    System.out.println("XML is null");
    return false;   
  } 

  // ...  further steps, trying to get the XSD and validate them
}

// XSD is in src\test\resources\XSD\myXSD.xsd
String xsdFileNameWithPath = "XSD\\myXSD.xsd";

// XML is in src\test\resources\XML\test001.xml
String xmlFileNameWithPath = "XML\\test001.xml";

validate(xmlFileNameWithPath, xsdFileNameWithPath);

但我总是得到一个NPE，然后尝试为该文件获取streamsource。

Answer 1

不要尝试通过filename访问文件，而是使用this.getClass().getResourceAsstream()方法通过类路径访问文件（必须省略启动/src/test/resources)

在示例bleow文件的下面

src/test/resources/test/test.properties

pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>test</groupId>
  <artifactId>test</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <name>test</name>
  <dependencies>
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.10</version>
        <type>jar</type>
        <scope>test</scope>
    </dependency>
  </dependencies>
</project>

测试源

package test;

import java.io.IOException;
import java.net.URISyntaxException;
import org.junit.Test;

public class ReadFileTest {


    @Test
    public void readTest() throws IOException, URISyntaxException{
        System.out.println(ReadFileTest.class.getResource("test.properties").toURI());
    }

}

mvn清洁测试输出

[INFO] Scanning for projects...
[INFO]                                                                         
[INFO] ------------------------------------------------------------------------
[INFO] Building test 0.0.1-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO] 
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ test ---
[WARNING] Using platform encoding (UTF-8 actually) to copy filtered resources, i.e. build is platform dependent!
[INFO] Copying 0 resource
[INFO] 
[INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ test ---
[INFO] Nothing to compile - all classes are up to date
[INFO] 
[INFO] --- maven-resources-plugin:2.6:testResources (default-testResources) @ test ---
[WARNING] Using platform encoding (UTF-8 actually) to copy filtered resources, i.e. build is platform dependent!
[INFO] Copying 1 resource
[INFO] 
[INFO] --- maven-compiler-plugin:3.1:testCompile (default-testCompile) @ test ---
[INFO] Nothing to compile - all classes are up to date
[INFO] 
[INFO] --- maven-surefire-plugin:2.12.4:test (default-test) @ test ---
[INFO] Surefire report directory: /Users/msacchetti/fworks/oss_projects/test/target/surefire-reports

-------------------------------------------------------
 T E S T S
-------------------------------------------------------
Running test.ReadFileTest
file:/Users/msacchetti/fworks/oss_projects/test/target/test-classes/test/test.properties
Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.037 sec

Results :

Tests run: 1, Failures: 0, Errors: 0, Skipped: 0

[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 1.318 s
[INFO] Finished at: 2016-04-26T21:36:54+02:00
[INFO] Final Memory: 10M/245M
[INFO] ------------------------------------------------------------------------

请注意，返回路径正确地进入目标文件夹，而不是在src one中