Getting “testng.xml is not a valid file” error in Jenkins

Question

I’m getting the following error when trying to run a Selenium/TestNg test from Jenkins.

[ERROR] Suite file /development/apps/config/jenkins/jobs/teste-automatizado/workspace/Abc/testng.xml is not a valid file

Below are my POM and testng.xml files. Am I doing something wrong here? Any help? Thanks in advance.

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>br.com.aoki</groupId>
      <artifactId>Juvo</artifactId>
      <version>0.0.1-SNAPSHOT</version>

      <properties>
            <project.build.sourceEncoding>ISO-8859-1</project.build.sourceEncoding>
      </properties>
      
      <build>
      <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>3.8.1</version>
            <configuration>
                <source>1.7</source>
                <target>1.7</target>
                <encoding>ISO-8859-1</encoding>
            </configuration>
            
        </plugin>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-surefire-plugin</artifactId>
            <version>3.0.0-M4</version>
            <configuration>
                <suiteXmlFiles>
                    <suiteXmlFile>testng.xml</suiteXmlFile>
                </suiteXmlFiles>
            </configuration>        
        </plugin>   
      </plugins>
      </build>
      
      <dependencies>
      
        <dependency>
            <groupId>org.seleniumhq.selenium</groupId>
            <artifactId>selenium-java</artifactId>
            <version>3.141.59</version>
        </dependency>
        
        <dependency>
            <groupId>org.testng</groupId>
            <artifactId>testng</artifactId>
            <version>6.14.3</version>
        </dependency>
        
        <dependency>
            <groupId>joda-time</groupId>
            <artifactId>joda-time</artifactId>
            <version>2.10.4</version>
        </dependency>
        
        <dependency>
            <groupId>commons-io</groupId>
            <artifactId>commons-io</artifactId>
            <version>2.5</version>
        </dependency>
        
        <dependency>
            <groupId>com.oracle.ojdbc</groupId>
            <artifactId>ojdbc8</artifactId>
            <version>19.3.0.0</version>
        </dependency>
      
      </dependencies>
    
    </project>

testng.xml:

    <?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE suite SYSTEM "https://testng.org/testng-1.0.dtd">
    <suite name="Suite">
      <test name="Test">
        <classes>
          <class name="tests.TestCreateAssistTest"/>
        </classes>
      </test>
    </suite>

Answer 1

Try this:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE suite SYSTEM "http://testng.org/testng-1.0.dtd">
<suite name="Suite">
  <test name= "TestCases">
    <classes>
<class name= "tests.CreateAssistTest"/> 
        </classes>  
        </test>
</suite> <!-- Suite -->

your testng.xml is wrong (https://testng.org/doc/documentation-main.html#testng-xml), Use a good IDE. It will show the exact error.

I tried your POM and it works fine: