how to run all methods one by one in multiple class by setting priroty using testng

Question

how to run all methods one by one in multiple class by setting priority using testng?

public class test1 {
    @Test(priority = 1)
    public void test1()
    {
    System.out.println("test1");
    }
    @Test(priority = 2)
    public void test2()
    {
     System.out.println("test2");
    }
}
public class test2 {
    @Test(priority = 1)
    public void test3()
    {
    System.out.println("test3");
    }
    @Test(priority = 2)
    public void test4()
    {
    System.out.println("test4");
    }
}

Expected output

test1
test2
test3
test4

but getting

test1
test3
test2
test4

how to run class 1 firs and then class 2?

<!DOCTYPE suite SYSTEM "https://testng.org/testng-1.0.dtd" >
<suite name="SANITY SUITE">
<test name="TESTCASE1" >
<classes>
<class name="demo.demo.test1"/>
<class name="demo.demo.test2"/>
</classes>
</test>
</suite>

Have you tried any of the proposed answers? Would be nice if you could leave some feedback for future readers. A full working project used for my answer can be found at https://github.com/SubOptimal/stackoverflow-answers/tree/master/question-59639168 — SubOptimal, Jan 09 '20 at 07:42

score 1 · Answer 1 · answered Jan 08 '20 at 07:51

1

In your suite xml use this: <test name="TESTCASE1" group-by-instances="true" >

https://stackoverflow.com/a/26635229/8794926

answered Jan 08 '20 at 07:51

Vladucu Voican

283
1
10

score 0 · Answer 2 · answered Jan 08 '20 at 07:59

From the documentation (search for preserve-order)

By default, TestNG will run your tests in the order they are found in the XML file.

Assuming following structure

pom.xml
src/test/java/testng.xml
src/test/java/demo/demo/test2.java
src/test/java/demo/demo/test1.java

snippet in the pom.xml

<properties>
    <maven.compiler.source>13</maven.compiler.source>
    <maven.compiler.target>13</maven.compiler.target>
</properties>
<dependencies>
    <dependency>
        <groupId>org.testng</groupId>
        <artifactId>testng</artifactId>
        <version>7.0.0</version>
        <scope>test</scope>
    </dependency>
</dependencies>

<build>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-surefire-plugin</artifactId>
            <version>2.22.0</version>
            <configuration>
                <suiteXmlFiles>
                    <suiteXmlFile>${project.build.testSourceDirectory}/testng.xml</suiteXmlFile>
                </suiteXmlFiles>
            </configuration>
        </plugin>
    </plugins>
</build>

testnng.xml - the one you provided

test1.java and test2.java - the ones you provided with added import and package statement

Running the tests as mvn test will produce the expected output

[INFO] --- maven-surefire-plugin:2.22.0:test (default-test) @ playground.testng ---
[INFO] 
[INFO] -------------------------------------------------------
[INFO]  T E S T S
[INFO] -------------------------------------------------------
[INFO] Running TestSuite
test1
test2
test3
test4
[INFO] Tests run: 4, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.758 s - in TestSuite

Some possible reasons why it fails in your case:

somehow the default behavior of preserve-order is overwritten
you call your tests in a way the testng.xml is not taken into account

how to run all methods one by one in multiple class by setting priroty using testng

2 Answers2