Running tests via Maven in Selenium Java

Introduction

We use Maven to easily run and manage Selenium tests. It helps run tests with one command and handles dependencies automatically.

You want to run all your Selenium tests in one go without opening each test file.

You need to run tests on different machines or servers in the same way.

You want to automate tests as part of your project build process.

You want to share your test project with others and make running tests simple.

You want to generate reports after running tests automatically.

Syntax

Selenium Java

mvn test

# To run tests with a specific test class:
mvn -Dtest=TestClassName test

# To run tests with a specific method:
mvn -Dtest=TestClassName#testMethodName test

mvn test runs all tests in the project.

You can specify which tests to run using the -Dtest option.

Examples

Runs all Selenium tests in the project.

Selenium Java

mvn test

Runs only the LoginTest class tests.

Selenium Java

mvn -Dtest=LoginTest test

Runs only the testValidLogin method inside LoginTest.

Selenium Java

mvn -Dtest=LoginTest#testValidLogin test

Sample Program

This is a simple Selenium test using JUnit 5. It opens Google and checks the page title.

Running mvn test will execute this test and show results in the console.

Selenium Java

package tests;

import org.openqa.selenium.WebDriver;
import org.openqa.selenium.chrome.ChromeDriver;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import static org.junit.jupiter.api.Assertions.assertEquals;

public class SimpleTest {
    WebDriver driver;

    @BeforeEach
    public void setup() {
        driver = new ChromeDriver();
    }

    @Test
    public void testGoogleTitle() {
        driver.get("https://www.google.com");
        String title = driver.getTitle();
        assertEquals("Google", title);
    }

    @AfterEach
    public void teardown() {
        if (driver != null) {
            driver.quit();
        }
    }
}

// To run this test via Maven, use the command:
// mvn test

// Expected output snippet:
// [INFO] -------------------------------------------------------
// [INFO]  T E S T S
// [INFO] -------------------------------------------------------
// [INFO] Running tests.SimpleTest
// [INFO] Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: X.XXX s - in tests.SimpleTest
// [INFO] 
// [INFO] Results:
// [INFO] 
// [INFO] Tests run: 1, Failures: 0, Errors: 0, Skipped: 0
// [INFO] 
// [INFO] ------------------------------------------------------------------------
// [INFO] BUILD SUCCESS
// [INFO] ------------------------------------------------------------------------

Important Notes

Make sure your pom.xml includes the maven-surefire-plugin to run tests.

Ensure your Selenium WebDriver binaries (like chromedriver) are set up correctly in your system PATH.

You can add test reports plugins in Maven to get detailed test reports after running tests.

Summary

Maven lets you run Selenium tests easily with one command.

You can run all tests or select specific tests using command options.

Test results show in the console and can be extended with reports.

Practice

1. What is the basic Maven command to run all Selenium tests in a project?

easy

A. mvn test

B. mvn clean

C. mvn compile

D. mvn install

Solution

1. Step 1: Understand Maven lifecycle phases

   Maven has phases like clean, compile, test, package, install. The test phase runs tests.

2. Step 2: Identify command for running tests

   The command mvn test runs all tests in the project, including Selenium tests.

3. Final Answer:

   mvn test -> Option A

4. Quick Check:

   Maven test phase = mvn test [OK]

Hint: Use mvn test to run all tests quickly [OK]

Common Mistakes:

• Using mvn clean which only cleans files
• Using mvn compile which only compiles code
• Confusing mvn install with running tests

2. Which Maven command runs a specific Selenium test class named LoginTest?

easy

A. mvn run -Dtest=LoginTest

B. mvn test -Dtest=LoginTest

C. mvn test -Dclass=LoginTest

D. mvn compile -Dtest=LoginTest

Solution

1. Step 1: Recall Maven syntax for running specific tests

   Maven uses -Dtest=ClassName to run a specific test class.

2. Step 2: Match correct command format

   mvn test -Dtest=LoginTest runs only the LoginTest class.

3. Final Answer:

   mvn test -Dtest=LoginTest -> Option B

4. Quick Check:

   Run single test = -Dtest=ClassName [OK]

Hint: Use -Dtest=ClassName to run one test class [OK]

Common Mistakes:

• Using -Dclass instead of -Dtest
• Using mvn run which is not a valid phase
• Trying to run tests during compile phase

3. Given the Maven command mvn test -Dtest=LoginTest, what will be the output if LoginTest has 3 passing Selenium tests?

medium

A. No tests run because -Dtest is ignored

B. All tests run, but only 3 tests from LoginTest pass

C. Only 3 tests from LoginTest run and all pass

D. Tests fail because mvn test can't run specific tests

Solution

1. Step 1: Understand -Dtest effect

   The -Dtest=LoginTest option runs only tests in the LoginTest class.

2. Step 2: Interpret test results

   If LoginTest has 3 tests and all pass, only those 3 tests run and pass.

3. Final Answer:

   Only 3 tests from LoginTest run and all pass -> Option C

4. Quick Check:

   -Dtest runs specified tests only [OK]

Hint: Specific test runs only those tests, others skipped [OK]

Common Mistakes:

• Thinking all tests run despite -Dtest
• Assuming -Dtest is ignored
• Believing mvn test can't run specific tests

4. You run mvn test -Dtest=LoginTest but get an error: Could not find or load main class LoginTest. What is the likely cause?

medium

A. Maven does not support running specific tests

B. The pom.xml file is missing

C. You forgot to compile the project before testing

D. The test class name is misspelled or not in the correct package

Solution

1. Step 1: Analyze error message

   The error says it cannot find the LoginTest class, meaning the name or location is wrong.

2. Step 2: Check common causes

   Misspelling the class name or incorrect package path causes this error. Maven supports running specific tests, so A is wrong. Compile errors or missing pom.xml cause different errors.

3. Final Answer:

   The test class name is misspelled or not in the correct package -> Option D

4. Quick Check:

   Class not found = wrong name or package [OK]

Hint: Check test class spelling and package path first [OK]

Common Mistakes:

• Assuming Maven can't run specific tests
• Ignoring compilation errors
• Thinking missing pom.xml causes this error

5. You want to run all Selenium tests but exclude the SlowTests class using Maven. Which command achieves this?

hard

A. mvn test -Dtest=!SlowTests

B. mvn test -DexcludedTests=SlowTests

C. mvn test -Dtest='*' -DexcludedTests=SlowTests

D. mvn test -Dtest='*' -DexcludeTests=SlowTests

Solution

1. Step 1: Recall Maven syntax for excluding tests

   Maven allows excluding tests by prefixing the class name with an exclamation mark in -Dtest, like -Dtest=!ClassName.

2. Step 2: Match correct command

   mvn test -Dtest=!SlowTests runs all tests except SlowTests. Other options use invalid or unsupported properties.

3. Final Answer:

   mvn test -Dtest=!SlowTests -> Option A

4. Quick Check:

   Exclude test with -Dtest=!ClassName [OK]

Hint: Use -Dtest=!ClassName to exclude tests [OK]

Common Mistakes:

• Using -DexcludedTests which is unsupported
• Using wrong property names like excludeTests
• Trying to exclude tests without exclamation mark