Getting error “cucumber.runtime.CucumberException: Couldn't load plugin class: com.cucumber.listener.ExtentCucumberFormatter.”

After many days searching for a solution to this problem that was also happening to me, I discovered the cause (at least that worked for me). Apparently, the pluggin com.cucumber.listener.ExtentCucumberFormatter or com.vimalselvam.cucumber.listener.ExtentCucumberFormatter (for cucumber-extentreports version 3.1.1+) only works with the cucumber of the info.cukes package.

<! - https://mvnrepository.com/artifact/info.cukes/cucumber-java ->
<dependency>
<groupId>info.cukes</ groupId>
<artifactId>cucumber-java</artifactId>    
<version>1.2.5</ version>
</dependency>

To use ExtentReports with the most current cucumber versions (package io.cucumber from versions 2.X.X onwards) you need to add the cucumber-adapter plugin.

For each X version of cucumber, there is an adapter, such as for cucumber version 4.X.X the extentreports-cucumber4-adapter dependency is required.

<dependency>
<groupId>com.aventstack</groupId>
<artifactId>extentreports-cucumber4-adapter</artifactId>
<version>1.0.7</version>
</dependency>

          

And in the class Runner you should replace the plugin:

"com.cucumber.listener.ExtentCucumberFormatter:"

by

"com.aventstack.extentreports.cucumber.adapter.ExtentCucumberAdapter:"

For an example of using cucumber 4 with extent reports follow the GitHub link I found:

https://github.com/foursyth/extentreports-cucumber4-example

For versions 2.X.X and 3.X.X follow the same principles as 4.X.X

ExtentReport settings specification link of all versions:

http://extentreports.com/documentation/

Hope this helps.

Advise is to upgrade your cucumber v to 4.x.x. Doing so would not only resolve your error rather you would be able to generate consolidated report during parallel execution as well without creating runners manually.

There are 2 ways of implementing extent report in Cucumber :

1. Using Cucumber-JVM 4 adapter for Extent Framework(extentreports-cucumber4-adapter) - Beauty is, you do not need to write any code any where to generate report this way except from setting adapter in runner below.

Add adapter dependency under POM.XML

<dependency>
    <groupId>com.aventstack</groupId>
    <artifactId>extentreports-cucumber4-adapter</artifactId>
    <version>1.0.6</version>
</dependency>

Add the com.aventstack.extentreports.cucumber.adapter.ExtentCucumberAdapter plugin to the runner.

@RunWith(Cucumber.class)
@CucumberOptions(plugin = {"com.aventstack.extentreports.cucumber.adapter.ExtentCucumberAdapter:"})
public class RunCukesTest {
    // ..
} 

Report Output Directory - ../Project Directory/test-output/HtmlReport

2. Adding aventstack dependency under POM.XML

<dependency>
    <groupId>com.aventstack</groupId>
    <artifactId>extentreports</artifactId>
    <version>3.1.5</version>
</dependency> 

In this workflow, Do not Add the com.aventstack.extentreports.cucumber.adapter.ExtentCucumberAdapter plugin to the runner.