parallel execution in junir code example

Example 1: parallel testing in junit

If we use JUNIT, we can use maven plugins to run tests in parallel. 
In maven-surefire-plugin, we can specify how many threads we want to open 
at the same time.

<plugin>
	<groupId>org.apache.maven.plugins</groupId>
	<artifactId>maven-surefire-plugin</artifactId>
	<version>2.18.1</version>
	<configuration>
		<parallel>classes</parallel>  ==> you can choose classes or methods
		<threadCount>5</threadCount>  ==> how many browser will be launched
			<includes>					  
				<includetest1.java</include>   
				<includetest2.java</include>
				<includetest3.java</include>
				<includetest4.java</include>
			</includes>
		<testFailureIgnore>true</testFailureIgnore>
	</configuration>
</plugin>

We also have to make some changes in Driver class. We need to use 
"ThreadLocal<WebDriver> driverPool" instead of "WebDriver driver". 
Because "WebDriver" generates only a single WebDriver object, 
whereas "ThreadLocal<WebDriver>" generates multiple browser to run 
parallel testing.  

In TestNG it is very easy and efficient to perform

Example 2: junit parallel testing

If we use JUNIT, we can use maven plugins to run tests in parallel. 
In maven-surefire-plugin, we can specify how many threads we want to open 
at the same time.

<plugin>
	<groupId>org.apache.maven.plugins</groupId>
	<artifactId>maven-surefire-plugin</artifactId>
	<version>2.18.1</version>
	<configuration>
		<parallel>classes</parallel>  ==> you can choose classes or methods
		<threadCount>5</threadCount>  ==> how many browser will be launched
			<includes>					  
				<includetest1.java</include>   
				<includetest2.java</include>
				<includetest3.java</include>
				<includetest4.java</include>
			</includes>
		<testFailureIgnore>true</testFailureIgnore>
	</configuration>
</plugin>

We also have to make some changes in Driver class. We need to use 
"ThreadLocal<WebDriver> driverPool" instead of "WebDriver driver". 
Because "WebDriver" generates only a single WebDriver object, 
whereas "ThreadLocal<WebDriver>" generates multiple browser to run 
parallel testing.  

In TestNG it is very easy and efficient to perform