![]() So in our example, we shall run the following command −Īfter the command has been successfully executed, the browser in which the test is executed - Firefox/65.0 gets printed in the console. Step 4 − Execute the code with the command given below − Step 3 − Add the below code within the testcase1.js file created.Īwait p.setViewport() ![]() Step 2 − Enter a filename, say testcase1.js. Right-click on the folder where the node_modules folder is created, then click on the New file button. The details on Puppeteer installation is discussed in the Chapter of Puppeteer Installation. Step 1 − Create a new file within the directory where the node_modules folder is created (location where the Puppeteer and Puppeteer core have been installed). To begin, follow Steps 1 to 2 from the Chapter of Basic Test on Puppeteer which are as follows − Step 1 − We have to first install Puppeteer for the Firefox browser by executing the below command −Īlso, we have to add the Firefox-Puppeteer library in the code. It must be remembered that while executing the test in Firefox, Puppeteer uses its internal Firefox browser and not the Firefox browser installed in the local system. ![]() We can run the tests developed in Puppeteer in Firefox. Comparison Between Puppeteer & Protractor.Comparison Between Puppeteer & Selenium.log( "CHILD: url received from parent process", url) Ĭonst browser = await puppeteer. The code snippet below is a simple example of running parallel downloads with Puppeteer.Ĭonst downloadPath = path. □ If you are not familiar with how child process work in Node I highly encourage you to give this article a read. We can combine the child process module with our Puppeteer script and download files in parallel. Child process is how Node.js handles parallel programming. We can fork multiple child_proces in Node. Our CPU cores can run multiple processes at the same time. □ Learn more about the single threaded architecture of node here ![]() Therefore if we have to download 10 files each 1 gigabyte in size and each requiring about 3 mins to download then with a single process we will have to wait for 10 x 3 = 30 minutes for the task to finish. ![]() It can only execute one process at a time. You see Node.js in its core is a single-threaded system. However, if you have to download multiple large files things start to get complicated. In this next part, we will dive deep into some of the advanced concepts. ![]()
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