Lambdatest A Cloud Base Cross Browser Testing Platform
What is LambdaTest?
LambdaTest provides all of your website and web application testing needs to cloud infrastructure using a scalable cloud-based cross-browser testing platform. With the LambdaTest platform, you can ensure that your web app elements (such as JavaScript, CSS, HTML5, Video, etc.) render smoothly across every desktop and mobile web browser with manual, visual, and automated testing capabilities. With LambdaTest, you can access up to 2000+ combinations of desktop and mobile browsers on the cloud. Furthermore, LambdaTest offers an LT browser, which is a developer-oriented tool for assessing a website's responsiveness.
LT Browser has made mobile website testing much easier with over 25+ devices to choose from, interactive developer tools, and scroll sync. Using localhost URLs without extensions or tunnels, you can even create your own custom devices.
Selenium Grid is compatible with every test automation framework for Java, JavaScript, C#, Ruby, PHP, and Python that supports Selenium bindings. Our mobile & desktop testing automation services help you automate both your desktop & mobile web testing workflows.
LambdaTest allows you to run parallel test sessions at the same time, reducing your test cycles and increasing your efficiency. LambdaTest facilitates one-click bug logging into various bug management tools like Jira, Asana, Trello, Github, Paymo, TeamWork, Mantis, Hive, and others right from the LambdaTest platform.
- Key benefits of using LambdaTest
- Automation of Selenium Web Testing
- Test Mobile Web Applications Using Selenium Grid
- Browser compatibility testing in real-time
- Automated screen capture testing for faster results
- You can use the LT browser app to test two devices simultaneously by scrolling Sync
- A Faster Go-to-Market Launch With Parallel Testing
- Testing API for Continuous Integration
- Continual testing with continuous integration tools
According to users, the LambdaTest tool is the best and most reliable to use. Since LambdaTest Screenshots is providing a full-page screenshot that made their life easy, screenshots come in handy. The tool helps them in their browser compatibility testing processes on Mac OS and iPhone devices. The main plus point of the tool is its integration feature and helps them on log issues found on Lambdatest directly on their Asana boards.
LambdaTest Tunnel troubleshooting
In order to perform tests on locally hosted websites and web apps, LambdaTest Tunnel establishes an SSH connection between your local computer and our cloud servers. Even before your website goes live, you can use LambdaTest Tunnel to test how robust it is across 3000+ real browsers.
This document will help you troubleshoot the most common challenges that you might encounter if you are unable to run cross-browser testing using LambdaTest Tunnel.
That's a mistake! Have trouble testing your locally hosted application through LambdaTest Tunnel? Follow these guidelines.
Here are some common issues to consider before we proceed:
- Connecting to localhost failed
- The host header is invalid
- There is a problem loading CSS in WordPress
- Whitelisting IP addresses
- There is no available PORT
- Creating a custom hostname
- The Console User Interface (CUI)
- The connection through port 443 to the secure shell tunnel could not be established
The LT file cannot be opened by Apple because it cannot be scanned for malware
1. Connection refused by localhost
After configuring the tunnel, you might run into an error similar to the below screenshot:
Using localhost as a URL is incompatible with a number of browsers and browser versions, resulting in Localhost refusing to connect. Localhost is intentionally replaced with localhost.lambdatest.com or your local IP address.
however, URL: https://localhost.lambdatest.com/demo.html or 10.0.0.15/demo.html would definitely work fine for you.
2. Host header is invalid
You may receive an "Invalid Host Header" error message when testing an application hosted on your local machine. The cause of this error is most often a misconfiguration of the application server, which is causing it to reject connections from nonlocal hosts or requests directed to hostnames other than localhost.
Web applications today are built using a variety of frameworks like angular, react, etc. In order to test them using the tunnel, the command used to run your web app needs to be changed in your project manifest, which is the "package.json" file.
As for the Angular framework project, ideally, you should run your web application using "ng serve" or "npm start" or you should set the package.json configuration to "ng serve" in order to start it locally. However, this might cause a Real-Time Test to throw an "Invalid Host Header" error.
I have a quick solution for you. Instead of changing your running command, you can use ng serve --host 0.0.0.0 --disable-host-check or set your start configuration in package.json as "ng serve --host 0.0.0.0 --disable-host-check" to run your application
When developing a React framework web application, you need to create an env file that contains the hostname. The syntax is HOST=* hostname >, once you have done that, you can add your localhost IP along with your hostname to your system hosts file.
- Example: 127.0.0.1 < hostname >
This would help you avoid the “Invalid Host Header” error.
3. CSS not loading in WordPress
You may run into issues with CSS rendering when testing a local web app built with WordPress. See the following screenshot:
In general, you should update the WordPress Address and Site Address on the General Settings tab in the WordPress dashboard with your system IP address rather than localhost, then everything will be emitted according to that address. See the screenshot below for further reference:
4. IP Whitelisting
Setting up a Local Testing connection and whitelisting the IPs listed below for a domain that requires IP whitelisting is all you need to do when testing a server that requires IP whitelisting:
http://ts.lambdatest.com/
- 34.217.66.228
- 3.214.241.254
- 52.36.84.247
- 52.87.208.206
- 13.126.37.58
- 3.66.78.89
http://ltuns.lambdatest.com/
- 3.214.36.18
- 18.184.191.217
- 13.232.45.218
However be advised, as we are aggressively adding more and more data centers, these IPs would be changed, you can see the updated IPs on this documentation as well.
5. No available ports were found
Whenever LambdaTest Tunnel binary is started, it attempts to find free ports sequentially from 9090 to 9094, and if it cannot find any free PORTS, then it throws an error message "No available Port found in 5 attempts".
Either your system has more than five tunnels running simultaneously or the ports that the tunnel is trying to access are already occupied by another application.
6. Custom Host Name
If some firewall restrictions prevent your web application from being accessed on some other servers even after whitelisting IPs and configuring the tunnel, you must add an entry to the host file, which maps hostnames to IP addresses. It is possible to change the IP address that you use to resolve a domain name with the host's file. Your computer will only be affected by this change without having an impact on how the domain is resolved globally.
Using this technique will allow you to see what your website will look like on a different server without changing your domain's DNS settings.
If you are using an operating system other than Windows, you can find the host's file at:
Windows – SystemRoot > system32 > drivers > etc > hosts By default the system root is C:\Windows, so if you are using Windows, your hosts file is most probably:
C:\Windows\System32\drivers\etc\ hosts)
Linux – /etc/hosts
Mac OS X – /private/etc/hosts
Consider the case where you would like to resolve mydomain.com to 10.20.30.40. You would need to open the host's file with a text editor and add the following line: 10.20.30.40 mydomain.com www.mydomain.com
7. Still having trouble? We can help through our console interface (CUI)
Our tunnel has been upgraded with CUI(Console UI). You can use the CUI to present detailed information within your cmd/terminal console to help you see what is wrong with the SSH connection.
As the SSH connection established through LambdaTest Tunnel is updated in real-time, these logs will be updated in real-time as well. A problem with your internet provider may cause you to crash your binary file, for example. Such cases will result in the below logs being generated in the CU
8. Unable To Establish A Secure Shell Tunnel Connection Through Port 443
Port 443 is used for secure web browser communication. Web servers offering to accept and establish secure connections listen on this port for connections from web browsers desiring strong communication security.
Port 443 is a standard Port for routing traffic to ltuns.lambdatest.com, however, if this port is unable to establish a secure shell tunnel connection, you might receive an error message shown in the below screenshot.
In such a case, you can switch to Port 22 which is a default SSH Port and is used for Secure Shell (SSH) communication and allows remote administration access to the VM. For switching to Port 22 from Port 443, you can append -customSSHPort 22 to your usual.
9. LT Can’t Be Opened Because Apple Cannot Check It For Malicious Software
Catalina OS users may get the below error from the command line while trying to configure the LambdaTest Tunnel to test their locally hosted web pages: “LT can’t be opened because Apple cannot check it for malicious software”
This error occurs due to the increased restrictions on third-party software, downloaded from the internet. Since Catalina OS is recently launched by Apple, we are working to make our LambdaTest Tunnel compatible with the new OS.
While we are at it, here is a one-time setup workaround. All you need to do is run the below command before you start configuring your LambdaTest Tunnel:
- xattr -d com.apple.quarantine ./LT
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