Are you aware of the differences between Client-Server Testing and Web-Based Testing? Do you know the aspects to consider when testing these applications?
This guide will comprehensively answer the aforementioned queries with the help of simplified examples to enhance your understanding.
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Projects can generally be divided into two types:
- 2 Tier Applications
- 3 Tier Applications
What You Will Learn:
CLIENT/SERVER TESTING
This type of testing is commonly performed for two-tier applications, which are typically designed for LAN. It involves a front-end and a back-end.
Apps introduced at the front-end will consist of forms and reports for tracking and manipulating data.
For instance, apps conceived in VB, VC++, Core Java, C, C++, D2K, PowerBuilder, etc. The backend for these apps would be MS Access, SQL Server, Oracle, Sybase, Mysql, Quadbase.
The testing performed on these kinds of applications will include:
- User Interface Testing
- Manual Support Testing
- Functionality Testing
- Compatibility Testing & Configuration Testing
- Intersystem Testing
WEB TESTING
Web testing is executed for three-tier applications (designed for Internet / intranet / xtranet). This comprises of a browser, a web server, and a database server.
Browser-based apps are developed in HTML, DHTML, XML, JavaScript, etc. (app monitoring is possible).
Web server applications are created using Java, ASP, JSP, VBScript, JavaScript, Perl, Cold Fusion, PHP, etc. (manipulations on the web server are facilitated by these developed packages).
The database server contains Oracle, SQL Server, Sybase, MySQL, etc. (all data is stored in the database on the DB server).
Tests conducted on these types of applications include:
- User Interface Testing
- Functionality Testing
- Security Testing
- Browser Compatibility Testing
- Load/Stress Testing
- Interoperability Testing/Intersystem Testing
- Storage and Data Volume Testing
Web Application is a Three-Tier Application
This consists of a browser (which displays data) [monitoring done employs HTML, DHTML, XML, javascript] -> a web server (manipulates data) [manipulations performed use programming languages/scripts such as adv java, asp, JSP, VBScript, javascript, Perl, ColdFusion, php] -> a database server (stores data) [data storage/retrieval employs databases like Oracle, SQL Server, Sybase, MySQL].
The types of tests applicable to these types of applications include:
- User Interface Testing for verification & user-friendliness.
- Functionality Testing for validating behaviors, input, error handling, output, manipulations, service levels, operational sequence, links, webpage content & backend coverage.
- Security Testing
- Browser Compatibility
- Load/Stress Testing
- Interoperability Testing
- Storage & Data Volume Testing
Client-Server Application is a Two-Tier Application
This involves forms & reporting at the front-end (monitoring & manipulations are performed) [using vb, vc++, core java, c, c++, d2k, power builder etc.,] -> database server at the backend (data storage & retrieval) [using ms access, SQL Server, Oracle, Sybase, MySQL, quad base etc.,].
The tests carried out on these applications are:
- User Interface testing
- Manual Support Testing
- Functionality Testing
- Compatibility Testing
- Intersystem Testing
Beneath, we list additional points to differentiate Desktop, Client-Server, and Web applications.
Desktop Application:
- Application operates within a single memory (Both Front end and Back end are in the same location)
- Single-user only
Client/Server Application:
- Applications function on two or more machines.
- Applications are directed by menus.
- Constant connectivity (connection persists until logout).
- A limited number of users.
- Fewer network-related issues than web applications.
Web Application:
- Applications operate on two or more machines.
- URL-driven
- Disconnected mode (stateless)
- Unlimited user capacity.
- Numerous challenges like Hardware Compatibility, Browser Compatibility, Version Compatibility, Security Issues, Performance Concerns, etc.
Differentiating both, the applications originate from their resource access manner. In Client-Server, once a connection is established, it remains connected, while web testing’s HTTP protocol is stateless, leading to the concept of cookies, which isn’t present in Client-Server.
In Client-Server software, users are identified, while for a web application, any user can log in and use the content according to their intentions.
Hence, Web Applications always present security and compatibility issues.
Over to you: On which type of application are you working? Desktop, Client-Server, or Web Application? Would you like to share your experience testing these applications?
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