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EXTERNAL INTERFACE TESTING OR INTERSYSTEM TESTING

External interface testing or Intersystem testing is the process of testing the integration points of single application or software hosted at different locations and then confirming the correct data flow across the different locations. It validates the system based on how the different systems are interconnected to complete the end to end flow of the control and data. The applications are interconnected to other application systems. External interface testing ensures the interconnection between the application functions correctly. The multiple applications involved are sometimes called as cycles or functions.

For example, the shopping sites, air ticket booking sites, etc are linked to payment sites like paypal.com with payment functionality. Another example, the social networking sites have advertisement links to shopping sites.

The main objectives of this external interface testing are:

  • Accurate parameters and correct data are passed between different applications.
  • Documentation for required applications is correct and organised and correct in all details.
  • Having proper timing and coordination between the applications. For example Loan system software is sharing the database with accounting system software in the banking sector and in Shopping mall billing system and bar code reader is interconnected with each other.

Example:

The user can purchase products on eBay.com by searching the product, selecting product, selecting paypal as payment option. The paypal.com page opens. The user logs into the account and makes payment. If payment is successful, the order details are displayed on eBay.com. External interface testing is to test the payment functionality that links eBay.com and paypal.com.

external interface testing, intersystem testing
external interface testing

Check your understanding:

1. What is the use of Intersystem testing?

2. What are the advantages and disadvantages of intersystem testing?

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27 thoughts on “EXTERNAL INTERFACE TESTING OR INTERSYSTEM TESTING”

  1. Inter-system testing: It is used to ensure the interconnection between the application functions correctly. It validates the system based on how the different systems are interconnected to complete the end to end flow of the control and data.
    Advantages and disadvantages:
    Advantages:
    – End user can save time by not opening different applications.
    – Easy to access applications.
    Disadvantages:
    -Time consuming
    -Cost may be expensive if system is run several times iteratively.

  2. 1. Use of Intersystem testing is to make sure the interaction between applications works correctly.
    2. Advantages:
    – Many software applications can work with each other with less cost and time.
    – Data can be shared between applications, which makes it user-friendly.
    Disadvantages
    – More data exchanges at a time, may make the loading process slow.
    – Time consuming

  3. Intersystem testing is done to ensure that two applications are working correctly.

    Advantage is that the error can be detected before the user use the application.
    Disadvantage could be time consuming.

  4. Intersystem testing also known as External Interface testing is used to test the proper functionality of the external interface to test the payment option for example when we are renewing the car registration on dmv site after initial details of the customer and car is matched with dmv’s database one is directed to another site for making the payment which is an external interface for processing the payment and are referred to as third party vendor like the bank or credit card companies which processes the payment via credit, debit or account of the customer. Thus, accuracy between the data and correct documentation is of utmost importance in this kind of testing.

  5. Intersystem testing is the process of testing the integration points of single application or software hosted at different locations and then confirming the correct data flow across the different locations.
    Advantage is that multiple applications are involved and it ensures exact data flow thorough a the locations.

  6. External interface testing ensures the interconnection between the application functions correctly and also it validates the system based on how the different systems are interconnected to complete the end to end flow of the control and data.
    The advantages and disadvantages of intersystem testing are:
    Advantage- if there is an error between the applications it can be detected
    Disadvantage- if your application is fine but the other application is not working it can delay your release

  7. EXTERNAL INTERFACE TESTING
    1. It’s used to ensure the connection between two different application functions.
    2. Advantages: if there is an error between two application functions, it can be detected. Disadvantages: very time consuming and expensive.

  8. This is an article on intersystem testing. It explains how data flow is tested across various locations when users are led to a different site while on a particular site.

  9. Intersystem testing is a process of testing the integration of one system in collaboration with other system. It validates the system based on different interconnectivity to complete the end to end flow.
    Advantages: It is like a risk testing which eliminates a lot of unforseen scenarios and fixes it. Comprehensive and practical, makes a quality software
    Disadvantages: time consuming, expensive

  10. 1. Use of Inter-system testing:
    –To ensure interconnection between application functions correctly. It means sharing the resources of one system with another. The process of testing the integration points for single application hosted at different locations and then ensuring correct data flow across each location is known as inter system testing.

    2. Advantages and disadvantages of inter-system testing:
    • Advantages:
    – End user can save time by not opening different application.
    – Easy to access applications.
    – Easy to identify defects across applications.

    • Disadvantages:
    – Amount of data passed between applications can be a lot and it may make the entire end user experience a slow one.

  11. External interface testing or inter system testing validates the system based on how the different systems are interconnected to complete the end to end flow of the control and data. The applications are interconnected to other application systems. it is the process of testing the integration points of single application or software hosted at different locations and then confirming the correct data flow across the different locations.
    the main objectives are: Accurate parameters and correct data are passed between different applications.
    Documentation for required applications is correct and organised and correct in all details.
    Having proper timing and coordination between the applications.
    the advantage is External interface testing ensures the interconnection between the application functions correctly.
    the disadvantage is all the applications those are interlinked must be active all the time as no one knows when they are used.if the interlinked system is down,it will take more time to complete the task or it may get into failure.

  12. These kind of testing, test the flow of data between the integration point of the software and clear the surety of the connection of data till end. For instance: Amazon.com is a shopping website but it also contain other product add on the same page that interlink to that product page, payment page, shipping information page etc.

  13. 1. Use of Inter system testing is to make sure the interaction between applications works correctly.
    2. Advantages:
    – Many software applications can work with each other with less cost and time.
    – Data can be shared between applications, which makes it user-friendly.
    Disadvantages
    – More data exchanges at a time, may make the loading process slow.
    – Time consuming

  14. Intersystem testing is sharing the resources of one system with another. It validates the system based on how the different systems are interconnected to complete the end to end flow of the control and data
    Advantages are easy to access and automated data exchange will help the user , time saver for the end user .
    Disadvantages are coordination between two different system need to be follow which is time consuming .

  15. External Interface testing is done to demonstrate the completeness of control and data end to end flow on different interconnected systems. Moreover, making sure that interconnection between the application functions are working correctly.
    The advantages of External Interface testing are that provides assurance that correct data are flowing through different applications. The required applications have detailed organized and correct documentation, as well as timing and coordination between applications are verified and appropriate. Most of all is that the safety concerns will be addressed between required applications. However, there are some disadvantages related to time, resources, and budgets.

  16. 1.Intersystem testing is the process of testing the integration points of single application or software hosted at different locations and then confirming the correct data flow across the different locations. It validates the system based on how the different systems are interconnected to complete the end to end flow of the control and data.
    Advantages: it is easy to identify the defects and save time.
    Disadvantages: It is time consuming.

  17. 1.Inter-system testing: It is used to ensure the interconnection between the application functions correctly. It validates the system based on how the different systems are interconnected to complete the end to end flow of the control and data.
    2.Advantages:
    -Many software applications can work with each other with less cost and time.
    – Data can be shared between applications.User no need to open different aplications.
    Disadvantages
    – More data exchanges at a time, may take the loading process slow.

  18. 1.The use of InterSystem Testing also called as External Interface Testing is the test the interface between two different independent software are tested.
    2. The advantage is the different application is link with each other in software, eg:facebook is linked to advertisement link which further link to shopping site and last to PayPal.The disadvantage is its time consuming connecting between two software.

  19. The use of inter system testing is to make sure that the interaction between systems works correctly and efficiently.
    Advantage: data can be shared between applications, and it’s user friendly. Many software applications can work with each other in less time and less cost.
    Disadvantage: more data exchanges at the same time makes the loading process slow. It’s also time consuming.

  20. 1. Testing done to ensure interconnection between applications.
    2. Advantage: Allows to find defect in interconnected systems.
    Disadvantage: Time consuming and tedious if test automation not done. It is costly because it may be expensive if system is run several times iteratively.

  21. The process of testing the integration points for single application hosted at different locations and then ensuring correct data flow across each location is known as inter system testing.
    Advantage: :It ensures that the interconnection between the application functions correctly.
    Dis advantage:Time consuming and expensive if system is run several times iteratively.

  22. External interface testing or Intersystem testing is the process of testing the integration points of single application or software hosted at different locations and then confirming the correct data flow across the different locations.

    Advantage: Allows to find defect in interconnected systems.
    Disadvantage: Time consuming and expensive.

  23. 1)What is the use of Intersystem testing?
    Intersystem testing is external interface testing to ensure that the interconnection between the application functions correctly.
    2. What are the advantages and disadvantages of intersystem testing?
    Advantage: Accurate parameters and correct data are passed between different applications.
    Disadvantage: More data exchanges at a time, may take the loading process slow. Intersystem testing can be time-consuming and tedious, especially if test automation has not been done. It can also be expensive if the system is run several times iteratively.

  24. Intersystem testing is used to ensure the interconnection between the application functions correctly . Its validates the system based on how the different system are interconnected to complete the end to end flow of data.
    Advantage : easy to access and user friendly.
    Disadvantage : Cost may be more and time consuming.

  25. 1. Inter system testing helps to checks the data flow between single software at different locations and also between different systems/ applications that are interconnected and makes sure that the application functions correctly.
    2. Advantages:
    a. Makes sure that the data flow between the deffrent applications is correct.
    Disadvantages:
    a. Since this kind of software involves complex program there will be chance for more errors hence risk of failure will be more.
    b. Time taking

  26. 1. What is the use of Intersystem testing?
    testing done to check to flow between two or more software used are interconnected.
    2. What are the advantages and disadvantages of intersystem testing?
    advantage: user friendly and easy access.
    disadvantage: the cost

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