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DECISION TABLE TESTING

BLACK BOX TESTING TECHNIQUE

Decision table testing is one of the test design techniques for black box testing or specification based testing. The different possible input and output logical conditions are identified for testing. Software testing can be classified as white box testing and black box testing. The test design techniques are used for both white box testing and black box testing to design the test conditions.

Decision Table testing:

Decision table deals with the combination of various inputs in order to produce the expected output. Basically it involves the conditions to the data while testing.

For example: A customer feedback software is to be developed for a restaurant. After ordering food customers provide the rating based on two things firstly food serving time and taste of food. Whether the ordered food is served on time and whether it tastes good? The customers can choose between two different conditions and we could identify how many combinations we can make out of these two conditions for testing the software.

The food may be served late and its not tasty.

The food may be on the time and its not tasty

The food is not on time but its tasty

The food is on time and its tasty.

Based on these conditions you make some decisions whether the  restaurant is good or bad and take some actions based on this decisions.It is also called as cause – effect table which involves logical diagrammatic representation which helps to derive the decision.

Check your understanding:

  1. A university allocates the space to students on its server to store assignments. The students can login using their student accounts. The student can continue to store new files if they have not used up existing spaces. Identify the different test conditions for testing. Hint: login, upload and delete files are the 3 functionalities available for testing. Use decision table technique. CLICK HERE TO VIEW SOLUTION.
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34 thoughts on “DECISION TABLE TESTING”

  1. Different test conditions for testing are:
    Login:
    Valid username and valid password
    Valid username, invalid password
    Invalid username, valid password
    Valid username, password blank
    Username blank, password valid
    Username and password blank
    Upload:
    Space available: The student can upload the files.
    No space available: The students cannot upload the files and should delete old files to upload new ones.

  2. Login:
    Username valid, password invalid
    username valid , password valid
    username invalid, password valid
    username invalid, password invalid
    username and password blank
    username valid , password blank
    For upload:
    Space available to upload
    space not available , need to delete some files

  3. Testing conditions:
    Login:
    Valid Username, Valid Password
    Invalid Username, Valid password
    blank username, valid password
    valid username, invalid password
    invalid username, invalid password
    blank username, blank password

    Upload:
    Upload-
    Space available, files space
    space available, file blank
    space unavailable, delete old files

  4. Conditions
    Log in
    valid user name False , True , True , True
    valid password False , False, True, True
    space in account Blank , Blank ,False, True

    Space available
    Log in accepted False, False, True , True
    Restricted access Blank, Blank ,True ,False

  5. Login:
    Valid username and valid password
    Login- Valid username, invalid password
    Invalid username, valid password
    Valid username, password blank
    Username blank, password valid
    Username and password blank
    Upload:
    Space available: The student can upload the files.
    No space available: The students cannot upload the files and should delete old files to upload new ones.

  6. Answer:
    Login
    1. Username : valid 2. IV 3. V 4. V
    Password: valid V IV V
    Depending on Space Availability: upload: valid – IV IV
    Delete: Valid _ IV V

  7. Login:
    Username Valid, Password Valid, click Sign In, Login
    Username Valid, Password Invalid, click Sign In, Error message
    Username Invalid, Password Invalid, click Sign In, Error message
    Username Blank, Password Blank, click Sign In, Error Message
    Upload:
    Upload File Valid, click Upload, Check available storage, if available storage, Upload successful
    Upload File Valid, click Upload, Check available storage, if no available storage, Message displayed
    Upload File Invalid, click Upload, Error message
    Upload File Blank, click Upload, Error message
    Delete:
    Choose File to delete valid, click Delete, Delete successful
    Choose File to delete Invalid, click Delete, Error message
    Choose File to delete Blank, click Delete, Error message

  8. 1. Login Page
    Login with valid username and password in given web page. The Student page opens.
    Login with Invalid username and password. The page doesn’t open gives error message.
    Blank username and password. Pops up error message box.
    Upload files
    Space available- upload file
    Space unavailable- cannot upload file
    Delete File
    delete file- can upload file

  9. Testing conditions;
    Login:
    Valid username,valid password
    invalid username,valid password
    valid username,invalid password
    username blank,password valid
    username valid,password blank
    upload:
    Space available-student can upload the file
    space not available-student can not upload the files,has to delete old files to upload new ones.

  10. Login functionality-
    1. Valid Username and Password – result- Pass
    2.Invalid Username and Password – result- Fail
    3.Valid Username and Invalid Password – result-Fail
    4.Invalid Username and Valid Password – result-fail

    Uploading functionality-
    space available – student can load the new files – result- Pass
    space unavailable – student can not load the new files – result-Fail
    space unavailable – student can delete existing files and can load new files – result- Pass

  11. Login scenario:
    1.student account valid login successful
    2.student account invalid login failed fields reset
    3.student account left blank login failed fields reset

    Uploading student files:
    1.Free space available files is uploaded.
    2.Free space not available file is not uploaded displays error message.
    3.Free space not available file is not uploaded request to delete or archive unused files to create more space.

  12. login-username-valid-pass. upload file-click button-choose file-space available- pass
    password-valid-pass. upload file-click button-choose file-space not available -fail
    username-valid-fail
    password-invalid-fail
    username-invalid-fail
    password-valid-fail
    username-blank-fail
    username-blank-fail

  13. 1. Username – Valid, Password -Valid,
    Login – Pass , upload or delete files can be done.

    2. Username – valid, Password – invalid
    Login – fail, upload or delete files cannot be done.

    3. Username – invalid , Password – invalid
    Login – Fail, upload or delete files cannot be done.

    4. Username – invalid, Password – valid
    Login – Fail, upload or delete files cannot be done.

  14. Functionality: Login
    1. Username-F, password- F Space in account-T. Expected result= fail
    2. username-T, password-F, space in account-F. Expected Result=fail
    3. username -F, password-T, space in account-F. Expected Result=fail
    4. username-T, password-T, Space in account-F. Expected result= pass
    5. username-T, password-T, Space in account-T. Expected result=pass
    Functionality: upload
    1. Upload files with Space =False (invalid)
    2. Upload files with no space=True (Valid)
    3. Upload files Blank=False(Invalid)

    Functionality: Delete Files
    1. Delete old files
    2. Delete New files
    3. Delete blank.

  15. Different Testing Condition:-
    Input condition
    1.User Name valid 2. User Name invalid 3.username valid 4. username blank
    Password valid Password Valid password invalid password valid
    Login:pass Login:fail login:fail login:fail

    1. Out put condition 2. Out put condition:fail 3.output condition:fail 4.output condition:fail
    Space available ,upload file file cannot be uploaded file cannot be uploaded file cannot be uploaded
    No space available,delete file

    5. username valid
    password blank
    login:fail
    output condition:fail
    file cannot be uploaded

  16. Different test conditions for testing
    Username- valid, password- valid, space available=upload the files(maybe delete old files)
    Username- valid, password- valid, space not available=upload the files(Must delete the files)
    Username- valid, password- invalid
    Username- valid, password- Blank
    Username- invalid, password- valid
    Username- blank, password- valid
    User name:blank, password:invalid

  17. Conditions Test case. ( pass, Fail)
    1. 2. 3. 4
    Valid username P. F. P. P
    Valid p/ wd. – P P. P
    Space in account. – – – P

    ACTIONS
    Login accept. P. F. P. P
    Restrict new files. – – P. F

  18. The different test condition for testing are as follows:
    Login
    Username:valid and password:invalid login is pass files are uploaded
    Username:invalid and password:valid login is fail files cannot upload
    both username and password is blank login is fail file cannot upload
    Username valid and password is blank login is fail error message is displayed
    Upload
    Upload files without space is valid delete the files
    Upload files with space is invalid delete old files
    Upload files with blank is invalid

  19. Different test cases for Student Login in University Webserver.
    1.Valid Username,Valid Password- Login -Upload files (in existing space)
    2.Valid Username ,Valid Password- Login-Cannot upload files(No existing space)
    3. Valid Username, Valid password- Login-Upload files (delete old file)
    4. Valid Username,Invalid password- error message displays
    5.invalid username, valid password- error message displays
    6.username ,password blank-error message displays

  20. User name- valid, password valid- login and upload files
    User name – invalid , password valid – login fail
    User name – valid , passworrd invalid – login fail
    User name invalid , password blanck – login fail

  21. Possible combinations/Conditions:

    000
    100
    110
    010
    011
    001
    101

    Login – no
    User name-no
    Delete-no

    Login-yes
    User name-no
    Delete-no

    Login-yes
    User name-yes
    Delete-no

    Login-no
    User name-yes
    Delete-no

    Login-no
    User name-yes
    Delete-yes

    Login-no
    User name-no
    Delete-yes

    Login-yes
    User name-no
    Delete-yes

  22. Username Valid, password valid, space to use – Pass
    username Valid, password invalid , space to use- Fail
    username Invalid , password valid , space to use -Fail
    username Invalid, password invalid, space to use – Fail
    username Valid , password valid, no space to use – Fail
    username Valid, password invalid, no space to use – Fail
    username Invalid , password valid, no space to use- Fail
    username Invalid, password invalid , no space to use- Fail

  23. 1) Valid username and valid password – login successful- logged in – Files uploaded successfully.
    2) Invalid username and invalid password- login unsuccessful – error message displayed
    3) Blank username and blank password – login unsuccessful- error message displayed
    4) Valid login – logged in – files cannot be uploaded- error message displayed – “delete old files no space”
    5) valid login – logged in – files cannot be deleted – error message displayed
    6) valid login – logged in – old files deleted and new files uploaded successfully

  24. The different test condition for testing are as follows:
    Login
    1.
    Username: valid
    password: valid
    Space: Yes
    Output: login is pass files are uploaded
    2.
    Username: valid
    password: valid
    Space: No
    Output: Login is pass but files cannot upload because there is no space
    3.
    Username: invalid
    login is fail
    Space: Doesn’t matter because you cannot enter system
    Output: Login is fail and You cannot enter the system
    4.
    Username valid
    password is invalid
    Space: Doesn’t matter because you cannot enter system
    Output: Login is fail and you cannot enter the system.

  25. Test condition:;
    user name : Valid Password:Invalid: Error message displayed
    Username:Invalid Password:Valid Error message displayed
    User name:Invalid Password:Invalid Error message displayed
    User name : Valid Password: Valid Log in successful :upload files if there is enough space
    User name: Valid Password:Valid Log in successful:delete file (not enough space )

  26. Test condition:
    1. Username: Valid , Password: Valid -> Login successful -> Upload files in existing space
    2. Username: Valid , Password: Valid ->Login ->Upload files -> No space -> Cannot Upload files
    3. Username: Valid ,Password: Valid -> Login -> Upload files -> No Space -> delete Files
    4. Username: Invalid ,Password: Valid -> Login failed
    5.Username: Valid ,Password: Invalid -> Login failed
    6.Username: Blank ,Password: Invalid -> Login failed
    7.Username: Valid ,Password: Blank-> Login failed

  27. The different test conditions are :

    [ T – True/Correct
    F – False/Wrong
    E – Error message is displayed
    A – Access to store/update the files ]

    CONDITIONS RULE 1 RULE 2 RULE 3 RULE 4 RULE 5
    ….INPUT…..
    Username F T F T T
    Password F F T T T
    Server Space – – – F T

    ….OUTPUT….
    Login E E E A A
    Upload E E E E A
    Delete E E E A A

  28. Condition # 1 – Valid / existing space : Login Functionality
    – Login using valid user name, pw : enter into the account and store files.
    Condition # 3 – Valid / no space
    – Login using valid user name, pw : enter into the account and but cannot store files as there is no space to save extra files.
    Condition # 3 – Invalid
    – Invalid user name, pw : error message, cannot enter into the account.
    Condition # 4 – Blank
    – Login by not entering any values in the user name, pw : error message, cannot enter into the account.

  29. Login,Upload,Delete are Three Functionalities:

    1.User Name-Valid,Password-valid,Login= T (Login Successfully)
    2.User Name-Valid,Password-Invalid,Login= F
    3.User Name-Invalid,Password-Valid,Login = F
    4. User Name-Invalid,Password-Invalid,Login= F
    5.User Name-Blank,Password-valid,Login= F
    6.User Name-Valid,Password-Blank,Login= F
    7.User Name-Blank,Password-Blank,Login=F

    Upload :(if Login is successful)

    1.Enough Space-Can Upload or DeleteFiles.
    2.Not Enough Space-Delete Existing or Unused Files and Can upload
    3.Enough space but unable to upload(in that case file extension is wrong or uncorrupted version of the file)

  30. VALID USER NAME ID +VALID PASSWORD =LOGIN SUCCESSFUL
    INVALID USERNAME + VALID PASSWORD = F
    VALID USERNAME + INVALID PASSWORD = f
    INVALID USERNAME +IVALID PASSWORD = f
    lOGIN-T +UPLOAD-T = UPLOAD FILES
    LOGIN – F + DELETE PREVIOUS FILES = F
    LOGIN T + DELETE PREVIOUS FILES = UPLOAD FILES

  31. 1. Username ID – valid
    Password – valid
    Login – Accepted – end result – pass
    2. Username – invalid
    Password – error message – end result – fail
    3. Username – valid
    Password – error message – end result – fail
    4. Username – invalid
    Password – Valid – end result – fail

  32. login – Valid
    Login – Invalid
    Upload file – No space available
    Upload file – Space available
    Delete file – successful

  33. 1) Valid username and valid password – login successful- logged in – Files uploaded successfully.
    2) Invalid username and invalid password- login unsuccessful – error message displayed
    3) Blank username and blank password – login unsuccessful- error message displayed
    4) Valid login – logged in – files cannot be uploaded- error message displayed – “delete old files no space”
    5) valid login – logged in – files cannot be deleted – error message displayed
    6) valid login – logged in – old files deleted and new files uploaded successfully

  34. Valid user name : F T T T
    Valid password : F T T
    Space in account : F T
    Out put
    Log in accepted: F F T T
    restricted access : T F

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