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Design Test Case Technique (Equivalence partitioning And Boundary value analysis)

The document outlines a 120-minute training course on designing test cases using equivalence partitioning and boundary value analysis. Participants will learn to identify equivalence classes, define test cases, and apply boundary analysis to enhance test case design. Key concepts include valid and invalid equivalence classes, as well as practical examples relevant to user login and search functionalities.

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1 Design test case technique Equivalence partitioning And Boundary value analysis Estimated Time: 120 mins Trainer: Tran Thanh Tuan
At the end of this course, you are going to know: To provide an approach to design test case. Understand how to apply equivalence partitioning and boundary to design test case. PurposePurpose
1.Introduction 2.What is equivalence partitioning? 3.Identify equivalence classes 4.Define the test cases 5.Combining with boundary analyze to choose data 6.Examples 7.Q&A OutlineOutline
IntroductionIntroduction Google search : how many test cases do we need?
Advantages of EPAdvantages of EP - To reduce the number of test cases to a necessary minimum - To select the right test cases to cover all possible scenarios ( of course not to be absolutely sure)
What is EP?What is EP? Input, output domain Equivalence classes
How to use to design testcaseHow to use to design testcase Test case design by EP proceeds into 2 steps: - Identify equivalence classes - Define the test cases
1. Introduction 2. What is equivalence partitioning ? 3. Identify equivalence class 4. Define the test case 5. Combining with boundary analyze to choose data 6. Examples 7. Q&A OutlineOutline
• Input, output: clue from requirement • Equivalence classes are of 2 types: valid and invalid • Ex: identify equivalence classes for this requirement “ if a pupil has total score >= 75, he will pass the exam, otherwise will fail (total score is an integer)” Identify equivalence classesIdentify equivalence classes
Identify equivalence classesIdentify equivalence classes Total score Error messageSystem Fail Pass
Valid equivalence classes Invalid equivalence classes Total score 1. >=75 2. <75 3. Null 4. String Result of the exam 5. Pass 6. Fail 7. Error message Identify equivalence classesIdentify equivalence classes
1. Introduction 2. What is equivalence partitioning ? 3. Identify equivalence class 4. Define the test case 5. Combining with boundary analyze to choose data 6. Examples 7. Q&A OutlineOutline
• Assign a unique number to each equivalence class • For valid case: until all valid equivalence classes have been covered by test case, write a new test case covering as many uncover valid equivalence classes as possible. • For invalid case: until all invalid equivalence classes have been covered by test case, write a new test case that cover one, and only one, of the uncovered invalid equivalence classes. Define test casesDefine test cases
• Example: write test case for “ if a pupil has total score >= 75, he will be past the exam, otherwise will fail ”, using equivalence partitioning. Define test casesDefine test cases Conditions Valid equivalence class Invalid equivalence class Total score 1. >=75 2. <75 3. Null 4. String Result of the exam 5. Pass 6. Fail 7. Error message Test case: • 1, 5 • 2, 6 • 3, 7 • 4, 7
1. Introduction 2. What is equivalence partitioning? 3. Identify equivalence classes 4. Define the test cases 5. Combining with boundary analyze to choose data 6. Examples 7. Q&A OutlineOutline
Boundary analyze and EPBoundary analyze and EP What is Boundary analyze? - Is a technique to refine equivalence partitioning - Concentrate on cases at the extreme ends of each equivalence class.
Boundary analyze and EPBoundary analyze and EP Boundary values
Boundary analyze and EPBoundary analyze and EP Boundary value analysis? - Is to use input variable value at the minimum, just above minimum, just below minimum, normal, at the maximum, just below maximum, just above maximum
Boundary analyze and EPBoundary analyze and EP Example: • “ if a pupil has total score >= 75, he will pass the exam, otherwise will fail (total score is an integer)” Conditions Valid equivalence classes Invalid equivalence classes Total score 1. >=75 2. <75 3. Null 4. String Result of the exam 5. Pass 6. Fail 7. Error message Test case: 1. 1, 5 2. 2, 6 3. 3, 7 4. 4, 7 Data to test: 1a. 75, pass 1b. 76, pass 2. 74, fail 3. Null, error message 4a. A, error message 4b. I am a tester of EW and I love this job, error message
1. Introduction 2. What is equivalence partitioning? 3. Identify equivalence classes 4. Define the test cases 5. Combining with boundary analyze to choose data 6. Examples 7. Q&A OutlineOutline
1. Login function - Requirement: The Registered User enters credentials – a username and password – and submits the credentials. The System verifies the user’s credentials. The System presents the homepage with hello user name and log out link. If the user has been inactive, the system presents a message indicating that the account has been inactive. If invalid username or password, the system determines that the combination of username and password is in error. ( username: maximum 25 chars, not have space, unique, a-z, A-Z, number, password: minimum 6 chars long) ExamplesExamples
ExamplesExamples Database Homepage System Password Username Button Submit Error message of username or password is incorrect Error message of inactive account Nothing happen Relation of username and password
• Identify equivalence class: ExamplesExamples
• Identify test case Valid case – 1,2,3,4,5,12,13,14,18,20,21,24,27 – 1,2,3,4,12,13,14,18,20,21,25,27 Invalid case – 1,6,12,13,14,19,22,21,24,28 – 7,12,19,22,21,25,28 – 8,4,5,14,19,22,21,25,28 – 9,1,2,3,4,12,18,20,21,24,29 – 10,14,18,22,21,24,28 – 11,13,19,21,22,24,28 – 1,3,4,15,19,20,23,25,28 – 1,3,4,16,19,20,24,28 – 1,3,4,17,19,20,24,28 – 1,3,4,12,13,18,25,26,30 ExamplesExamples
1. Search function - Requirement: User fill in search field then click search. The system will find all search string in the document and highlight them. If no one is found, message on form to indicate no result found. ( search like Notepad) ExamplesExamples
ExamplesExamples Relationship of search text and search data Search Search data Search text Message indicates that no search found Highlight all the occurrences of the search text in the search data Nothing happen Button Search Relationship of search text and button Search
• Identify equivalence class: ExamplesExamples
• Identify test case Valid case – 1,10,12,13, 17,21,22 – 2,10,12,14,18,21,25 – 3,4,5,6,7,8,10,12,14,17,21,25 Invalid case – 9,21 – 3,4,8,11,12,17,21,24, 26 – 3,6,7,10,13,15,18,21,22 – 3,10,12,14,19,20,23 ExamplesExamples
One page summaryOne page summary
• To provide an approach to design test case  • Understand how to apply equivalence partitioning and boundary analysis to design test case  PurposePurpose
1. Introduction 2. What is equivalence partitioning? 3. Identify equivalence classes 4. Define the test cases 5. Combining with boundary analyze to choose data 6. Examples 7. Q&A OutlineOutline
Q&AQ&A
ReferencesReferences • The art of software testing • Internet
Thank you!!!