Example of Branch Coverage in Unit Testing
Consider the following simple function that determines whether a person is eligible to vote based on their age. The function has two conditional statements (if and else) and one unconditional print statement. Branch coverage in unit testing for this function aims to cover all possible branches, including both conditional and unconditional statements.
checkAge(int age) {
if (age >= 18)
print(“Eligible to Vote”)
else
print(“Not Eligible to Vote”)
print(“Print the Age: %d” + age)
}
Branch Coverage Test Cases
- Test Case 1 (True Positive): Create a test case to cover the if condition by providing an age greater than or equal to 18. This scenario represents a True Positive, where the individual is eligible to vote. This test case covers the if part of the function.
- Test Case 2 (False Positive): Generate a test case to cover the other condition by providing an age less than 18. This represents a False Positive scenario, where the individual is not eligible to vote. This test case covers the other part of the function.
- Test Case 3 (Print Statement): Design a test case to cover the print statement by providing mock data for age and verifying that the age is printed correctly. This test case ensures coverage of the common print statement executed in the function.
What is Branch Coverage in Unit Testing?
Unit Testing is the process of writing the test cases for each developed code file. This testing is carried out by developers. Once the coding part is done, the developers will write the test cases to cover each scenario in the developed file. While running the test suites or test files, we can see there are four parts of coverages. They are Branch Coverages, Statement Coverages, Functions Coverages, and Condition Coverages. It includes the percentage covered for each coverage category. In this article, we will explore the concept of Branch Coverage in Unit Testing.
Table of Content
- What is Branch Coverage in Unit Testing?
- What is the Purpose of Branch Coverage in Unit Testing?
- What are Branch Coverage Metrics?
- Example of Branch Coverage in Unit Testing
- Tools Used for Branch Coverage in Unit Testing
- Advantages of Using Branch Coverage in Unit Testing
- Disadvantages of Using Branch Coverage in Unit Testing
- Conclusion