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What is code coverage statement?
Statement coverage is a white box testing technique, which involves the execution of all the statements at least once in the source code. It is a metric, which is used to calculate and measure the number of statements in the source code which have been executed. This is purely a white box testing method.
Which is not covered by statement coverage?
Statement coverage does not call for testing simple if statements. A simple if statement has no else -clause. To attain full statement coverage requires testing with the controlling decision true, but not with a false outcome. No source code exists for the false outcome, so statement coverage cannot measure it.
How do you get 100 statement coverage?
To calculate statement coverage of the first scenario, take the total number of statements that is 7 and the number of used statements that is 6. But, we can see all the statements are covered in both scenario and we can consider that the overall statement coverage is 100%.
When can we say 100% path coverage is achieved?
To achieve 100% path coverage, every path from the entry node to the exit node of the CFG of the program must be traversed during at least one execution of the program.
How many tests are needed for 100 statement coverage?
There are two major types of White box testing techniques: Statement coverage testing and branch coverage testing. To achieve 100% statement coverage we need to check only one test case here. We ensure that A value is greater than B for input values like A=14 and B=11.
Does 100% statement coverage mean 100% branch coverage?
For a test set to achieve 100% branch coverage, every branching point in the code must have been taken in each direction, at least once. The archetypical example, showing that 100% statement coverage does not imply 100% branch coverage, was already given by Alexey Frunze.
What do you mean by branch, statement, function coverage?
To understand these methodologies, let’s take a look at the below code snippet: This methodology is a measure that tells if all possible executable statements of code in source code have been executed at least once. It is a method to ensure that each line of the source code is covered at least once by the tests.
How to measure statement coverage in source code?
This methodology is a measure that tells if all possible executable statements of code in source code have been executed at least once. It is a method to ensure that each line of the source code is covered at least once by the tests. This might sound simple but caution needs to be exercised while measuring the Statement Coverage.
How to calculate the code coverage of a function?
Code Coverage can be calculated using the below formula: Code Coverage = (number of lines of code executed/ total number of lines of code)* 100
What is the main purpose of statement coverage?
The main purpose of Statement Coverage is to cover all the possible paths, lines and statements in source code. Statement coverage is used to derive scenario based upon the structure of the code under test.