Tuesday January 21, 2020
Code coverage and test coverage are the metrics of software testing. Before explaining in detail the code coverage and test coverage, have a look at what software testing exactly is. Software testing is checking whether the software developed turned out like how it was supposed to turn out.
Now, even if just the number of main types of software testing is counted, that would itself result in somewhere around a hundred. These types of software tests are used according to the type of software and the developer’s choice.
Let’s have a look at the software metrics.
What is Code Coverage?
Code coverage is the degree to which any application code of any software has been executed. A huge number of test cases are applied to the application code, and the software is then checked. This is a case of white box testing.
White-box testing of this type sends the report of the application codes that are left unassessed by the test case that has been applied to the application code. In some specific situations, several test cases are further included to have better code coverage.
Usually, the term code coverage is used when an application is in the current running state. While the application is running, code coverage lets the developers know about the number of codes that have been tested. In other words, it gives a quantitative measure of how much code has been executed and how much code has been left untouched. This report can further be used for better software testing purposes.
After learning what code coverage is, a question pops up about why someone would need the concept of code coverage. This is a confusion in the minds of many. Here is a brief description of why we need code coverage during software testing.
Why is Code Coverage Required?
After the reason for the necessity of the code coverage is discussed, the next comes to the methods to carry out software testing. Here are the five broadly classified methods or coverages that come under code coverage.
Methods of Carrying out the Code Coverage
Statement coverage covers the entire source code and gives out what is not executed. This turns out to be very advantageous to the developers as they can remove all the drawbacks of the application codes.
Statement coverage helps to remove the possible drawbacks of the application code which includes all the dead codes which are the piece of code that calculates the results, but the results are never utilized. These codes are a wastage of space and hence are supposed to be removed.
Statement coverage also helps to identify the unused statements and branches. There are certain statements and branches in application code that are never used. These statements and branches should be removed. Any missing statement is also reported, and the developers can deal with it as they please.
Now, one might be confused as to which method should be chosen for the task that would prove the most efficient one. This decision is made on many criteria. Some of the criteria include the number of defects permissible or the probability of errors arising. Another one would be the cost that is involved in the software testing type.
Though the main decision of choosing the method is dependent on the number of defects or loss of sale that can occur. The higher is the number of defects probable, the lower would be the chances of using that specific coverage for the software testing.
What are the Advantages of Using Code Coverage?
After reading the information above, it is normal to have confusion regarding why anyone should choose code coverage over any other coverage. Here, the advantages provided by the code coverage is mentioned below:
But just like every coin, even code coverage comes with its own set of limitations and disadvantages.
What are the Disadvantages of Code Coverage?
This was code coverage. Test coverage is another software testing metric with a little bit of difference.
What is Test Coverage?
Test coverage can often be confused with code coverage, but the truth is that it is quite different. Test coverage provides the amount of test that has been executed. It reports about the parts of the application that are running when the coverage is being implemented. It gives the report of the tests that have been carried out on the application. We can say it is more about the test instead of application codes.
Why do We use Test Coverage?
When there are so many coverages out there, what was the need for test coverage in such a situation? The answer to this question is given below:
What are the Advantages of Test Coverage?
Test coverage provides some special features that prove advantageous for the developers.
What are the Disadvantages of Test Coverage?
The test coverage also has its own set of drawbacks, which can make any developer hesitate from using the test coverage.
The disadvantages are listed below:
Code Coverage vs. Test Coverage
|It refers to the execution of the application code while the application is running.||It is not a specific plan or result but the overall test plan issued for the codes.|
|2.||Aim of the coverage||The automated tests that are running can be monitored by the developers suing code coverage.||It gives a measure of the amount of code that has been processed and run by the tests.|
|3.||Subtypes of the coverage||Code coverage has a number of subtypes which include statement coverage, condition coverage, Branch coverage, Toggle coverage, FSM coverage.||Test coverage has no subtypes. It is all just complete in itself.|
Both code coverage and test coverage are the measurements of assessing the quality of the software testing that is being carried out. Both are extremely essential when it comes to the software testing and checking of the internal coding and structure of the system.
In layman terms, the code coverage metric tells about the application code that is being executed. While the test coverage is mainly focused on the overall test plan. Everything is done only to focus on the well functioning of the software that is supposed to be launched.