In this section, we are going to understand Static testing, which is used to check the application without executing the code. And we also learn about static Testing, why we use static Testing, how to perform it, a different technique for static Testing, advantages of static testing, and various Static Testing tools.
Introduction to Static Testing
Static testing is a verification process used to test the application without implementing the code of the application. And it is a cost-effective process.
To avoid the errors, we will execute Static testing in the initial stage of development because it is easier to identify the sources of errors, and it can fix easily.
In other words, we can say that Static testing can be done manually or with the help of tools to improve the quality of the application by finding the error at the early stage of development; that is also called the verification process.
We can do some of the following important activities while performing static testing:
Note: Static testing is performed in the white box testing phase, where the developer checks every line of the code before giving it to the Test Engineer.
Static testing also helps us to identify those errors which may not be found by Dynamic Testing.
Why do we need to perform Static Testing?
We can perform static testing to fulfill the below aspects:
What are the different features we can test in Static Testing?
We can test the various testing activities in Static Testing, which are as follows:
When we performed Static Testing?
To perform static testing, we need to follow the below steps:
Step1: To review the design of the application entirely, we will perform the inspection process.
Step2: After that, we will use a checklist for each document under review to make sure that all reviews are covered completely.
We can also implement several activities while performing static testing, which are discussed in the following table:
Why we need Static Testing?
We required Static testing whenever we encounter the following situation while testing an application or the software:
Dynamic Testing is time-consuming
We need static testing to test the application as dynamic testing is time-taking process even though the dynamic testing identifies the bug and provides some information about the bug.
Flaws at earlier stages/identification of Bugs
When we are developing the software, we cannot completely rely on Dynamic testing as it finds the bugs or defects of the application/software at a later stage because it will take the programmer's plenty of time and effort to fix the bugs.
Dynamic Testing is expensive
We need to perform the static testing on the software product because dynamic testing is more expensive than static testing. Involving the test cases is expensive in dynamic testing as the test cases have been created in the initial stages.
And we also need to preserve the implementation and validation of the test case, which takes lots of time from the test engineers.
Increased size of the software
Whenever we test the software, it will increase the size of the software product, which we cannot handle because of the reduction in the productivity of code coverage.
That is why we require static testing to get free from the bugs or defects earlier in the software development life cycle.
Objectives of Static testing
The main objectives of performing static testing is as below:
Some useful points for Successful Static Testing Process
The following guidelines help us to perform a successful static testing process in Software testing.
Static Testing Techniques
Static testing techniques offer a great way to enhance the quality and efficiency of software development. The Static testing technique can be done in two ways, which are as follows:
In static testing, the review is a technique or a process implemented to find the possible bugs in the application. We can easily identify and eliminate faults and defects in the various supporting documents such as SRS [Software Requirements Specifications] in the review process.
In other words, we can say that a review in Static Testing is that where all the team members will understand about the project's progress.
In static testing, reviews can be divided into four different parts, which are as follows:
Let's understand them in detail one by one:
Another Static Testing technique is static analysis, which is used to contain the assessment of the code quality, which is established by developers.
We can use the different tools to perform the code's analysis and evaluation of the same.
In other words, we can say that developers' developed code is analyzed with some tools for structural bugs, which might cause the defects.
The static analysis will also help us to identify the below errors:
In static testing, Static Analysis can be further classified into three parts, which are as discuss below:
Data Flow: In static analysis, the data flow is connected to the stream processing.
Control Flow: Generally, the control flow is used to specify how the commands or instructions are implemented.
Cyclomatic Complexity: It is the measurement of the program's complexity, which is mostly linked to the number of independent paths in the control flow graph of the program.
Tools used for Static Testing
In static testing, we have several tools in the market, but here we are discussing the most commonly used tools, which are as follow:
It is a development tool that is used to help the developers write Java code, which follows a coding standard. The CheckStyle tool automates the process of checking Java code.
It is a highly configured tool, which is made to support almost any coding standard. The Google Java Style, Sun code conventions are those configuration files, which is supported by CheckStyle.
Feature of CheckStyle
Following are the most common features of CheckStyle:
With the SourceMeter tool's help, we can easily identify the vulnerable spots of a system under development from the source code.
The free version with partial functionality of SourceMeter can be accessible for all programming languages.
In SourceMeter, we can use the output of the analysis, the quality of the analyzed source code to enhance and developed both the short and long term in a directed way.
Feature of SourceMeter
The most commonly used features of the SourceMeter tool are as follows:
It is a Java optimization framework, which means that it is a framework for analyzing and transforming Java and Android applications where we can test the following aspects:
And a Soot can also produce possibly transformed code in the various output formats such as Android bytecode, Java bytecode Jasmin, and Jimple.
Advantages of Static Testing
The advantages of static testing are as follows:
In the Static testing section, we have learned the following topics: