Categorizations as such provide us some help in that they ease up our conversation and point out our focus in designing test cases, the categorization should definitely not be treated dogmatically. Professional testers nowadays even combine or integrate the corresponding techniques in exploratory testing. The loop testing method supports single, concatenated, and nested loops.

Decision Coverage Testing in White Box Testing

In this technique, it is tough to get 100% coverage because expressions get complicated. All these methods cover the foremost important combinations and really much almost like decision coverage. The advantage of these methods is enhancement of the sensitivity of control flow. That’s why there are many different methods of reporting this metric. All these methods focus on covering the most important combinations. It is very much similar to decision coverage, but it offers better sensitivity to control flow.

Which Type of Code Coverage to Choose

Black box testing is a software testing methodology in which the tester analyzes the functionality of an application without a thorough knowledge of its internal design. Conversely, in white box testing, the tester is knowledgeable of the internal design of the application and analyzes it during testing. Decision coverage is a frequently used code testing method which is used to validate the exposure of the limitations of various decision trees in the program. The decision trees are typically derived from the conditional statements, the looping statements and the Boolean expressions or values in the program. The testing process in this case is carried out by validating all the possible execution flow through the said conditions and looping statements. Hence the name ‘Decision Coverage’ testing was given to this process.

Decision Coverage Testing in White Box Testing

Condition Coverage or expression coverage is a testing method used to test and evaluate the variables or sub-expressions in the conditional statement. The goal of condition coverage is to check individual outcomes for each logical condition. Condition coverage offers better sensitivity to the control flow than decision coverage.

Black Box Techniques

It covers numerous test cases, allowing maximum bugs to be discovered. This testing method is used at all stages of the software development cycle. Black box testing mainly focuses on the comprehensive examination of application functionality. It is closely related to behavioral testing; however, behavioral testers may have limited knowledge of internal application workings. Developing white-box software testing, it is a valuable method for carrying it out. Even while this testing strategy can be costly and time-consuming, it is still the only method to ensure that you test all aspects of the code.

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White box testing is an approach that allows testers to inspect and verify the inner workings of a software system—its code, infrastructure, and integrations with external systems. White box testing is an essential part of automated build processes in a modern Continuous Integration/Continuous Delivery (CI/CD) development pipeline. In-depth knowledge about the programming language is necessary to perform white box testing. Condition coverage, also known as expression coverage, is a testing method for testing and evaluating the variables or sub-expressions in a conditional statement.

Curated for all your Testing Needs

Boundary value analysis is among the necessary black box testing techniques that check boundary values that are prone to error. The tester checks whether the software produces the correct output upon entering the boundary value. The statement coverage technique is used to design test cases for white box testing which involves the execution of all the statements of the source code at least once. Using above mentions testing white box testing techniques the 80% to 90% code coverage is completed which might be sufficient with white box testing.

Decision Coverage Testing in White Box Testing

Unit testing – Unit testing tests all written code to see if it works as expected. The tester must analyze transition data and design test cases to probe what happens when the system transitions from one state to another and does not give desired outputs. State transition testing uses inputs to check for the desired output. The objective of state transition testing is to see if there is a change in the system during the transition from one state to another. Equivalence partitioning divides data into partitions of valid and invalid values wherein the partitions exhibit the same behavior. If a condition of one partition is false, then the condition of the other partition should also be false, and vice-versa.

Online Browser Testing

The other names of glass box testing are clear box testing, open box testing, logic driven testing or path driven testing or structural testing. In this type of testing, the logical conditions for every value are checked, whether it is true or false. This means that both the if and else conditions are verified, in the case of an IF-ELSE conditional statement. The test cases will be written by the tester by dividing the applications into categories as Statement/Decision/Condition/Branch.

  • It is leveraged to ensure that every application path is utilized at least once.
  • Testers, using this technique, select a specific part of the application for setting the testing path.
  • The test cases are represented using the control graph of the program.
  • It’s most often used at the component level (so-called unit testing), but it can also be performed at any other test level utilizing the various white-box models of the system.
  • Expensive as one has to spend both time and money to perform white box testing.

Because this testing is dependent on the program’s control structure, it involves a thorough understanding of the program’s structure. Decision testing is also called as branch testing which is a testing technique of white box testing. Decision testing is a process which checks the behavior of the application by providing different combination of inputs and obtaining various results. Whereas 100% decision coverage can be achieved when all the possible paths between start to end are covered. Meaning all “True or False” possible outcomes are tested to verify the behavior of the software. In statement coverage testing, 100% statement coverage is said to be achieved if all the statements are tested at least once.

The basis for test cases is the software requirement specification document. Testing generally begins after preparing the requirement specification paper, and involves the developer, tester, and end user. In this example, the testing team has reduced the cases to only three, allowing all possible scenarios to be tested within a few moments. Finally comes the execution phase, where the testing is completed, and any issues are recorded for fixing.

Coverage is 100 percentage when a set of test cases causes every program statement to be executed at least once. Once the code for the application is complete, this tool will go through the entire code while executing it and the outcome would be displayed in the shape of thick and thin lines on a result sheet. An application might be slow due to several factors and a developer or tester can’t go through each line of code to detect a bug and verify it. There are some other tools as well available in the industry for the same purpose, such as WebLOAD, LoadNinja, LoadView, and StresStimulus. Loops are one of the fundamental concepts that are implemented in a large number of algorithms. Loop Testing is concerned with determining the loop validity of these algorithms.

Software Testing Tools

This graph is used to identify all object relationships, write test cases, and test for error discovery. Guessing the errors that might arise in the application is a key example of this technique. Here, the testing team leverages its experience around the application’s behavior and its functionalities to find the areas prone to errors.