Another handy way of filling in the decision table is with the use of the so called “Gray-code”. Let’s understand this with an example, how to calculate statement coverage. For example, my test report points out that on an if-condition that checks two boolean flags, it insists that all 4 possible combinations have to be checked before 100% coverage is attained.
- A less aggressively optimized set of test cases for basic condition coverage would have one test case where all three basic conditions are false and three test cases with a different basic condition true in each.
- Finite state machine coverage is certainly the most complex type of code coverage method.
- The target software is built with special options or libraries and run under a controlled environment, to map every executed function to the function points in the source code.
- Everett & McLeod’s “Software Testing” says “simple condition coverage” and “compound condition coverage”.
- The goal of Statement coverage is to cover all the possible path’s, line, and statement in the code.
However for MCDC the above test cases are not sufficient because in MCDC each Boolean variable should be evaluated to TRUE and FALSE at least once and also affect the decision outcome. Connect and share knowledge within a single location that is structured and easy to search. We bought you news earlier of Israeli tanks that have today taken up positions at the gates of Gaza City’s main hospital, their primary target in their battle to seize control of the northern half of the Gaza Strip. The higher the probability that defects will cause costly production failures, the more severe the level of coverage you need to choose.
Decision Coverage is a white box testing technique which reports the true or false outcomes of each boolean expression of the source code. The goal of decision coverage testing is to cover and validate all the accessible source code by checking and ensuring that each branch of every possible decision point is executed at least once. A less aggressively optimized set of test cases for basic condition coverage would have one test case where all three basic conditions are false and three test cases with a different basic condition true in each. That would still only be four of the eight possible combinations of basic conditions in the compound condition. The uncomfortable feeling that we’re ignoring the other four is why there’s compound condition coverage. That requires a test for each possible combination of basic conditions in a compound condition.
For example, if the outcomes are binary, you need to test both True and False outcomes. Assume this function is a part of some bigger program and this program was run with some test suite. According to this explanation, there are 4 test cases for 2 conditions.
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Here we are taking two different scenarios to check the percentage of statement coverage for each scenario. White box testing is a software testing technique that involves testing the internal structure and workings of a software application. The tester has access to the source code and uses this knowledge to design test cases that can verify the correctness of the software at the code level. In order to ensure complete Condition coverage criteria for the above example, A, B and C should be evaluated at least once against “true” and “false”. And for each alteration of your code, it verifies if the test actually fails. This is good indicator of the quality of your test suite and ensures that code is not just covered but your tests for the code are actually valid.
SonarQube – is Condition coverage actually the branch coverage?
Line coverage reports on the execution footprint of testing in terms of which lines of code were executed to complete the test. Edge coverage reports which branches or code decision points were executed to complete the test. The meaning of this depends on what form(s) of coverage have been used, as 67% branch coverage is more comprehensive than 67% statement coverage. In case the decision is a condition (i.e. just a), that is also called basic condition coverage, which is the coverage of the two branches of a single condition. Branch Coverage is a white box testing method in which every outcome from a code module(statement or loop) is tested. The purpose of branch coverage is to ensure that each decision condition from every branch is executed at least once.
There are also some sorts of defects which are affected by such tools. Unlike Condition Coverage a) all possible combinations and b) the decision outcomes are considered. I might be missing something here but, the way you wrote the code in your question, conditions A and B are completely independent of each other. You therefore won’t cover all of the code unless you test both conditionals. In MCDC each condition should be evaluated at least once which affects the decision outcome independently. Condition coverage is also known as Predicate Coverage in which each one of the Boolean expression have been evaluated to both TRUE and FALSE.
In this coverage, expressions with logical operands are only considered. The target software is built with special options or libraries and run under a controlled environment, to map every executed function to the function points multiple condition coverage in the source code. This allows testing parts of the target software that are rarely or never accessed under normal conditions, and helps reassure that the most important conditions (function points) have been tested.
White box testing is also known as structural testing or code-based testing, and it is used to test the software’s internal logic, flow, and structure. The tester creates test cases to examine the code paths and logic flows to ensure they meet the specified requirements. White box testing techniques analyze the internal structures the used data structures, internal design, code structure, and the working of the software rather than just the functionality as in black box testing. It is also called glass box testing or clear box testing or structural testing. White Box Testing is also known as transparent testing or open box testing.