It takes only two test cases, one where all basic conditions are true and one where all are false, to get full basic condition coverage. It doesn’t matter that the basic conditions happen to be part of a compound condition. Regarding terminology, I don’t have a single source handy that uses the exact terms “basic condition coverage” and “multiple condition coverage”. Binder’s “Testing Object-Oriented Systems” says “condition coverage” and “multiple-condition coverage”. Everett & McLeod’s “Software Testing” says “simple condition coverage” and “compound condition coverage”. But I’m certain that the first term in each case is your “basic condition coverage” and the second is your “compound condition coverage”.
Some of the most basic are the percentage of program subroutines and the percentage of program statements called during execution of the test suite. Code coverage is a measure which describes the degree of which the source code of the program has been tested. It is one form of white box testing which finds the areas of the program not exercised by a set of test cases.
Does multiple condition coverage always imply branch coverage?
Decision coverage implies statement coverage, because every statement is part of a branch. Generally in any software, if we look at the source code, there will be a wide variety of elements like operators, functions, looping, exceptional handlers, etc. Based on the input to the program, some of the code statements may not be executed.
The resulting output is then analyzed to see what areas of code have not been exercised and the tests are updated to include these areas as necessary. Combined with other test coverage methods, the aim is to develop a rigorous, yet manageable, set of regression tests. Percentage of combinations of all single condition outcomes within one and the same operator that have been tested by a set of tests. 100% multiple condition coverage presupposes 100% condition determination coverage. C, those two test cases above would still achieve basic condition coverage but would not achieve branch coverage. There is a compound condition, a && b && c, with three basic conditions, a, b and c.
Line Coverage or Statement Coverage
Decisions are the controls that can control the program flow after evaluating the full expression. For MC/DC it is required, that each condition has to affect the outcome independently. With the above test (all are 0 or all are 1), we ignore the fact, that c-value doesn’t matter if a and b are 0, or, that b-value doesnt matter if a and c are 1.
To fulfil condition coverage, Boolean expression X, Y and Z will be evaluated in TRUE and FALSE form, at least once. Condition coverage is correlated to decision coverage as whenever any decision is to be taken, focus will be on number of possible multiple condition coverage conditions. As far as I know, condition coverage should check all conditions in an expression. This would seem to indicate that Multiple Condition Coverage, as the name suggests, only applies to conditionals with multiple statements.
To satisfy condition coverage, each Boolean expression X,Y and Z in above statement should be evaluated to TRUE and FALSE at least one time. In most cases, code coverage system gathers information about the running program. It also combines that with source code information to generate a report about the test suite’s code coverage. Fault injection may be necessary to ensure that all conditions and branches of exception-handling code have adequate coverage during testing.
- To satisfy condition coverage, each Boolean expression X,Y and Z in above statement should be evaluated to TRUE and FALSE at least one time.
- Software authors can look at test coverage results to devise additional tests and input or configuration sets to increase the coverage over vital functions.
- In MCDC each condition should be evaluated at least once which affects the decision outcome independently.
- 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.
- Condition Coverage or expression coverage is a testing method used to test and evaluate the variables or sub-expressions in the conditional statement.
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. For instance, path coverage implies decision, statement and entry/exit coverage.
It helps to measure fractions of independent code segments and to find out sections having no branches. 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.
The number of possible combinations can ‘explode’ in light of big numbers of conditions. To mitigate this problem the Modified Condition/Decision Coverage metric was created. In any decision, there are some possible number of conditions, which can be examined and evaluated by applying Boolean Expression as expressed above. The statements marked in yellow color are those which are executed as per the scenario. Statement coverage is used to derive scenario based upon the structure of the code under test. So you should sit down, use your brain, and think about for which combinations the overall result R is 1 or 0.