Page 59 - SOFTWARE TESTING & QUALITY ASSURANCE

Software Testing and Quality Assurance

The different types of code coverage testing is shown in figure 4.3

Figure 4.3: Code Coverage Types

Now, let us discuss the types of code coverage.

1. Statement Coverage: The simplest form of code coverage is known as statement coverage or line
coverage. A software tester needs to ensure that all the statements are executed at least once.

1: PRINT “Good Morning”

2: PRINT “Be Positive”
3: PRINT “Today is a Great Day”
4: END

Did you know? Data coverage method is considered to be more effective than the statement coverage
testing, as it uncovers more faults with fewer tests.

In the above mentioned program, all the statements are executed once. Sometimes statement
coverage can be misleading. This is due to the fact that statement coverage can provide
information relating to the execution of each statement only, and not relating to the paths
traversed in the software.
2. Path Coverage: Path coverage relates to covering all the paths in the software. The simplest form
of path testing is known as branch coverage testing.
Loops are the important parts of a structured program. The direction in which the control
proceeds in a program and the number of times the statement gets executed is based on the
initiation and termination condition of loops. Testing such types of loops is a challenging task, as
an error may be revealed only after exercising some of the sequence of decisions or particular
paths in a program.

An ‘If statement’ that creates a condition

1: PRINT “Good Morning”
2: IF Date$ = “25-12-2008” then
3: PRINT “MERRY CHRISTMAS”
4: END IF
5: PRINT “The date id:”; Date$

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