Testing Lab 1.doc

Software Testing Lab 1 White Box Testing // // Find the first instance in "string" of each character in "what" // Return the locations of the first instance of each what[i] in where[i] // ignoring the first "start" characters in string // Return TRUE if any character found // All strings are NULL-terminated // #include <string.h> #include "findx.h" int findx( char *string, int start, char *what, int where[] ) { int int int int int

i = 0; len = strlen(string); any = 0; found = 0; j;

/* index into what[] */ /* any character found = FALSE */ /* current character found = FALSE */ /* index into string[] */

char c=what[0]; while (c != '\000') { found = 0; /* FALSE */ j = start; do { if (string[j++] == c) { found = 1; /* TRUE */ any = 1; /* TRUE */ } } while ( (!found) && (j < len) ); if (found) where[i] = j-1; else where[i] = len; c=what[++i]; } return any; }

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Consider the program findx.cc on the previous page. Develop the following tests for this program 1. 2. 3. 4. 5. 6. 7.

Statement coverage Branch coverage D-D Path Testing Condition Coverage Testing Decision/Condition Coverage Testing Multiple Condition Coverage Testing Path Testing

Ensure that you document your tests as you develop them:  

Write down the test cases Write down the test data

CPPunit Example – Just for your own reference in the future The following example is of a simple program and CPPunit test suite to test that program. Type in the code and run it to observe how the tests are engineered. We will use the program findx.cc again, but it should be saved as a ‘.cpp’ file. The file findx.h contains int findx( char *string, int start, char *what, int *where );

The syntax for a CPPunit test is runtest <SUT> {<SUITE>}

where SUT is the nema of the software under test (including version number) and {<SUITE>} is the (optional) name of the test suite to run: the default being all tests. The name of this program is finderTest.cpp #include #include #include #include #include #include #include

<extensions/TestFactoryRegistry.h> <extensions/HelperMacros.h> <Exception.h>

using namespace CppUnit; #include "stdafx.h" #include

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#include #include #include #include

//

<stddef.h> <string.h> "findx.h"

first start a test suite that defines the methods to call

class finderTest : public CppUnit::TestFixture { CPPUNIT_TEST_SUITE( finderTest ); CPPUNIT_TEST( test1 ); CPPUNIT_TEST( test2 ); CPPUNIT_TEST_SUITE_END(); // end the test suite private: // put private attributes required for testing here public: // put your own test methods here - one per test case or test ID is usual // use CPPUNIT_ASSERT() to check results // Test1 – this test should be passed void test1() { int rv; int where[6]; rv = findx( "abccde", 0, "c", &where[0] ); CPPUNIT_ASSERT( rv == 1 ); // program resturns true CPPUNIT_ASSERT( where[0] == 2 ); //char c located at index 2 } // Test2

- this test should fail

void test2() { int rv; int where[6]; rv = findx( "abccde", 0, "x", &where[0] ); CPPUNIT_ASSERT( rv == 1 ); CPPUNIT_ASSERT( where[0] == 2 );

} }; // the following line adds this test suite to the test factory CPPUNIT_TEST_SUITE_REGISTRATION( finderTest ); // main program for CPPunit int main( int argc, char *argv[] ) { bool success;

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TextUi::TestRunner runner; TestFactoryRegistry ®istry = TestFactoryRegistry::getRegistry(); char *testname; char *sut; time_t now=time(0); // run all the tests if no params if (argc==1) { sut = "finder"; testname = "finderTest"; } // print the test info // default to all tests if none specified std::cout << "Test log at " << ctime(&now) << std::endl; std::cout << "Running cppunit tests for " << sut << std::endl; std::cout << "Test suite selected: " << testname << std::endl; // add all the unit tests from the registry to this runner runner.addTest( registry.makeTest() ); // and run the (selected) tests success = runner.run( testname ); // return 0 on success, and 1 on failure (for make) if (success) return 0; else return 1; }

Type in this code and run this example. Then, add some more suitable test cases, say 3 or 4 more, to augment the testing exercise.

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