120-Bdd-ScenarioGivenWhenThen.cpp File Reference

#include <catch2/catch.hpp>

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Functions
	SCENARIO ("vectors can be sized and resized", "[vector]")

Function Documentation

SCENARIO()

SCENARIO	(	"vectors can be sized and resized"	,
		""	[vector] )

Definition at line 7 of file 120-Bdd-ScenarioGivenWhenThen.cpp.

                                                           {
 
    GIVEN( "A vector with some items" ) {
        std::vector<int> v( 5 );
 
        REQUIRE( v.size() == 5 );
        REQUIRE( v.capacity() >= 5 );
 
        WHEN( "the size is increased" ) {
            v.resize( 10 );
 
            THEN( "the size and capacity change" ) {
                REQUIRE( v.size() == 10 );
                REQUIRE( v.capacity() >= 10 );
            }
        }
        WHEN( "the size is reduced" ) {
            v.resize( 0 );
 
            THEN( "the size changes but not capacity" ) {
                REQUIRE( v.size() == 0 );
                REQUIRE( v.capacity() >= 5 );
            }
        }
        WHEN( "more capacity is reserved" ) {
            v.reserve( 10 );
 
            THEN( "the capacity changes but not the size" ) {
                REQUIRE( v.size() == 5 );
                REQUIRE( v.capacity() >= 10 );
            }
        }
        WHEN( "less capacity is reserved" ) {
            v.reserve( 0 );
 
            THEN( "neither size nor capacity are changed" ) {
                REQUIRE( v.size() == 5 );
                REQUIRE( v.capacity() >= 5 );
            }
        }
    }
}