CATCH - Small complete multi-file example.

catch-main.cpp

// This tells Catch to provide a main() - only do this in one cpp file:
#define CATCH_CONFIG_MAIN  
#include "catch.hpp"

catch-unit-1.cpp

#include "catch.hpp"

TEST_CASE( "Passing case", "[pass]" ) {
    REQUIRE( 1 < 2 );
}

TEST_CASE( "Failing case", "[fail]" ) {
    REQUIRE( 1 == 2 );
}

mk.bat

rem compile main once:
g++ -c main.cpp

rem subsequently use main's object file:
g++ -o test.exe main.o unit-1.cpp && test

output.txt

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
test is a Catch v1.1 b3 host application.
Run with -? for options

-------------------------------------------------------------------------------
Failing case
-------------------------------------------------------------------------------
unit-1.cpp:7
...............................................................................

unit-1.cpp:8: FAILED:
  REQUIRE( 1 == 2 )

===============================================================================
test cases: 2 | 1 passed | 1 failed
assertions: 2 | 1 passed | 1 failed