examples/multi_file_example/main.cpp

#define DOCTEST_CONFIG_IMPLEMENT
#include "doctest.h"

int main(int argc, char** argv) {
    doctest::Context context; // initialize

    // defaults
    context.addFilter("test-case-exclude", "*math*"); // exclude test cases with "math" in their name
    context.setOption("no-breaks", true);             // don't break in the debugger when assertions fail

    context.applyCommandLine(argc, argv);

    // overrides
    context.setOption("abort-after", 5); // stop test execution after 5 failed assertions 
    context.setOption("sort", "name");   // sort the test cases by their name

    int res = context.run(); // run

    if(context.shouldExit()) // important - query flags (and --exit) rely on the user doing this
        return res;          // propagate the result of the tests

    int client_stuff_return_code = 0;
    // your program - if the testing framework is integrated in your production code

    return res + client_stuff_return_code; // the result from doctest is propagated here as well
}