port_searcher.h

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#pragma once
 
#include <memory>
#include <stdexcept>
 
namespace httpmock {
 
 
template <typename HTTPMock>
std::unique_ptr<MockServer> getFirstRunningMockServer(
        unsigned port = 8080, unsigned tryCount = 1000)
{
    for (unsigned p = 0; p < tryCount; p++) {
        try {
            std::unique_ptr<MockServer> server(new HTTPMock(port + p));
            // try to run the server on current port
            server->start();
            return server;
        } catch (const std::runtime_error &) {
            // error occured, try next port number
            continue;
        }
    }
    throw std::runtime_error("MockServer did not come up!");
}
 
 
}