Remove dns unit tests, because they are not *unit* test (depends on network…)

tests/dns.cpp

@@ -1,91 +0,0 @@
-#include "catch.hpp"
-
-#include <network/dns_handler.hpp>
-#include <network/resolver.hpp>
-#include <network/poller.hpp>
-
-#include <utils/timed_events.hpp>
-
-TEST_CASE("DNS resolver")
-{
-    Resolver resolver;
-    Resolver resolver2;
-    Resolver resolver3;
-
-    /**
-     * If we are using cares, we need to run a poller loop until each
-     * resolution is finished. Without cares we get the result before
-     * resolve() returns because it’s blocking.
-     */
-#ifdef CARES_FOUND
-    auto p = std::make_shared<Poller>();
-
-    const auto loop = [&p]()
-      {
-        do
-          {
-            DNSHandler::instance.watch_dns_sockets(p);
-          }
-        while (p->poll(utils::no_timeout) != -1);
-      };
-#else
-    // We don’t need to do anything if we are not using cares.
-    const auto loop = [](){};
-#endif
-
-    std::string hostname;
-    std::string port = "6667";
-
-    bool success = true;
-
-    const auto error_cb = [&success](const std::string& hostname)
-    {
-        return [&success, hostname](const char *msg)
-        {
-            INFO("Failed to resolve " << hostname << ":" << msg);
-            success = false;
-        };
-    };
-    const auto success_cb = [&success](const std::string& hostname)
-    {
-        return [&success, hostname](const struct addrinfo *addr)
-        {
-            INFO("Successfully resolved " << hostname << ": " << addr_to_string(addr));
-            success = true;
-        };
-    };
-
-    hostname = "example.com";
-    resolver.resolve(hostname, port,
-                     success_cb(hostname), error_cb(hostname));
-    hostname = "poez.io";
-    resolver2.resolve(hostname, port,
-                      success_cb(hostname), error_cb(hostname));
-    hostname = "louiz.org";
-    resolver3.resolve(hostname, port,
-                      success_cb(hostname), error_cb(hostname));
-    loop();
-    CHECK(success);
-
-    hostname = "this.should.fail.because.it.is..misformatted";
-    resolver.resolve(hostname, port,
-        success_cb(hostname), error_cb(hostname));
-    loop();
-    CHECK(!success);
-
-    hostname = "this.should.fail.because.it.is.does.not.exist.invalid";
-    resolver.resolve(hostname, port,
-        success_cb(hostname), error_cb(hostname));
-    loop();
-    CHECK(!success);
-
-    hostname = "localhost";
-    resolver.resolve(hostname, port,
-        success_cb(hostname), error_cb(hostname));
-    loop();
-    CHECK(success);
-
-#ifdef CARES_FOUND
-    DNSHandler::instance.destroy();
-#endif
-}