test/core/client_config/resolvers/dns_resolver_test.c

/*
 *
 * Copyright 2015, Google Inc.
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 * modification, are permitted provided that the following conditions are
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 *
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 * notice, this list of conditions and the following disclaimer.
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 * copyright notice, this list of conditions and the following disclaimer
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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#include "src/core/client_config/resolvers/dns_resolver.h"

#include <string.h>

#include <grpc/support/log.h>

#include "src/core/client_config/resolver.h"
#include "test/core/util/test_config.h"

static void subchannel_factory_ref(grpc_subchannel_factory *scv) {}
static void subchannel_factory_unref(grpc_exec_ctx *exec_ctx, 
                                     grpc_subchannel_factory *scv) {}
static grpc_subchannel *subchannel_factory_create_subchannel(grpc_exec_ctx *exec_ctx,
                                                             grpc_subchannel_factory *factory,
                                                             grpc_subchannel_args *args) {
  GPR_UNREACHABLE_CODE(return NULL);
}

static const grpc_subchannel_factory_vtable sc_vtable = {
  subchannel_factory_ref,
  subchannel_factory_unref,
  subchannel_factory_create_subchannel
};

static grpc_subchannel_factory sc_factory = { &sc_vtable };

static void test_succeeds(grpc_resolver_factory *factory, const char *string) {
  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
  grpc_uri *uri = grpc_uri_parse(string, 0);
  grpc_resolver_args args;
  grpc_resolver *resolver;
  gpr_log(GPR_DEBUG, "test: '%s' should be valid for '%s'", string, factory->vtable->scheme);
  GPR_ASSERT(uri);
  memset(&args, 0, sizeof(args));
  args.uri = uri;
  args.subchannel_factory = &sc_factory;
  resolver = grpc_resolver_factory_create_resolver(factory, &args);
  GPR_ASSERT(resolver != NULL);
  GRPC_RESOLVER_UNREF(&exec_ctx, resolver, "test_succeeds");
  grpc_uri_destroy(uri);
  grpc_exec_ctx_finish(&exec_ctx);
}

static void test_fails(grpc_resolver_factory *factory, const char *string) {
  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
  grpc_uri *uri = grpc_uri_parse(string, 0);
  grpc_resolver_args args;
  grpc_resolver *resolver;
  gpr_log(GPR_DEBUG, "test: '%s' should be invalid for '%s'", string, factory->vtable->scheme);
  GPR_ASSERT(uri);
  memset(&args, 0, sizeof(args));
  args.uri = uri;
  resolver = grpc_resolver_factory_create_resolver(factory, &args);
  GPR_ASSERT(resolver == NULL);
  grpc_uri_destroy(uri);
  grpc_exec_ctx_finish(&exec_ctx);
}

int main(int argc, char **argv) {
  grpc_resolver_factory *dns;
  grpc_test_init(argc, argv);

  dns = grpc_dns_resolver_factory_create();

  test_succeeds(dns, "dns:10.2.1.1");
  test_succeeds(dns, "dns:10.2.1.1:1234");
  test_succeeds(dns, "ipv4:www.google.com");
  test_fails(dns, "ipv4://8.8.8.8/8.8.8.8:8888");

  grpc_resolver_factory_unref(dns);

  return 0;
}