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diff --git a/paludis/repositories/e/e_repository_TEST_5.cc b/paludis/repositories/e/e_repository_TEST_5.cc
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+/* vim: set sw=4 sts=4 et foldmethod=syntax : */
+
+/*
+ * Copyright (c) 2006, 2007, 2008, 2009, 2010, 2011 Ciaran McCreesh
+ *
+ * This file is part of the Paludis package manager. Paludis is free software;
+ * you can redistribute it and/or modify it under the terms of the GNU General
+ * Public License version 2, as published by the Free Software Foundation.
+ *
+ * Paludis is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+ * Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <paludis/repositories/e/e_repository.hh>
+#include <paludis/repositories/e/e_repository_exceptions.hh>
+#include <paludis/repositories/e/e_repository_id.hh>
+#include <paludis/repositories/e/vdb_repository.hh>
+#include <paludis/repositories/e/eapi.hh>
+#include <paludis/repositories/e/spec_tree_pretty_printer.hh>
+
+#include <paludis/repositories/fake/fake_installed_repository.hh>
+#include <paludis/repositories/fake/fake_package_id.hh>
+
+#include <paludis/environments/test/test_environment.hh>
+
+#include <paludis/util/system.hh>
+#include <paludis/util/visitor_cast.hh>
+#include <paludis/util/map.hh>
+#include <paludis/util/make_named_values.hh>
+#include <paludis/util/set.hh>
+#include <paludis/util/make_null_shared_ptr.hh>
+#include <paludis/util/safe_ifstream.hh>
+#include <paludis/util/stringify.hh>
+
+#include <paludis/standard_output_manager.hh>
+#include <paludis/package_id.hh>
+#include <paludis/metadata_key.hh>
+#include <paludis/action.hh>
+#include <paludis/user_dep_spec.hh>
+#include <paludis/generator.hh>
+#include <paludis/filter.hh>
+#include <paludis/filtered_generator.hh>
+#include <paludis/selection.hh>
+#include <paludis/repository_factory.hh>
+#include <paludis/choice.hh>
+
+#include <functional>
+#include <set>
+#include <string>
+
+#include "config.h"
+
+#include <gtest/gtest.h>
+
+using namespace paludis;
+
+namespace
+{
+ void cannot_uninstall(const std::shared_ptr<const PackageID> & id, const UninstallActionOptions &)
+ {
+ if (id)
+ throw InternalError(PALUDIS_HERE, "cannot uninstall");
+ }
+
+ std::shared_ptr<OutputManager> make_standard_output_manager(const Action &)
+ {
+ return std::make_shared<StandardOutputManager>();
+ }
+
+ std::string from_keys(const std::shared_ptr<const Map<std::string, std::string> > & m,
+ const std::string & k)
+ {
+ Map<std::string, std::string>::ConstIterator mm(m->find(k));
+ if (m->end() == mm)
+ return "";
+ else
+ return mm->second;
+ }
+
+ WantPhase want_all_phases(const std::string &)
+ {
+ return wp_yes;
+ }
+}
+
+TEST(ERepository, RequiredUse)
+{
+ FSPath root(FSPath::cwd() / "e_repository_TEST_5_dir" / "root");
+
+ TestEnvironment env;
+ std::shared_ptr<Map<std::string, std::string> > keys(std::make_shared<Map<std::string, std::string>>());
+ keys->insert("format", "e");
+ keys->insert("names_cache", "/var/empty");
+ keys->insert("location", stringify(FSPath::cwd() / "e_repository_TEST_5_dir" / "repo"));
+ keys->insert("profiles", stringify(FSPath::cwd() / "e_repository_TEST_5_dir" / "repo/profiles/profile"));
+ keys->insert("layout", "traditional");
+ keys->insert("eapi_when_unknown", "0");
+ keys->insert("eapi_when_unspecified", "0");
+ keys->insert("profile_eapi", "0");
+ keys->insert("distdir", stringify(FSPath::cwd() / "e_repository_TEST_5_dir" / "distdir"));
+ keys->insert("builddir", stringify(FSPath::cwd() / "e_repository_TEST_5_dir" / "build"));
+ std::shared_ptr<Repository> repo(ERepository::repository_factory_create(&env,
+ std::bind(from_keys, keys, std::placeholders::_1)));
+ env.add_repository(1, repo);
+
+ std::shared_ptr<FakeInstalledRepository> installed_repo(std::make_shared<FakeInstalledRepository>(
+ make_named_values<FakeInstalledRepositoryParams>(
+ n::environment() = &env,
+ n::name() = RepositoryName("installed"),
+ n::suitable_destination() = true,
+ n::supports_uninstall() = true
+ )));
+ env.add_repository(2, installed_repo);
+
+ {
+ PretendAction pretend_action(make_named_values<PretendActionOptions>(
+ n::destination() = installed_repo,
+ n::make_output_manager() = &make_standard_output_manager,
+ n::replacing() = std::make_shared<PackageIDSequence>()
+ ));
+
+ const std::shared_ptr<const PackageID> id(*env[selection::RequireExactlyOne(generator::Matches(
+ PackageDepSpec(parse_user_package_dep_spec("=cat/required-use-at-most-one-none-5::test-repo",
+ &env, { })), make_null_shared_ptr(), { }))]->last());
+ ASSERT_TRUE(bool(id));
+ EXPECT_EQ("5", visitor_cast<const MetadataValueKey<std::string> >(**id->find_metadata("EAPI"))->parse_value());
+ id->perform_action(pretend_action);
+ ASSERT_TRUE(! pretend_action.failed());
+ }
+
+ {
+ PretendAction pretend_action(make_named_values<PretendActionOptions>(
+ n::destination() = installed_repo,
+ n::make_output_manager() = &make_standard_output_manager,
+ n::replacing() = std::make_shared<PackageIDSequence>()
+ ));
+
+ const std::shared_ptr<const PackageID> id(*env[selection::RequireExactlyOne(generator::Matches(
+ PackageDepSpec(parse_user_package_dep_spec("=cat/required-use-at-most-one-one-5::test-repo",
+ &env, { })), make_null_shared_ptr(), { }))]->last());
+ ASSERT_TRUE(bool(id));
+ EXPECT_EQ("5", visitor_cast<const MetadataValueKey<std::string> >(**id->find_metadata("EAPI"))->parse_value());
+ id->perform_action(pretend_action);
+ ASSERT_TRUE(! pretend_action.failed());
+ }
+
+ {
+ PretendAction pretend_action(make_named_values<PretendActionOptions>(
+ n::destination() = installed_repo,
+ n::make_output_manager() = &make_standard_output_manager,
+ n::replacing() = std::make_shared<PackageIDSequence>()
+ ));
+
+ const std::shared_ptr<const PackageID> id(*env[selection::RequireExactlyOne(generator::Matches(
+ PackageDepSpec(parse_user_package_dep_spec("=cat/required-use-at-most-one-two-5::test-repo",
+ &env, { })), make_null_shared_ptr(), { }))]->last());
+ ASSERT_TRUE(bool(id));
+ EXPECT_EQ("5", visitor_cast<const MetadataValueKey<std::string> >(**id->find_metadata("EAPI"))->parse_value());
+ id->perform_action(pretend_action);
+ ASSERT_TRUE(pretend_action.failed());
+ }
+}
+