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// sol2
// The MIT License (MIT)
// Copyright (c) 2013-2022 Rapptz, ThePhD and contributors
// Permission is hereby granted, free of charge, to any person obtaining a copy of
// this software and associated documentation files (the "Software"), to deal in
// the Software without restriction, including without limitation the rights to
// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
// the Software, and to permit persons to whom the Software is furnished to do so,
// subject to the following conditions:
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
#include <catch2/catch_all.hpp>
#include <sol/sol.hpp>
TEST_CASE("environments/shadowing", "Environments can properly shadow and fallback on variables") {
sol::state lua;
sol::stack_guard luasg(lua);
lua["b"] = 2142;
SECTION("no fallback") {
sol::environment plain_env(lua, sol::create);
auto result1 = lua.safe_script("a = 24", plain_env, sol::script_pass_on_error);
REQUIRE(result1.valid());
REQUIRE(result1.status() == sol::call_status::ok);
sol::optional<int> maybe_env_a = plain_env["a"];
sol::optional<int> maybe_global_a = lua["a"];
sol::optional<int> maybe_env_b = plain_env["b"];
sol::optional<int> maybe_global_b = lua["b"];
REQUIRE(maybe_env_a != sol::nullopt);
REQUIRE(maybe_env_a.value() == 24);
REQUIRE(maybe_env_b == sol::nullopt);
REQUIRE(maybe_global_a == sol::nullopt);
REQUIRE(maybe_global_b != sol::nullopt);
REQUIRE(maybe_global_b.value() == 2142);
}
SECTION("fallback") {
sol::environment env_with_fallback(lua, sol::create, lua.globals());
auto result1 = lua.safe_script("a = 56", env_with_fallback, sol::script_pass_on_error);
REQUIRE(result1.valid());
REQUIRE(result1.status() == sol::call_status::ok);
sol::optional<int> maybe_env_a = env_with_fallback["a"];
sol::optional<int> maybe_global_a = lua["a"];
sol::optional<int> maybe_env_b = env_with_fallback["b"];
sol::optional<int> maybe_global_b = lua["b"];
REQUIRE(maybe_env_a != sol::nullopt);
REQUIRE(maybe_env_a.value() == 56);
REQUIRE(maybe_env_b != sol::nullopt);
REQUIRE(maybe_env_b.value() == 2142);
REQUIRE(maybe_global_a == sol::nullopt);
REQUIRE(maybe_global_b != sol::nullopt);
REQUIRE(maybe_global_b.value() == 2142);
}
SECTION("from name") {
sol::environment env_with_fallback(lua, sol::create, lua.globals());
lua["env"] = env_with_fallback;
sol::environment env = lua["env"];
auto result1 = lua.safe_script("a = 56", env, sol::script_pass_on_error);
REQUIRE(result1.valid());
sol::optional<int> maybe_env_a = env["a"];
sol::optional<int> maybe_global_a = lua["a"];
sol::optional<int> maybe_env_b = env["b"];
sol::optional<int> maybe_global_b = lua["b"];
REQUIRE(maybe_env_a != sol::nullopt);
REQUIRE(maybe_env_a.value() == 56);
REQUIRE(maybe_env_b != sol::nullopt);
REQUIRE(maybe_env_b.value() == 2142);
REQUIRE(maybe_global_a == sol::nullopt);
REQUIRE(maybe_global_b != sol::nullopt);
REQUIRE(maybe_global_b.value() == 2142);
}
SECTION("name with newtable") {
lua["blank_env"] = sol::new_table(0, 1);
sol::environment plain_env = lua["blank_env"];
auto result1 = lua.safe_script("a = 24", plain_env, sol::script_pass_on_error);
REQUIRE(result1.valid());
sol::optional<int> maybe_env_a = plain_env["a"];
sol::optional<int> maybe_global_a = lua["a"];
sol::optional<int> maybe_env_b = plain_env["b"];
sol::optional<int> maybe_global_b = lua["b"];
REQUIRE(maybe_env_a != sol::nullopt);
REQUIRE(maybe_env_a.value() == 24);
REQUIRE(maybe_env_b == sol::nullopt);
REQUIRE(maybe_global_a == sol::nullopt);
REQUIRE(maybe_global_b != sol::nullopt);
REQUIRE(maybe_global_b.value() == 2142);
}
}
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