lix/src/libutil/tests/config.cc

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2020-05-26 15:49:31 +00:00
#include "json.hh"
#include "config.hh"
#include "args.hh"
#include <sstream>
#include <gtest/gtest.h>
namespace nix {
/* ----------------------------------------------------------------------------
* Config
* --------------------------------------------------------------------------*/
TEST(Config, setUndefinedSetting) {
Config config;
ASSERT_EQ(config.set("undefined-key", "value"), false);
}
TEST(Config, setDefinedSetting) {
Config config;
std::string value;
Setting<std::string> foo{&config, value, "name-of-the-setting", "description"};
ASSERT_EQ(config.set("name-of-the-setting", "value"), true);
}
TEST(Config, getDefinedSetting) {
Config config;
std::string value;
std::map<std::string, Config::SettingInfo> settings;
Setting<std::string> foo{&config, value, "name-of-the-setting", "description"};
config.getSettings(settings, /* overridenOnly = */ false);
const auto iter = settings.find("name-of-the-setting");
ASSERT_NE(iter, settings.end());
ASSERT_EQ(iter->second.value, "");
ASSERT_EQ(iter->second.description, "description");
}
TEST(Config, getDefinedOverridenSettingNotSet) {
Config config;
std::string value;
std::map<std::string, Config::SettingInfo> settings;
Setting<std::string> foo{&config, value, "name-of-the-setting", "description"};
config.getSettings(settings, /* overridenOnly = */ true);
const auto e = settings.find("name-of-the-setting");
ASSERT_EQ(e, settings.end());
}
TEST(Config, getDefinedSettingSet1) {
Config config;
std::string value;
std::map<std::string, Config::SettingInfo> settings;
Setting<std::string> setting{&config, value, "name-of-the-setting", "description"};
setting.assign("value");
config.getSettings(settings, /* overridenOnly = */ false);
const auto iter = settings.find("name-of-the-setting");
ASSERT_NE(iter, settings.end());
ASSERT_EQ(iter->second.value, "value");
ASSERT_EQ(iter->second.description, "description");
}
TEST(Config, getDefinedSettingSet2) {
Config config;
std::map<std::string, Config::SettingInfo> settings;
Setting<std::string> setting{&config, "", "name-of-the-setting", "description"};
ASSERT_TRUE(config.set("name-of-the-setting", "value"));
config.getSettings(settings, /* overridenOnly = */ false);
const auto e = settings.find("name-of-the-setting");
ASSERT_NE(e, settings.end());
ASSERT_EQ(e->second.value, "value");
ASSERT_EQ(e->second.description, "description");
}
TEST(Config, addSetting) {
class TestSetting : public AbstractSetting {
public:
TestSetting() : AbstractSetting("test", "test", {}) {}
void set(const std::string & value) {}
std::string to_string() const { return {}; }
};
Config config;
TestSetting setting;
ASSERT_FALSE(config.set("test", "value"));
config.addSetting(&setting);
ASSERT_TRUE(config.set("test", "value"));
}
TEST(Config, withInitialValue) {
const StringMap initials = {
{ "key", "value" },
};
Config config(initials);
{
std::map<std::string, Config::SettingInfo> settings;
config.getSettings(settings, /* overridenOnly = */ false);
ASSERT_EQ(settings.find("key"), settings.end());
}
Setting<std::string> setting{&config, "default-value", "key", "description"};
{
std::map<std::string, Config::SettingInfo> settings;
config.getSettings(settings, /* overridenOnly = */ false);
ASSERT_EQ(settings["key"].value, "value");
}
}
TEST(Config, resetOverriden) {
Config config;
config.resetOverriden();
}
TEST(Config, resetOverridenWithSetting) {
Config config;
Setting<std::string> setting{&config, "", "name-of-the-setting", "description"};
{
std::map<std::string, Config::SettingInfo> settings;
setting.set("foo");
ASSERT_EQ(setting.get(), "foo");
config.getSettings(settings, /* overridenOnly = */ true);
ASSERT_TRUE(settings.empty());
}
{
std::map<std::string, Config::SettingInfo> settings;
setting.override("bar");
ASSERT_TRUE(setting.overriden);
ASSERT_EQ(setting.get(), "bar");
config.getSettings(settings, /* overridenOnly = */ true);
ASSERT_FALSE(settings.empty());
}
{
std::map<std::string, Config::SettingInfo> settings;
config.resetOverriden();
ASSERT_FALSE(setting.overriden);
config.getSettings(settings, /* overridenOnly = */ true);
ASSERT_TRUE(settings.empty());
}
}
TEST(Config, toJSONOnEmptyConfig) {
std::stringstream out;
{ // Scoped to force the destructor of JSONObject to write the final `}`
JSONObject obj(out);
Config config;
config.toJSON(obj);
}
ASSERT_EQ(out.str(), "{}");
}
TEST(Config, toJSONOnNonEmptyConfig) {
std::stringstream out;
{ // Scoped to force the destructor of JSONObject to write the final `}`
JSONObject obj(out);
Config config;
std::map<std::string, Config::SettingInfo> settings;
Setting<std::string> setting{&config, "", "name-of-the-setting", "description"};
setting.assign("value");
config.toJSON(obj);
}
ASSERT_EQ(out.str(), R"#({"name-of-the-setting":{"description":"description","value":"value"}})#");
}
TEST(Config, setSettingAlias) {
Config config;
Setting<std::string> setting{&config, "", "some-int", "best number", { "another-int" }};
ASSERT_TRUE(config.set("some-int", "1"));
ASSERT_EQ(setting.get(), "1");
ASSERT_TRUE(config.set("another-int", "2"));
ASSERT_EQ(setting.get(), "2");
ASSERT_TRUE(config.set("some-int", "3"));
ASSERT_EQ(setting.get(), "3");
}
/* FIXME: The reapplyUnknownSettings method doesn't seem to do anything
* useful (these days). Whenever we add a new setting to Config the
* unknown settings are always considered. In which case is this function
* actually useful? Is there some way to register a Setting without calling
* addSetting? */
TEST(Config, DISABLED_reapplyUnknownSettings) {
Config config;
ASSERT_FALSE(config.set("name-of-the-setting", "unknownvalue"));
Setting<std::string> setting{&config, "default", "name-of-the-setting", "description"};
ASSERT_EQ(setting.get(), "default");
config.reapplyUnknownSettings();
ASSERT_EQ(setting.get(), "unknownvalue");
}
TEST(Config, applyConfigEmpty) {
Config config;
std::map<std::string, Config::SettingInfo> settings;
config.applyConfig("");
config.getSettings(settings);
ASSERT_TRUE(settings.empty());
}
TEST(Config, applyConfigEmptyWithComment) {
Config config;
std::map<std::string, Config::SettingInfo> settings;
config.applyConfig("# just a comment");
config.getSettings(settings);
ASSERT_TRUE(settings.empty());
}
TEST(Config, applyConfigAssignment) {
Config config;
std::map<std::string, Config::SettingInfo> settings;
Setting<std::string> setting{&config, "", "name-of-the-setting", "description"};
config.applyConfig(
"name-of-the-setting = value-from-file #useful comment\n"
"# name-of-the-setting = foo\n"
);
config.getSettings(settings);
ASSERT_FALSE(settings.empty());
ASSERT_EQ(settings["name-of-the-setting"].value, "value-from-file");
}
TEST(Config, applyConfigWithReassignedSetting) {
Config config;
std::map<std::string, Config::SettingInfo> settings;
Setting<std::string> setting{&config, "", "name-of-the-setting", "description"};
config.applyConfig(
"name-of-the-setting = first-value\n"
"name-of-the-setting = second-value\n"
);
config.getSettings(settings);
ASSERT_FALSE(settings.empty());
ASSERT_EQ(settings["name-of-the-setting"].value, "second-value");
}
TEST(Config, applyConfigFailsOnMissingIncludes) {
Config config;
std::map<std::string, Config::SettingInfo> settings;
Setting<std::string> setting{&config, "", "name-of-the-setting", "description"};
ASSERT_THROW(config.applyConfig(
"name-of-the-setting = value-from-file\n"
"# name-of-the-setting = foo\n"
"include /nix/store/does/not/exist.nix"
), Error);
}
TEST(Config, applyConfigInvalidThrows) {
Config config;
ASSERT_THROW(config.applyConfig("value == key"), UsageError);
ASSERT_THROW(config.applyConfig("value "), UsageError);
}
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}