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gtest_settings.cpp
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#include <gtest/gtest.h>
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#include <Core/SettingsFields.h>
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#include <Core/SettingsEnums.h>
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#include <Core/Field.h>
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namespace
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{
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using namespace DB;
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using SettingMySQLDataTypesSupport = SettingFieldMultiEnum<MySQLDataTypesSupport, SettingFieldMySQLDataTypesSupportTraits>;
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}
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namespace DB
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{
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template <typename Enum, typename Traits>
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bool operator== (const SettingFieldMultiEnum<Enum, Traits> & setting, const Field & f)
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{
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    return Field(setting) == f;
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}
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template <typename Enum, typename Traits>
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bool operator== (const Field & f, const SettingFieldMultiEnum<Enum, Traits> & setting)
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{
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    return f == Field(setting);
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}
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}
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GTEST_TEST(SettingMySQLDataTypesSupport, WithDefault)
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{
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    // Setting can be default-initialized and that means all values are unset.
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    const SettingMySQLDataTypesSupport setting;
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    ASSERT_EQ(std::vector<MySQLDataTypesSupport>{}, setting.value);
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    ASSERT_EQ("", setting.toString());
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    ASSERT_EQ(setting, Field(""));
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    ASSERT_FALSE(MultiEnum<MySQLDataTypesSupport>(setting).isSet(MySQLDataTypesSupport::DECIMAL));
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    ASSERT_FALSE(MultiEnum<MySQLDataTypesSupport>(setting).isSet(MySQLDataTypesSupport::DATETIME64));
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}
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GTEST_TEST(SettingMySQLDataTypesSupport, WithDECIMAL)
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{
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    // Setting can be initialized with MySQLDataTypesSupport::DECIMAL
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    // and this value can be obtained in varios forms with getters.
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    const SettingMySQLDataTypesSupport setting(MySQLDataTypesSupport::DECIMAL);
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    ASSERT_EQ(std::vector<MySQLDataTypesSupport>{MySQLDataTypesSupport::DECIMAL}, setting.value);
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    ASSERT_TRUE(MultiEnum<MySQLDataTypesSupport>(setting).isSet(MySQLDataTypesSupport::DECIMAL));
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    ASSERT_FALSE(MultiEnum<MySQLDataTypesSupport>(setting).isSet(MySQLDataTypesSupport::DATETIME64));
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    ASSERT_EQ("decimal", setting.toString());
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    ASSERT_EQ(Field("decimal"), setting);
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}
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GTEST_TEST(SettingMySQLDataTypesSupport, WithDATE)
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{
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    SettingMySQLDataTypesSupport setting;
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    setting = String("date2Date32");
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    ASSERT_EQ(std::vector<MySQLDataTypesSupport>{MySQLDataTypesSupport::DATE2DATE32}, setting.value);
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    ASSERT_TRUE(MultiEnum<MySQLDataTypesSupport>(setting).isSet(MySQLDataTypesSupport::DATE2DATE32));
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    ASSERT_FALSE(MultiEnum<MySQLDataTypesSupport>(setting).isSet(MySQLDataTypesSupport::DECIMAL));
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    ASSERT_FALSE(MultiEnum<MySQLDataTypesSupport>(setting).isSet(MySQLDataTypesSupport::DATETIME64));
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    ASSERT_EQ("date2Date32", setting.toString());
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    ASSERT_EQ(Field("date2Date32"), setting);
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    setting = String("date2String");
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    ASSERT_EQ(std::vector<MySQLDataTypesSupport>{MySQLDataTypesSupport::DATE2STRING}, setting.value);
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    ASSERT_TRUE(MultiEnum<MySQLDataTypesSupport>(setting).isSet(MySQLDataTypesSupport::DATE2STRING));
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    ASSERT_FALSE(MultiEnum<MySQLDataTypesSupport>(setting).isSet(MySQLDataTypesSupport::DATE2DATE32));
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    ASSERT_EQ("date2String", setting.toString());
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    ASSERT_EQ(Field("date2String"), setting);
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}
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GTEST_TEST(SettingMySQLDataTypesSupport, SetString)
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{
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    SettingMySQLDataTypesSupport setting;
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    setting = String("decimal");
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    ASSERT_TRUE(setting.changed);
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    ASSERT_TRUE(MultiEnum<MySQLDataTypesSupport>(setting).isSet(MySQLDataTypesSupport::DECIMAL));
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    ASSERT_FALSE(MultiEnum<MySQLDataTypesSupport>(setting).isSet(MySQLDataTypesSupport::DATETIME64));
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    ASSERT_EQ("decimal", setting.toString());
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    ASSERT_EQ(Field("decimal"), setting);
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    setting = "datetime64,decimal";
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    ASSERT_TRUE(setting.changed);
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    ASSERT_TRUE(MultiEnum<MySQLDataTypesSupport>(setting).isSet(MySQLDataTypesSupport::DECIMAL));
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    ASSERT_TRUE(MultiEnum<MySQLDataTypesSupport>(setting).isSet(MySQLDataTypesSupport::DATETIME64));
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    ASSERT_EQ("datetime64,decimal", setting.toString());
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    ASSERT_EQ(Field("datetime64,decimal"), setting);
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    // comma with spaces
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    setting = " datetime64 ,    decimal "; /// bad punctuation is ok here
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    ASSERT_TRUE(setting.changed);
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    ASSERT_TRUE(MultiEnum<MySQLDataTypesSupport>(setting).isSet(MySQLDataTypesSupport::DECIMAL));
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    ASSERT_TRUE(MultiEnum<MySQLDataTypesSupport>(setting).isSet(MySQLDataTypesSupport::DATETIME64));
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    ASSERT_EQ("datetime64,decimal", setting.toString());
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    ASSERT_EQ(Field("datetime64,decimal"), setting);
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    setting = String(",,,,,,,, ,decimal");
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    ASSERT_TRUE(setting.changed);
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    ASSERT_TRUE(MultiEnum<MySQLDataTypesSupport>(setting).isSet(MySQLDataTypesSupport::DECIMAL));
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    ASSERT_FALSE(MultiEnum<MySQLDataTypesSupport>(setting).isSet(MySQLDataTypesSupport::DATETIME64));
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    ASSERT_EQ("decimal", setting.toString());
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    ASSERT_EQ(Field("decimal"), setting);
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    setting = String(",decimal,decimal,decimal,decimal,decimal,decimal,decimal,decimal,decimal,");
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    ASSERT_TRUE(setting.changed); //since previous value was DECIMAL
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    ASSERT_TRUE(MultiEnum<MySQLDataTypesSupport>(setting).isSet(MySQLDataTypesSupport::DECIMAL));
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    ASSERT_FALSE(MultiEnum<MySQLDataTypesSupport>(setting).isSet(MySQLDataTypesSupport::DATETIME64));
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    ASSERT_EQ("decimal", setting.toString());
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    ASSERT_EQ(Field("decimal"), setting);
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    setting = String("");
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    ASSERT_TRUE(setting.changed);
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    ASSERT_FALSE(MultiEnum<MySQLDataTypesSupport>(setting).isSet(MySQLDataTypesSupport::DECIMAL));
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    ASSERT_FALSE(MultiEnum<MySQLDataTypesSupport>(setting).isSet(MySQLDataTypesSupport::DATETIME64));
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    ASSERT_EQ("", setting.toString());
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    ASSERT_EQ(Field(""), setting);
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}
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GTEST_TEST(SettingMySQLDataTypesSupport, SetInvalidString)
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{
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    // Setting can be initialized with int value corresponding to (DECIMAL | DATETIME64)
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    SettingMySQLDataTypesSupport setting;
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    EXPECT_THROW(setting = String("FOOBAR"), Exception);
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    ASSERT_FALSE(setting.changed);
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    ASSERT_EQ(std::vector<MySQLDataTypesSupport>{}, setting.value);
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    EXPECT_THROW(setting = String("decimal,datetime64,123"), Exception);
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    ASSERT_FALSE(setting.changed);
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    ASSERT_EQ(std::vector<MySQLDataTypesSupport>{}, setting.value);
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    EXPECT_NO_THROW(setting = String(", "));
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    ASSERT_TRUE(setting.changed);
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    ASSERT_EQ(std::vector<MySQLDataTypesSupport>{}, setting.value);
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}
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