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serenity/Tests/AK/TestFlyString.cpp
Andreas Kling 25eee91811 AK: Make "foo"_fly_string infallible
Stop worrying about tiny OOMs.

Work towards #20405.
2023-08-07 16:03:27 +02:00

137 lines
3.7 KiB
C++

/*
* Copyright (c) 2023, Tim Flynn <trflynn89@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibTest/TestCase.h>
#include <AK/FlyString.h>
#include <AK/String.h>
#include <AK/Try.h>
TEST_CASE(empty_string)
{
FlyString fly {};
EXPECT(fly.is_empty());
EXPECT_EQ(fly, ""sv);
// Short strings do not get stored in the fly string table.
EXPECT_EQ(FlyString::number_of_fly_strings(), 0u);
}
TEST_CASE(short_string)
{
FlyString fly1 { "foo"_string };
EXPECT_EQ(fly1, "foo"sv);
FlyString fly2 { "foo"_string };
EXPECT_EQ(fly2, "foo"sv);
FlyString fly3 { "bar"_string };
EXPECT_EQ(fly3, "bar"sv);
EXPECT_EQ(fly1, fly2);
EXPECT_NE(fly1, fly3);
EXPECT_NE(fly2, fly3);
EXPECT(fly1.to_string().is_short_string());
EXPECT(fly2.to_string().is_short_string());
EXPECT(fly3.to_string().is_short_string());
// Short strings do not get stored in the fly string table.
EXPECT_EQ(FlyString::number_of_fly_strings(), 0u);
}
TEST_CASE(long_string)
{
FlyString fly1 { "thisisdefinitelymorethan7bytes"_string };
EXPECT_EQ(fly1, "thisisdefinitelymorethan7bytes"sv);
EXPECT_EQ(FlyString::number_of_fly_strings(), 1u);
FlyString fly2 { "thisisdefinitelymorethan7bytes"_string };
EXPECT_EQ(fly2, "thisisdefinitelymorethan7bytes"sv);
EXPECT_EQ(FlyString::number_of_fly_strings(), 1u);
FlyString fly3 { "thisisalsoforsuremorethan7bytes"_string };
EXPECT_EQ(fly3, "thisisalsoforsuremorethan7bytes"sv);
EXPECT_EQ(FlyString::number_of_fly_strings(), 2u);
EXPECT_EQ(fly1, fly2);
EXPECT_NE(fly1, fly3);
EXPECT_NE(fly2, fly3);
EXPECT(!fly1.to_string().is_short_string());
EXPECT(!fly2.to_string().is_short_string());
EXPECT(!fly3.to_string().is_short_string());
}
TEST_CASE(from_string_view)
{
auto fly1 = "thisisdefinitelymorethan7bytes"_fly_string;
EXPECT_EQ(fly1, "thisisdefinitelymorethan7bytes"sv);
EXPECT_EQ(FlyString::number_of_fly_strings(), 1u);
auto fly2 = "thisisdefinitelymorethan7bytes"_fly_string;
EXPECT_EQ(fly2, "thisisdefinitelymorethan7bytes"sv);
EXPECT_EQ(FlyString::number_of_fly_strings(), 1u);
auto fly3 = "foo"_fly_string;
EXPECT_EQ(fly3, "foo"sv);
EXPECT_EQ(FlyString::number_of_fly_strings(), 1u);
EXPECT_EQ(fly1, fly2);
EXPECT_NE(fly1, fly3);
EXPECT_NE(fly2, fly3);
}
TEST_CASE(fly_string_keep_string_data_alive)
{
EXPECT_EQ(FlyString::number_of_fly_strings(), 0u);
{
FlyString fly {};
{
auto string = "thisisdefinitelymorethan7bytes"_string;
fly = FlyString { string };
EXPECT_EQ(FlyString::number_of_fly_strings(), 1u);
}
EXPECT_EQ(fly, "thisisdefinitelymorethan7bytes"sv);
EXPECT_EQ(FlyString::number_of_fly_strings(), 1u);
}
EXPECT_EQ(FlyString::number_of_fly_strings(), 0u);
}
TEST_CASE(moved_fly_string_becomes_empty)
{
FlyString fly1 {};
EXPECT(fly1.is_empty());
FlyString fly2 { "thisisdefinitelymorethan7bytes"_string };
EXPECT_EQ(fly2, "thisisdefinitelymorethan7bytes"sv);
EXPECT_EQ(FlyString::number_of_fly_strings(), 1u);
fly1 = move(fly2);
EXPECT(fly2.is_empty());
EXPECT_EQ(fly1, "thisisdefinitelymorethan7bytes"sv);
EXPECT_EQ(FlyString::number_of_fly_strings(), 1u);
}
TEST_CASE(is_one_of)
{
auto foo = MUST(FlyString::from_utf8("foo"sv));
auto bar = MUST(FlyString::from_utf8("bar"sv));
EXPECT(foo.is_one_of(foo));
EXPECT(foo.is_one_of(foo, bar));
EXPECT(foo.is_one_of(bar, foo));
EXPECT(!foo.is_one_of(bar));
EXPECT(!bar.is_one_of("foo"sv));
EXPECT(bar.is_one_of("foo"sv, "bar"sv));
EXPECT(bar.is_one_of("bar"sv, "foo"sv));
EXPECT(bar.is_one_of("bar"sv));
}