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Utf16FlyString more or less works exactly the same as FlyString. It will store the raw encoded data of the string instance. If the string is a short ASCII string, Utf16FlyString holds the ShortString bytes; else, Utf16FlyString holds a pointer to the Utf16StringData.
142 lines
4.2 KiB
C++
142 lines
4.2 KiB
C++
/*
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* Copyright (c) 2025, Tim Flynn <trflynn89@ladybird.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibTest/TestCase.h>
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#include <AK/Utf16FlyString.h>
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TEST_CASE(empty_string)
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{
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Utf16FlyString fly {};
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EXPECT(fly.is_empty());
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EXPECT_EQ(fly, ""sv);
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// Short strings do not get stored in the fly string table.
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EXPECT_EQ(Utf16FlyString::number_of_utf16_fly_strings(), 0u);
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}
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TEST_CASE(short_string)
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{
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Utf16FlyString fly1 { "foo"_utf16 };
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EXPECT_EQ(fly1, "foo"sv);
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Utf16FlyString fly2 { "foo"_utf16 };
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EXPECT_EQ(fly2, "foo"sv);
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Utf16FlyString fly3 { "bar"_utf16 };
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EXPECT_EQ(fly3, "bar"sv);
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EXPECT_EQ(fly1, fly2);
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EXPECT_NE(fly1, fly3);
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EXPECT_NE(fly2, fly3);
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EXPECT(fly1.to_utf16_string().has_short_ascii_storage());
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EXPECT(fly2.to_utf16_string().has_short_ascii_storage());
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EXPECT(fly3.to_utf16_string().has_short_ascii_storage());
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// Short strings do not get stored in the fly string table.
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EXPECT_EQ(Utf16FlyString::number_of_utf16_fly_strings(), 0u);
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}
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TEST_CASE(long_string)
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{
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Utf16FlyString fly1 { "thisisdefinitelymorethan7bytes"_utf16 };
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EXPECT_EQ(fly1, "thisisdefinitelymorethan7bytes"sv);
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EXPECT_EQ(Utf16FlyString::number_of_utf16_fly_strings(), 1u);
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Utf16FlyString fly2 { "thisisdefinitelymorethan7bytes"_utf16 };
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EXPECT_EQ(fly2, "thisisdefinitelymorethan7bytes"sv);
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EXPECT_EQ(Utf16FlyString::number_of_utf16_fly_strings(), 1u);
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Utf16FlyString fly3 { "thisisalsoforsuremorethan7bytes"_utf16 };
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EXPECT_EQ(fly3, "thisisalsoforsuremorethan7bytes"sv);
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EXPECT_EQ(Utf16FlyString::number_of_utf16_fly_strings(), 2u);
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EXPECT_EQ(fly1, fly2);
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EXPECT_NE(fly1, fly3);
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EXPECT_NE(fly2, fly3);
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EXPECT(fly1.to_utf16_string().has_long_ascii_storage());
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EXPECT(fly2.to_utf16_string().has_long_ascii_storage());
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EXPECT(fly3.to_utf16_string().has_long_ascii_storage());
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}
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TEST_CASE(user_defined_literal)
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{
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auto fly1 = "thisisdefinitelymorethan7bytes"_utf16_fly_string;
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EXPECT_EQ(fly1, "thisisdefinitelymorethan7bytes"sv);
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EXPECT_EQ(Utf16FlyString::number_of_utf16_fly_strings(), 1u);
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auto fly2 = "thisisdefinitelymorethan7bytes"_utf16_fly_string;
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EXPECT_EQ(fly2, "thisisdefinitelymorethan7bytes"sv);
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EXPECT_EQ(Utf16FlyString::number_of_utf16_fly_strings(), 1u);
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auto fly3 = u"thisisdefinitelymorethan7bytes"_utf16_fly_string;
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EXPECT_EQ(fly3, u"thisisdefinitelymorethan7bytes"sv);
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EXPECT_EQ(Utf16FlyString::number_of_utf16_fly_strings(), 1u);
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auto fly4 = "foo"_utf16_fly_string;
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EXPECT_EQ(fly4, "foo"sv);
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EXPECT_EQ(Utf16FlyString::number_of_utf16_fly_strings(), 1u);
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EXPECT_EQ(fly1, fly2);
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EXPECT_EQ(fly1, fly3);
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EXPECT_EQ(fly3, fly3);
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EXPECT_NE(fly1, fly4);
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EXPECT_NE(fly2, fly4);
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EXPECT_NE(fly3, fly4);
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}
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TEST_CASE(fly_string_keep_string_data_alive)
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{
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EXPECT_EQ(Utf16FlyString::number_of_utf16_fly_strings(), 0u);
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{
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Utf16FlyString fly {};
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{
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auto string = "thisisdefinitelymorethan7bytes"_utf16;
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fly = Utf16FlyString { string };
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EXPECT_EQ(Utf16FlyString::number_of_utf16_fly_strings(), 1u);
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}
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EXPECT_EQ(fly, "thisisdefinitelymorethan7bytes"sv);
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EXPECT_EQ(Utf16FlyString::number_of_utf16_fly_strings(), 1u);
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}
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EXPECT_EQ(Utf16FlyString::number_of_utf16_fly_strings(), 0u);
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}
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TEST_CASE(moved_fly_string_becomes_empty)
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{
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Utf16FlyString fly1 {};
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EXPECT(fly1.is_empty());
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Utf16FlyString fly2 { "thisisdefinitelymorethan7bytes"_utf16 };
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EXPECT_EQ(fly2, "thisisdefinitelymorethan7bytes"sv);
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EXPECT_EQ(Utf16FlyString::number_of_utf16_fly_strings(), 1u);
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fly1 = move(fly2);
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EXPECT(fly2.is_empty());
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EXPECT_EQ(fly1, "thisisdefinitelymorethan7bytes"sv);
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EXPECT_EQ(Utf16FlyString::number_of_utf16_fly_strings(), 1u);
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}
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TEST_CASE(is_one_of)
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{
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auto foo = Utf16FlyString::from_utf8("foo"sv);
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auto bar = Utf16FlyString::from_utf16(u"bar"sv);
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EXPECT(foo.is_one_of(foo));
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EXPECT(foo.is_one_of(foo, bar));
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EXPECT(foo.is_one_of(bar, foo));
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EXPECT(!foo.is_one_of(bar));
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EXPECT(!bar.is_one_of("foo"sv));
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EXPECT(bar.is_one_of("foo"sv, "bar"sv));
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EXPECT(bar.is_one_of("bar"sv, "foo"sv));
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EXPECT(bar.is_one_of("bar"sv));
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}
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