117 lines
2.2 KiB
C++
117 lines
2.2 KiB
C++
// SPDX-License-Identifier: BSD-2-Clause
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// author: Max Kellermann <max.kellermann@gmail.com>
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#include "util/RingBuffer.hxx"
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#include "util/SpanCast.hxx"
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#include <gtest/gtest.h>
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using std::string_view_literals::operator""sv;
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TEST(RingBuffer, DirectReadWrite)
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{
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RingBuffer<char> b{3};
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EXPECT_EQ(b.WriteAvailable(), 3U);
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EXPECT_EQ(b.ReadAvailable(), 0U);
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EXPECT_EQ(ToStringView(b.Read()), ""sv);
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auto w = b.Write();
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EXPECT_EQ(w.size(), 3U);
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w[0] = 'a';
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w[1] = 'b';
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b.Append(2);
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// "ab__"
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EXPECT_EQ(b.WriteAvailable(), 1U);
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EXPECT_EQ(b.Read().size(), 2U);
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EXPECT_EQ(b.ReadAvailable(), 2U);
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EXPECT_EQ(ToStringView(b.Read()), "ab"sv);
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b.Consume(1);
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// "_b__"
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EXPECT_EQ(b.WriteAvailable(), 2U);
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EXPECT_EQ(b.ReadAvailable(), 1U);
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EXPECT_EQ(ToStringView(b.Read()), "b"sv);
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w = b.Write();
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EXPECT_EQ(w.size(), 2U);
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w[0] = 'c';
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w[1] = 'd';
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b.Append(2);
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// "_bcd"
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EXPECT_EQ(b.WriteAvailable(), 0U);
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EXPECT_EQ(b.ReadAvailable(), 3U);
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EXPECT_EQ(ToStringView(b.Read()), "bcd"sv);
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b.Consume(1);
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// "__cd"
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EXPECT_EQ(b.WriteAvailable(), 1U);
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EXPECT_EQ(b.ReadAvailable(), 2U);
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EXPECT_EQ(ToStringView(b.Read()), "cd"sv);
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w = b.Write();
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EXPECT_EQ(w.size(), 1U);
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w[0] = 'e';
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b.Append(1);
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// "e_cd"
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EXPECT_EQ(b.WriteAvailable(), 0U);
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EXPECT_EQ(b.ReadAvailable(), 3U);
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EXPECT_EQ(ToStringView(b.Read()), "cd"sv);
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b.Consume(2);
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// "e___"
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EXPECT_EQ(b.WriteAvailable(), 2U);
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EXPECT_EQ(b.ReadAvailable(), 1U);
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EXPECT_EQ(ToStringView(b.Read()), "e"sv);
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}
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TEST(RingBuffer, ReadFromWriteTo)
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{
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RingBuffer<char> b{4};
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EXPECT_EQ(b.WriteAvailable(), 4U);
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EXPECT_EQ(b.ReadAvailable(), 0U);
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EXPECT_EQ(b.WriteFrom(std::span{"abcdef"sv}), 4U);
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// "abcd_"
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EXPECT_EQ(b.WriteAvailable(), 0U);
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EXPECT_EQ(b.ReadAvailable(), 4U);
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{
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std::array<char, 3> d;
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EXPECT_EQ(b.ReadTo(d), 3U);
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// "___d_"
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EXPECT_EQ(ToStringView(d), "abc"sv);
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}
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EXPECT_EQ(b.WriteAvailable(), 3U);
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EXPECT_EQ(b.ReadAvailable(), 1U);
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EXPECT_EQ(b.WriteFrom(std::span{"gh"sv}), 2U);
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// "h__dg"
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EXPECT_EQ(b.WriteAvailable(), 1U);
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EXPECT_EQ(b.ReadAvailable(), 3U);
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{
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std::array<char, 5> d;
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EXPECT_EQ(b.ReadTo(d), 3U);
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// "_____"
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EXPECT_EQ(ToStringView(d).substr(0, 3), "dgh"sv);
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}
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EXPECT_EQ(b.WriteAvailable(), 4U);
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EXPECT_EQ(b.ReadAvailable(), 0U);
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}
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