| // Copyright 2021 The PDFium Authors |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "core/fxcrt/span_util.h" |
| |
| #include <vector> |
| |
| #include "testing/gtest/include/gtest/gtest.h" |
| |
| TEST(Spanset, Fits) { |
| std::vector<char> dst(4, 'B'); |
| fxcrt::spanset(pdfium::make_span(dst).first(2), 'A'); |
| EXPECT_EQ(dst[0], 'A'); |
| EXPECT_EQ(dst[1], 'A'); |
| EXPECT_EQ(dst[2], 'B'); |
| EXPECT_EQ(dst[3], 'B'); |
| } |
| |
| TEST(Spanset, Empty) { |
| std::vector<char> dst(4, 'B'); |
| fxcrt::spanset(pdfium::make_span(dst).subspan(4), 'A'); |
| EXPECT_EQ(dst[0], 'B'); |
| EXPECT_EQ(dst[1], 'B'); |
| EXPECT_EQ(dst[2], 'B'); |
| EXPECT_EQ(dst[3], 'B'); |
| } |
| |
| TEST(Spancpy, FitsEntirely) { |
| std::vector<char> src(4, 'A'); |
| std::vector<char> dst(4, 'B'); |
| auto remain = fxcrt::spancpy(pdfium::make_span(dst), pdfium::make_span(src)); |
| EXPECT_EQ(dst[0], 'A'); |
| EXPECT_EQ(dst[1], 'A'); |
| EXPECT_EQ(dst[2], 'A'); |
| EXPECT_EQ(dst[3], 'A'); |
| EXPECT_TRUE(remain.empty()); |
| } |
| |
| TEST(Spancpy, FitsWithin) { |
| std::vector<char> src(2, 'A'); |
| std::vector<char> dst(4, 'B'); |
| // Also show that a const src argument is acceptable. |
| auto remain = fxcrt::spancpy(pdfium::make_span(dst).subspan(1), |
| pdfium::span<const char>(src)); |
| EXPECT_EQ(dst[0], 'B'); |
| EXPECT_EQ(dst[1], 'A'); |
| EXPECT_EQ(dst[2], 'A'); |
| EXPECT_EQ(dst[3], 'B'); |
| EXPECT_EQ(remain.size(), 1u); |
| EXPECT_EQ(remain.data(), &dst[3]); |
| } |
| |
| TEST(Spancpy, EmptyCopyWithin) { |
| std::vector<char> src(2, 'A'); |
| std::vector<char> dst(4, 'B'); |
| auto remain = fxcrt::spancpy(pdfium::make_span(dst).subspan(1), |
| pdfium::make_span(src).subspan(2)); |
| EXPECT_EQ(dst[0], 'B'); |
| EXPECT_EQ(dst[1], 'B'); |
| EXPECT_EQ(dst[2], 'B'); |
| EXPECT_EQ(dst[3], 'B'); |
| EXPECT_EQ(remain.size(), 3u); |
| EXPECT_EQ(remain.data(), &dst[1]); |
| } |
| |
| TEST(Spancpy, EmptyCopyToEmpty) { |
| std::vector<char> src(2, 'A'); |
| std::vector<char> dst(4, 'B'); |
| auto remain = fxcrt::spancpy(pdfium::make_span(dst).subspan(4), |
| pdfium::make_span(src).subspan(2)); |
| EXPECT_EQ(dst[0], 'B'); |
| EXPECT_EQ(dst[1], 'B'); |
| EXPECT_EQ(dst[2], 'B'); |
| EXPECT_EQ(dst[3], 'B'); |
| EXPECT_TRUE(remain.empty()); |
| } |
| |
| TEST(Spanmove, FitsWithin) { |
| std::vector<char> src(2, 'A'); |
| std::vector<char> dst(4, 'B'); |
| // Also show that a const src argument is acceptable. |
| auto remain = fxcrt::spanmove(pdfium::make_span(dst).subspan(1), |
| pdfium::span<const char>(src)); |
| EXPECT_EQ(dst[0], 'B'); |
| EXPECT_EQ(dst[1], 'A'); |
| EXPECT_EQ(dst[2], 'A'); |
| EXPECT_EQ(dst[3], 'B'); |
| EXPECT_EQ(remain.size(), 1u); |
| EXPECT_EQ(remain.data(), &dst[3]); |
| } |
| |
| TEST(SpanEquals, Empty) { |
| std::vector<int> vec = {1, 2}; |
| std::vector<int> vec2 = {3, 4}; |
| pdfium::span<int> empty; |
| pdfium::span<int> some = pdfium::make_span(vec); |
| pdfium::span<int> some2 = pdfium::make_span(vec2); |
| EXPECT_FALSE(fxcrt::span_equals(empty, some)); |
| EXPECT_FALSE(fxcrt::span_equals(some, empty)); |
| EXPECT_TRUE(fxcrt::span_equals(empty, empty)); |
| EXPECT_TRUE(fxcrt::span_equals(empty, some.first(0))); |
| EXPECT_TRUE(fxcrt::span_equals(some.first(0), empty)); |
| EXPECT_TRUE(fxcrt::span_equals(some2.first(0), some.first(0))); |
| EXPECT_TRUE(fxcrt::span_equals(some.first(0), some2.first(0))); |
| } |
| |
| TEST(SpanEquals, NonEmpty) { |
| std::vector<int> vec = {1, 2, 3}; |
| std::vector<int> vec2 = {1, 2, 4}; |
| pdfium::span<int> some = pdfium::make_span(vec); |
| pdfium::span<int> some2 = pdfium::make_span(vec2); |
| EXPECT_FALSE(fxcrt::span_equals(some, some2)); |
| EXPECT_FALSE(fxcrt::span_equals(some.first(2), some2)); |
| EXPECT_FALSE(fxcrt::span_equals(some, some2.first(2))); |
| EXPECT_TRUE(fxcrt::span_equals(some.first(2), some2.first(2))); |
| } |
| |
| TEST(Span, AssignOverOnePastEnd) { |
| std::vector<char> src(2, 'A'); |
| pdfium::span<char> span = pdfium::make_span(src); |
| span = span.subspan(2); |
| span = pdfium::make_span(src); |
| EXPECT_EQ(span.size(), 2u); |
| } |
| |
| TEST(ReinterpretSpan, Empty) { |
| pdfium::span<uint8_t> empty; |
| pdfium::span<uint32_t> converted = fxcrt::reinterpret_span<uint32_t>(empty); |
| EXPECT_EQ(converted.data(), nullptr); |
| EXPECT_EQ(converted.size(), 0u); |
| } |
| |
| TEST(ReinterpretSpan, LegalConversions) { |
| uint8_t aaaabbbb[8] = {0x61, 0x61, 0x61, 0x61, 0x62, 0x62, 0x62, 0x62}; |
| pdfium::span<uint8_t> original = pdfium::make_span(aaaabbbb); |
| pdfium::span<uint32_t> converted = |
| fxcrt::reinterpret_span<uint32_t>(original); |
| ASSERT_NE(converted.data(), nullptr); |
| ASSERT_EQ(converted.size(), 2u); |
| EXPECT_EQ(converted[0], 0x61616161u); |
| EXPECT_EQ(converted[1], 0x62626262u); |
| } |
| |
| TEST(ReinterpretSpan, BadLength) { |
| uint8_t ab[2] = {0x61, 0x62}; |
| EXPECT_DEATH(fxcrt::reinterpret_span<uint32_t>(pdfium::make_span(ab)), ""); |
| } |
| |
| TEST(ReinterpretSpan, BadAlignment) { |
| uint8_t abcabc[6] = {0x61, 0x62, 0x63, 0x61, 0x62, 0x63}; |
| EXPECT_DEATH(fxcrt::reinterpret_span<uint32_t>( |
| pdfium::make_span(abcabc).subspan(1, 4)), |
| ""); |
| } |