add BufferLineWalker unit tests
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test/src/test_BufferLineWalker.cc
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180
test/src/test_BufferLineWalker.cc
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#include "gtest/gtest.h"
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#include "BufferLineWalker.h"
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class MyCharacterWidthDeterminer : public CharacterWidthDeterminer
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{
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int operator()(uint32_t character)
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{
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if (character < 32)
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{
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return 2;
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}
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else
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{
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return 1;
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}
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}
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} cld;
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TEST(BufferLineWalkerTest, calls_callback_once_for_empty_line)
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{
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static const uint8_t data[] = "\n";
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std::shared_ptr<Buffer> b = std::make_shared<Buffer>(data, 1u);
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BufferLineWalker blw(b, cld);
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blw.set_width(20);
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std::shared_ptr<Buffer::Iterator> start_of_line = b->add_iterator();
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int times_called = 0;
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blw.walk_line(*start_of_line, [×_called](int row_offset, int screen_column, int virtual_column, int character_width, const Buffer::Iterator & it) -> bool {
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times_called++;
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EXPECT_EQ(0, row_offset);
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EXPECT_EQ(0, screen_column);
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EXPECT_EQ(0, virtual_column);
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EXPECT_EQ(0, character_width);
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return true;
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});
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EXPECT_EQ(1, times_called);
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}
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TEST(BufferLineWalkerTest, walks_correctly_with_tabs_and_no_line_wrapping)
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{
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static const char data[] = "\t1\t12\t123\t1234\t!";
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std::shared_ptr<Buffer> b = std::make_shared<Buffer>((const uint8_t *)data, strlen(data));
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BufferLineWalker blw(b, cld);
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blw.set_width(100);
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std::shared_ptr<Buffer::Iterator> start_of_line = b->add_iterator();
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int times_called = 0;
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blw.walk_line(*start_of_line, [×_called](int row_offset, int screen_column, int virtual_column, int character_width, const Buffer::Iterator & it) -> bool {
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EXPECT_EQ(0, row_offset);
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static int expected_screen_columns[] = {
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0, 4, 5, 8, 9, 10, 12, 13, 14, 15, 16, 17, 18, 19, 20, 24, 25
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};
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static int expected_character_widths[] = {
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4, 1, 3, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 4, 1, 0
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};
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EXPECT_LT(times_called, (int)(sizeof(expected_screen_columns)/sizeof(expected_screen_columns[0])));
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EXPECT_EQ(expected_screen_columns[times_called], screen_column);
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EXPECT_EQ(expected_screen_columns[times_called], virtual_column);
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EXPECT_EQ(expected_character_widths[times_called], character_width);
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times_called++;
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return true;
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});
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EXPECT_EQ((int)strlen(data) + 1, times_called);
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}
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TEST(BufferLineWalkerTest, walks_correctly_with_tabs_and_line_wrapping)
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{
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static const char data[] = "\t1\t12\t123\t1234\t!";
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std::shared_ptr<Buffer> b = std::make_shared<Buffer>((const uint8_t *)data, strlen(data));
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BufferLineWalker blw(b, cld);
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blw.set_width(5);
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std::shared_ptr<Buffer::Iterator> start_of_line = b->add_iterator();
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int times_called = 0;
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blw.walk_line(*start_of_line, [×_called](int row_offset, int screen_column, int virtual_column, int character_width, const Buffer::Iterator & it) -> bool {
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static int expected_screen_columns[] = {
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0, 4, 0, 3, 4, 0, 2, 3, 4, 0, 1, 2, 3, 4, 0, 4, 0
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};
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static int expected_row_offsets[] = {
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0, 0, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 3, 4, 4, 5
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};
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static int expected_virtual_columns[] = {
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0, 4, 5, 8, 9, 10, 12, 13, 14, 15, 16, 17, 18, 19, 20, 24, 25
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};
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static int expected_character_widths[] = {
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4, 1, 3, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 4, 1, 0
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};
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EXPECT_LT(times_called, (int)(sizeof(expected_screen_columns)/sizeof(expected_screen_columns[0])));
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EXPECT_EQ(expected_row_offsets[times_called], row_offset);
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EXPECT_EQ(expected_screen_columns[times_called], screen_column);
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EXPECT_EQ(expected_virtual_columns[times_called], virtual_column);
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EXPECT_EQ(expected_character_widths[times_called], character_width);
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times_called++;
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return true;
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});
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EXPECT_EQ((int)strlen(data) + 1, times_called);
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}
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TEST(BufferLineWalkerTest, walks_correctly_with_multi_column_characters_and_line_wrapping)
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{
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static const char data[] = "ab\002xyz\003.";
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std::shared_ptr<Buffer> b = std::make_shared<Buffer>((const uint8_t *)data, strlen(data));
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BufferLineWalker blw(b, cld);
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blw.set_width(4);
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std::shared_ptr<Buffer::Iterator> start_of_line = b->add_iterator();
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int times_called = 0;
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blw.walk_line(*start_of_line, [×_called](int row_offset, int screen_column, int virtual_column, int character_width, const Buffer::Iterator & it) -> bool {
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static int expected_screen_columns[] = {
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0, 1, 2, 0, 1, 2, 0, 2, 3
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};
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static int expected_row_offsets[] = {
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0, 0, 0, 1, 1, 1, 2, 2, 2
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};
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static int expected_virtual_columns[] = {
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0, 1, 2, 4, 5, 6, 7, 9, 10
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};
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static int expected_character_widths[] = {
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1, 1, 2, 1, 1, 1, 2, 1, 0
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};
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EXPECT_LT(times_called, (int)(sizeof(expected_screen_columns)/sizeof(expected_screen_columns[0])));
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EXPECT_EQ(expected_row_offsets[times_called], row_offset);
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EXPECT_EQ(expected_screen_columns[times_called], screen_column);
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EXPECT_EQ(expected_virtual_columns[times_called], virtual_column);
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EXPECT_EQ(expected_character_widths[times_called], character_width);
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times_called++;
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return true;
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});
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EXPECT_EQ((int)strlen(data) + 1, times_called);
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}
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TEST(BufferLineWalkerTest, does_not_push_down_a_row_when_a_multi_column_character_is_wider_than_view_width)
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{
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static const char data[] = "\002\003";
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std::shared_ptr<Buffer> b = std::make_shared<Buffer>((const uint8_t *)data, strlen(data));
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BufferLineWalker blw(b, cld);
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blw.set_width(1);
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std::shared_ptr<Buffer::Iterator> start_of_line = b->add_iterator();
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int times_called = 0;
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blw.walk_line(*start_of_line, [×_called](int row_offset, int screen_column, int virtual_column, int character_width, const Buffer::Iterator & it) -> bool {
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static int expected_screen_columns[] = {
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0, 0, 0
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};
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static int expected_row_offsets[] = {
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0, 1, 2
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};
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static int expected_virtual_columns[] = {
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0, 2, 4
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};
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static int expected_character_widths[] = {
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2, 2, 0
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};
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EXPECT_LT(times_called, (int)(sizeof(expected_screen_columns)/sizeof(expected_screen_columns[0])));
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EXPECT_EQ(expected_row_offsets[times_called], row_offset);
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EXPECT_EQ(expected_screen_columns[times_called], screen_column);
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EXPECT_EQ(expected_virtual_columns[times_called], virtual_column);
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EXPECT_EQ(expected_character_widths[times_called], character_width);
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times_called++;
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return true;
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});
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EXPECT_EQ((int)strlen(data) + 1, times_called);
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}
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TEST(BufferLineWalkerTest, stops_iterating_when_callback_returns_false)
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{
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static const char data[] = "abcdef";
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std::shared_ptr<Buffer> b = std::make_shared<Buffer>((const uint8_t *)data, strlen(data));
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BufferLineWalker blw(b, cld);
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blw.set_width(6);
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std::shared_ptr<Buffer::Iterator> start_of_line = b->add_iterator();
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int times_called = 0;
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blw.walk_line(*start_of_line, [×_called](int row_offset, int screen_column, int virtual_column, int character_width, const Buffer::Iterator & it) -> bool {
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times_called++;
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if (times_called >= 3)
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{
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return false;
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}
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else
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{
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return true;
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}
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});
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EXPECT_EQ(3, times_called);
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}
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