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Diffstat (limited to 't/unit-tests/u-utf8-width.c')
| -rw-r--r-- | t/unit-tests/u-utf8-width.c | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/t/unit-tests/u-utf8-width.c b/t/unit-tests/u-utf8-width.c new file mode 100644 index 0000000000..86e09c3574 --- /dev/null +++ b/t/unit-tests/u-utf8-width.c @@ -0,0 +1,134 @@ +#include "unit-test.h" +#include "utf8.h" +#include "strbuf.h" + +/* + * Test utf8_strnwidth with various Chinese strings + * Chinese characters typically have a width of 2 columns when displayed + */ +void test_utf8_width__strnwidth_chinese(void) +{ + const char *str; + + /* Test basic ASCII - each character should have width 1 */ + cl_assert_equal_i(5, utf8_strnwidth("Hello", 5, 0)); + /* skip_ansi = 1 */ + cl_assert_equal_i(5, utf8_strnwidth("Hello", 5, 1)); + + /* Test simple Chinese characters - each should have width 2 */ + /* "你好" is 6 bytes (3 bytes per char in UTF-8), 4 display columns */ + cl_assert_equal_i(4, utf8_strnwidth("你好", 6, 0)); + + /* Test mixed ASCII and Chinese - ASCII = 1 column, Chinese = 2 columns */ + /* "h"(1) + "i"(1) + "你"(2) + "好"(2) = 6 */ + cl_assert_equal_i(6, utf8_strnwidth("Hi你好", 8, 0)); + + /* Test longer Chinese string */ + /* 5 Chinese chars = 10 display columns */ + cl_assert_equal_i(10, utf8_strnwidth("你好世界！", 15, 0)); + + /* Test individual Chinese character width */ + cl_assert_equal_i(2, utf8_strnwidth("中", 3, 0)); + + /* Test empty string */ + cl_assert_equal_i(0, utf8_strnwidth("", 0, 0)); + + /* Test length limiting */ + str = "你好世界"; + /* Only first char "你"(2 columns) within 3 bytes */ + cl_assert_equal_i(2, utf8_strnwidth(str, 3, 0)); + /* First two chars "你好"(4 columns) in 6 bytes */ + cl_assert_equal_i(4, utf8_strnwidth(str, 6, 0)); +} + +/* + * Tests for utf8_strwidth (simpler version without length limit) + */ +void test_utf8_width__strwidth_chinese(void) +{ + /* Test basic ASCII */ + cl_assert_equal_i(5, utf8_strwidth("Hello")); + + /* Test Chinese characters */ + /* 2 Chinese chars = 4 display columns */ + cl_assert_equal_i(4, utf8_strwidth("你好")); + + /* Test longer Chinese string */ + /* 5 Chinese chars = 10 display columns */ + cl_assert_equal_i(10, utf8_strwidth("你好世界！")); + + /* Test mixed ASCII and Chinese */ + /* 5 ASCII (5 cols) + 2 Chinese (4 cols) = 9 */ + cl_assert_equal_i(9, utf8_strwidth("Hello世界")); + /* 2 ASCII (2 cols) + 2 Chinese (4 cols) + 1 ASCII (1 col) = 7 */ + cl_assert_equal_i(7, utf8_strwidth("Hi世界!")); +} + +/* + * Additional tests with other East Asian characters + */ +void test_utf8_width__strnwidth_japanese_korean(void) +{ + /* Japanese characters (should also be 2 columns each) */ + /* 5 Japanese chars x 2 cols each = 10 display columns */ + cl_assert_equal_i(10, utf8_strnwidth("こんにちは", 15, 0)); + + /* Korean characters (should also be 2 columns each) */ + /* 5 Korean chars x 2 cols each = 10 display columns */ + cl_assert_equal_i(10, utf8_strnwidth("안녕하세요", 15, 0)); +} + +/* + * Test utf8_strnwidth with CJK strings and ANSI sequences + */ +void test_utf8_width__strnwidth_cjk_with_ansi(void) +{ + /* Test CJK with ANSI sequences */ + const char *ansi_test = "\033[1m你好\033[0m"; + int width = utf8_strnwidth(ansi_test, strlen(ansi_test), 1); + /* Should skip ANSI sequences and count "你好" as 4 columns */ + cl_assert_equal_i(4, width); + + /* Test mixed ASCII, CJK, and ANSI */ + ansi_test = "Hello\033[32m世界\033[0m!"; + width = utf8_strnwidth(ansi_test, strlen(ansi_test), 1); + /* "Hello"(5) + "世界"(4) + "!"(1) = 10 */ + cl_assert_equal_i(10, width); +} + +/* + * Test the strbuf_utf8_align function with CJK characters + */ +void test_utf8_width__strbuf_utf8_align(void) +{ + struct strbuf buf = STRBUF_INIT; + + /* Test left alignment with CJK */ + strbuf_utf8_align(&buf, ALIGN_LEFT, 10, "你好"); + /* Since "你好" is 4 display columns, we need 6 more spaces to reach 10 */ + cl_assert_equal_s("你好 ", buf.buf); + strbuf_reset(&buf); + + /* Test right alignment with CJK */ + strbuf_utf8_align(&buf, ALIGN_RIGHT, 8, "世界"); + /* "世界" is 4 display columns, so we need 4 leading spaces */ + cl_assert_equal_s(" 世界", buf.buf); + strbuf_reset(&buf); + + /* Test center alignment with CJK */ + strbuf_utf8_align(&buf, ALIGN_MIDDLE, 10, "中"); + /* "中" is 2 display columns, so (10-2)/2 = 4 spaces on left, 4 on right */ + cl_assert_equal_s(" 中 ", buf.buf); + strbuf_reset(&buf); + + strbuf_utf8_align(&buf, ALIGN_MIDDLE, 5, "中"); + /* "中" is 2 display columns, so (5-2)/2 = 1 spaces on left, 2 on right */ + cl_assert_equal_s(" 中 ", buf.buf); + strbuf_reset(&buf); + + /* Test alignment that is smaller than string width */ + strbuf_utf8_align(&buf, ALIGN_LEFT, 2, "你好"); + /* Since "你好" is 4 display columns, it should not be truncated */ + cl_assert_equal_s("你好", buf.buf); + strbuf_release(&buf); +} |