bendns' repos / rust-analyzer
Unnamed repository; edit this file 'description' to name the repository.
Diffstat (limited to 'lib/line-index/src/tests.rs')
-rw-r--r--lib/line-index/src/tests.rs53
1 files changed, 53 insertions, 0 deletions
diff --git a/lib/line-index/src/tests.rs b/lib/line-index/src/tests.rs
index 981008e346..57fad1dfc0 100644
--- a/lib/line-index/src/tests.rs
+++ b/lib/line-index/src/tests.rs
@@ -142,3 +142,56 @@ fn test_to_wide() {
let wide_line_col = line_index.to_wide(WideEncoding::Utf16, line_col.unwrap());
assert_eq!(wide_line_col, Some(WideLineCol { line: 5, col: 4 }));
}
+
+#[test]
+fn test_every_chars() {
+ let text: String = {
+ let mut chars: Vec<char> = ((0 as char)..char::MAX).collect(); // Neat!
+ chars.extend("\n".repeat(chars.len() / 16).chars());
+ let seed = std::hash::Hasher::finish(&std::hash::BuildHasher::build_hasher(
+ #[allow(clippy::disallowed_types)]
+ &std::collections::hash_map::RandomState::new(),
+ ));
+ let mut rng = oorandom::Rand32::new(seed);
+ let mut rand_index = |i| rng.rand_range(0..i as u32) as usize;
+ let mut remaining = chars.len() - 1;
+ while remaining > 0 {
+ let index = rand_index(remaining);
+ chars.swap(remaining, index);
+ remaining -= 1;
+ }
+ chars.into_iter().collect()
+ };
+ assert!(text.contains('💩')); // Sanity check.
+
+ let line_index = LineIndex::new(&text);
+
+ let mut lin_col = LineCol { line: 0, col: 0 };
+ let mut col_utf16 = 0;
+ let mut col_utf32 = 0;
+ for (offset, c) in text.char_indices() {
+ let got_offset = line_index.offset(lin_col).unwrap();
+ assert_eq!(usize::from(got_offset), offset);
+
+ let got_lin_col = line_index.line_col(got_offset);
+ assert_eq!(got_lin_col, lin_col);
+
+ for (enc, col) in [(WideEncoding::Utf16, col_utf16), (WideEncoding::Utf32, col_utf32)] {
+ let wide_lin_col = line_index.to_wide(enc, lin_col).unwrap();
+ let got_lin_col = line_index.to_utf8(enc, wide_lin_col).unwrap();
+ assert_eq!(got_lin_col, lin_col);
+ assert_eq!(wide_lin_col.col, col)
+ }
+
+ if c == '\n' {
+ lin_col.line += 1;
+ lin_col.col = 0;
+ col_utf16 = 0;
+ col_utf32 = 0;
+ } else {
+ lin_col.col += c.len_utf8() as u32;
+ col_utf16 += c.len_utf16() as u32;
+ col_utf32 += 1;
+ }
+ }
+}