bendns' repos / rust-analyzer
Unnamed repository; edit this file 'description' to name the repository.
Diffstat (limited to 'crates/ide-db/src/tests/line_index.rs')
-rw-r--r--crates/ide-db/src/tests/line_index.rs49
1 files changed, 49 insertions, 0 deletions
diff --git a/crates/ide-db/src/tests/line_index.rs b/crates/ide-db/src/tests/line_index.rs
new file mode 100644
index 0000000000..6b49bb2631
--- /dev/null
+++ b/crates/ide-db/src/tests/line_index.rs
@@ -0,0 +1,49 @@
+use line_index::{LineCol, LineIndex, WideEncoding};
+use test_utils::skip_slow_tests;
+
+#[test]
+fn test_every_chars() {
+ if skip_slow_tests() {
+ return;
+ }
+
+ let text: String = {
+ let mut chars: Vec<char> = ((0 as char)..char::MAX).collect(); // Neat!
+ chars.extend("\n".repeat(chars.len() / 16).chars());
+ let mut rng = oorandom::Rand32::new(stdx::rand::seed());
+ stdx::rand::shuffle(&mut chars, |i| rng.rand_range(0..i as u32) as usize);
+ 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;
+ }
+ }
+}