Initial public release of Warp.

Repo-Sync-Origin: warpdotdev/warp-internal@12af1d983b

crates/vim/src/paragraph_iterator_tests.rs

@@ -0,0 +1,108 @@
+use super::*;
+
+#[test]
+fn test_single_paragraph_returns_none_both_directions() {
+    // Single paragraph: no double-newline separator anywhere
+    let text = "p1 line1\np1 line2\np1 line3";
+    let pos = text.find("line2").unwrap();
+
+    assert_eq!(find_previous_paragraph_start(text, pos), None);
+    assert_eq!(find_next_paragraph_end(text, pos), None);
+}
+
+#[test]
+fn test_single_paragraph_surrounded_returns_prev_and_next() {
+    // Single paragraph: no double-newline separator anywhere
+    let text = "\n\n\np1 line1\np1 line2\np1 line3\n\n\n";
+    let pos = text.find("line2").unwrap();
+
+    // The first empty line after the end of the paragraph (the second newline character)
+    let goal_end = text.find("line3").unwrap() + "line3".len() + 1;
+
+    assert_eq!(find_previous_paragraph_start(text, pos), Some(2.into()));
+    assert_eq!(find_next_paragraph_end(text, pos), Some(goal_end.into()));
+}
+
+#[test]
+fn test_next_none_in_last_paragraph_previous_goes_up() {
+    // Two paragraphs separated by one blank line (double newline)
+    let text = "p1\n\np2";
+    let pos_in_p2 = text.find("p2").unwrap();
+
+    // previous should find the boundary before p2: index of the second newline in the pair
+    // for both cursor positioning on the `p` and `2`
+    assert_eq!(
+        find_previous_paragraph_start(text, pos_in_p2),
+        Some((pos_in_p2 - 1).into())
+    );
+    assert_eq!(
+        find_previous_paragraph_start(text, pos_in_p2 + 1),
+        Some((pos_in_p2 - 1).into())
+    );
+    // next should find nothing after the last paragraph
+    assert_eq!(find_next_paragraph_end(text, pos_in_p2), None);
+}
+
+#[test]
+fn test_previous_none_in_first_paragraph_next_goes_down() {
+    let text = "p1\n\np2";
+    let pos_in_p1 = text.find("p1").unwrap();
+
+    // previous should find nothing before the first paragraph
+    assert_eq!(find_previous_paragraph_start(text, pos_in_p1), None);
+    // next should find the boundary after p1: index of the second newline in the pair
+    // for both cursor positioning on the `p` and `1`
+    assert_eq!(
+        find_next_paragraph_end(text, pos_in_p1),
+        Some((pos_in_p1 + "p1".len() + 1).into())
+    );
+    assert_eq!(
+        find_next_paragraph_end(text, pos_in_p1 + 1),
+        Some((pos_in_p1 + "p1".len() + 1).into())
+    );
+}
+
+#[test]
+fn test_three_paragraphs_lots_of_newlines_middle_para() {
+    // Three paragraphs, separated by four newlines each
+    let text = "p1\n\n\n\n".to_string() + "p2\n\n\n\n" + "p3";
+    let pos_in_p2 = text.find("p2").unwrap();
+
+    assert_eq!(
+        find_previous_paragraph_start(text.as_str(), pos_in_p2),
+        Some((pos_in_p2 - 1).into())
+    );
+    assert_eq!(
+        find_next_paragraph_end(text.as_str(), pos_in_p2),
+        Some((pos_in_p2 + "p2".len() + 1).into())
+    );
+}
+
+#[test]
+fn test_cursor_in_middle_of_newline_patch_quad_runs() {
+    // Lots of newlines between paras, but cursor starts in the middle of the newlines
+    let text = "p1\n\n\n\n\n\n".to_string() + "p2\n\n\n\n\n\n" + "p3";
+    let pos_between_p1_p2 = "p1".len() + 3;
+    let pos_p2 = text.find("p2").unwrap();
+    let pos_between_p2_p3 = pos_p2 + "p2".len() + 3;
+
+    // Place cursor amongst newlines between p1 and p2
+    assert_eq!(
+        find_previous_paragraph_start(text.as_str(), pos_between_p1_p2),
+        None
+    );
+    assert_eq!(
+        find_next_paragraph_end(text.as_str(), pos_between_p1_p2),
+        Some((pos_p2 + "p2".len() + 1).into())
+    );
+
+    // Place cursor amongst newlines between p2 and p3
+    assert_eq!(
+        find_previous_paragraph_start(text.as_str(), pos_between_p2_p3),
+        Some((pos_p2 - 1).into())
+    );
+    assert_eq!(
+        find_next_paragraph_end(text.as_str(), pos_between_p2_p3),
+        None
+    );
+}