add more tests for search feature

src/search.rs

@@ -151,3 +151,20 @@ impl Search {
         None
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn matches() {
+        let mut s = Search::default();
+        s.set_pattern("fo+").unwrap();
+
+        let m: Vec<_> = s.matches("fo foo bar fooo").unwrap().collect();
+        assert_eq!(m, [(0, 2), (3, 6), (11, 15)]);
+
+        s.set_pattern("").unwrap();
+        assert!(s.matches("fo foo bar fooo").is_none());
+    }
+}

tests/search.rs

@@ -3,7 +3,7 @@
 use tui_textarea::{CursorMove, TextArea};
 
 #[test]
-fn search_forward() {
+fn search_lines_forward() {
     #[rustfmt::skip]
     let mut textarea = TextArea::from([
         "fooo foo",
@@ -20,13 +20,13 @@ fn search_forward() {
     for (i, pos) in expected.into_iter().enumerate() {
         let moved = textarea.search_forward(false);
         let cursor = textarea.cursor();
-        assert!(moved, "{}th move didn't happen: {:?}", i, cursor);
-        assert_eq!(pos, cursor, "{}th move is unexpected", i);
+        assert!(moved, "{}th move didn't happen: {:?}", i + 1, cursor);
+        assert_eq!(pos, cursor, "{}th position is unexpected", i + 1);
     }
 }
 
 #[test]
-fn search_backward() {
+fn search_lines_backward() {
     #[rustfmt::skip]
     let mut textarea = TextArea::from([
         "fooo foo",
@@ -43,8 +43,44 @@ fn search_backward() {
     for (i, pos) in expected.into_iter().enumerate() {
         let moved = textarea.search_back(false);
         let cursor = textarea.cursor();
-        assert!(moved, "{}th move didn't happen: {:?}", i, cursor);
-        assert_eq!(pos, cursor, "{}th move is unexpected", i);
+        assert!(moved, "{}th move didn't happen: {:?}", i + 1, cursor);
+        assert_eq!(pos, cursor, "{}th position is unexpected", i + 1);
+    }
+}
+
+#[test]
+fn search_forward_within_line() {
+    let mut textarea = TextArea::from(["foo fo foo fooo"]);
+
+    // Move to 'f' on 'fo'
+    textarea.move_cursor(CursorMove::Jump(0, 4));
+
+    textarea.set_search_pattern("fo+").unwrap();
+
+    let expected = [(0, 7), (0, 11), (0, 0), (0, 4)];
+    for (i, pos) in expected.into_iter().enumerate() {
+        let moved = textarea.search_forward(false);
+        let cursor = textarea.cursor();
+        assert!(moved, "{}th move didn't happen: {:?}", i + 1, cursor);
+        assert_eq!(pos, cursor, "{}th position is unexpected", i + 1);
+    }
+}
+
+#[test]
+fn search_backward_within_line() {
+    let mut textarea = TextArea::from(["foo fo foo fooo"]);
+
+    // Move to 'f' on 'fo'
+    textarea.move_cursor(CursorMove::Jump(0, 4));
+
+    textarea.set_search_pattern("fo+").unwrap();
+
+    let expected = [(0, 0), (0, 11), (0, 7), (0, 4)];
+    for (i, pos) in expected.into_iter().enumerate() {
+        let moved = textarea.search_back(false);
+        let cursor = textarea.cursor();
+        assert!(moved, "{}th move didn't happen: {:?}", i + 1, cursor);
+        assert_eq!(pos, cursor, "{}th position is unexpected", i + 1);
     }
 }
 
@@ -71,13 +107,26 @@ fn accept_cursor_position() {
 
 #[test]
 fn set_search_pattern() {
-    let mut textarea = TextArea::default();
+    let mut textarea = TextArea::from(["foo"]);
 
     assert!(textarea.search_pattern().is_none());
+    assert!(!textarea.search_forward(true));
+    assert!(!textarea.search_forward(false));
+    assert!(!textarea.search_back(true));
+    assert!(!textarea.search_back(false));
+
     textarea.set_search_pattern("(foo").unwrap_err();
     assert!(textarea.search_pattern().is_none());
 
     textarea.set_search_pattern("(fo+)ba+r").unwrap();
     let pat = textarea.search_pattern().unwrap();
     assert_eq!(pat.as_str(), "(fo+)ba+r");
+
+    textarea.set_search_pattern("fo+").unwrap();
+    textarea.set_search_pattern("").unwrap();
+    assert!(textarea.search_pattern().is_none());
+    assert!(!textarea.search_forward(true));
+    assert!(!textarea.search_forward(false));
+    assert!(!textarea.search_back(true));
+    assert!(!textarea.search_back(false));
 }