test: dotnu_completions +2

Author: blindFS

crates/nu-cli/src/completions/dotnu_completions.rs

@@ -37,11 +37,11 @@ impl Completer for DotNuCompletion {
 
         let (base, partial) = if prefix_str == "~" {
             ("~", "")
-        } else if let Some((parent, remain)) = prefix_str.split_once(is_separator) {
+        } else if let Some((parent, remain)) = prefix_str.rsplit_once(is_separator) {
             // If prefix_str is only a word we want to search in the current dir.
             // "/xx" should be split to "/" and "xx".
             if parent.is_empty() {
-                ("/", remain)
+                (MAIN_SEPARATOR_STR, remain)
             } else {
                 (parent, remain)
             }
@@ -125,7 +125,7 @@ impl Completer for DotNuCompletion {
                 let mut span_offset = 0;
                 let mut value = x.path.to_string();
                 // Complete only the last path component
-                if base_dir == "/" {
+                if base_dir == MAIN_SEPARATOR_STR {
                     span_offset = base_dir.len()
                 } else if base_dir != "." {
                     span_offset = base_dir.len() + 1

crates/nu-cli/tests/completions/mod.rs

@@ -343,6 +343,20 @@ fn dotnu_completions() {
     let suggestions = completer.complete(&completion_str, completion_str.len());
 
     match_suggestions(&expected, &suggestions);
+
+    // Test special paths
+    #[cfg(windows)]
+    let completion_str = "use \\b".to_string();
+    #[cfg(not(windows))]
+    let completion_str = "use /b".to_string();
+    let suggestions = completer.complete(&completion_str, completion_str.len());
+
+    assert!(!suggestions.is_empty());
+
+    let completion_str = "use ~".to_string();
+    let suggestions = completer.complete(&completion_str, completion_str.len());
+
+    assert!(!suggestions.is_empty());
 }
 
 #[test]