move required_hashes into utils

crates/ide-assists/src/handlers/desugar_doc_comment.rs

@@ -5,11 +5,10 @@
     AstToken, TextRange,
 };
 
-use crate::{AssistContext, AssistId, AssistKind, Assists};
-
-use super::{
-    convert_comment_block::{line_comment_text, relevant_line_comments},
-    raw_string::required_hashes,
+use crate::{
+    handlers::convert_comment_block::{line_comment_text, relevant_line_comments},
+    utils::required_hashes,
+    AssistContext, AssistId, AssistKind, Assists,
 };
 
 // Assist: desugar_doc_comment

crates/ide-assists/src/handlers/raw_string.rs

@@ -2,7 +2,7 @@
 
 use syntax::{ast, ast::IsString, AstToken, TextRange, TextSize};
 
-use crate::{AssistContext, AssistId, AssistKind, Assists};
+use crate::{utils::required_hashes, AssistContext, AssistId, AssistKind, Assists};
 
 // Assist: make_raw_string
 //
@@ -155,33 +155,12 @@ pub(crate) fn remove_hash(acc: &mut Assists, ctx: &AssistContext<'_>) -> Option<
     })
 }
 
-pub(crate) fn required_hashes(s: &str) -> usize {
-    let mut res = 0usize;
-    for idx in s.match_indices('"').map(|(i, _)| i) {
-        let (_, sub) = s.split_at(idx + 1);
-        let n_hashes = sub.chars().take_while(|c| *c == '#').count();
-        res = res.max(n_hashes + 1)
-    }
-    res
-}
-
 #[cfg(test)]
 mod tests {
     use crate::tests::{check_assist, check_assist_not_applicable, check_assist_target};
 
     use super::*;
 
-    #[test]
-    fn test_required_hashes() {
-        assert_eq!(0, required_hashes("abc"));
-        assert_eq!(0, required_hashes("###"));
-        assert_eq!(1, required_hashes("\""));
-        assert_eq!(2, required_hashes("\"#abc"));
-        assert_eq!(0, required_hashes("#abc"));
-        assert_eq!(3, required_hashes("#ab\"##c"));
-        assert_eq!(5, required_hashes("#ab\"##\"####c"));
-    }
-
     #[test]
     fn make_raw_string_target() {
         check_assist_target(

crates/ide-assists/src/utils.rs

@@ -758,3 +758,25 @@ pub(crate) fn convert_param_list_to_arg_list(list: ast::ParamList) -> ast::ArgLi
     }
     make::arg_list(args)
 }
+
+/// Calculate the number of hashes required for a raw string containing `s`
+pub(crate) fn required_hashes(s: &str) -> usize {
+    #[test]
+    fn test_required_hashes() {
+        assert_eq!(0, required_hashes("abc"));
+        assert_eq!(0, required_hashes("###"));
+        assert_eq!(1, required_hashes("\""));
+        assert_eq!(2, required_hashes("\"#abc"));
+        assert_eq!(0, required_hashes("#abc"));
+        assert_eq!(3, required_hashes("#ab\"##c"));
+        assert_eq!(5, required_hashes("#ab\"##\"####c"));
+    }
+
+    let mut res = 0usize;
+    for idx in s.match_indices('"').map(|(i, _)| i) {
+        let (_, sub) = s.split_at(idx + 1);
+        let n_hashes = sub.chars().take_while(|c| *c == '#').count();
+        res = res.max(n_hashes + 1)
+    }
+    res
+}