Merge #2329

2329: fix 2190; add test for "replace if let with match" r=matklad a=fkohlgrueber

Fixes #2190.

Check that the expression doesn't contain newlines only for "replace if let with match". For "join lines", enclosing blocks for multiline expressions should be removed. 

Co-authored-by: Felix Kohlgrüber <[email protected]>

1 files changed, 30 insertions, 2 deletions

diff --git a/crates/ra_assists/src/assists/replace_if_let_with_match.rs b/crates/ra_assists/src/assists/replace_if_let_with_match.rs
index dff84d865..3272801ff 100644
--- a/crates/ra_assists/src/assists/replace_if_let_with_match.rs
+++ b/crates/ra_assists/src/assists/replace_if_let_with_match.rs
@@ -66,8 +66,8 @@ fn build_match_expr(
 
 fn format_arm(block: &ast::BlockExpr) -> String {
     match extract_trivial_expression(block) {
-        None => block.syntax().text().to_string(),
-        Some(e) => format!("{},", e.syntax().text()),
+        Some(e) if !e.syntax().text().contains_char('\n') => format!("{},", e.syntax().text()),
+        _ => block.syntax().text().to_string(),
     }
 }
 
@@ -103,6 +103,34 @@ impl VariantData {
     }
 
     #[test]
+    fn test_replace_if_let_with_match_doesnt_unwrap_multiline_expressions() {
+        check_assist(
+            replace_if_let_with_match,
+            "
+fn foo() {
+    if <|>let VariantData::Struct(..) = a {
+        bar(
+            123
+        )
+    } else {
+        false
+    }
+}           ",
+            "
+fn foo() {
+    <|>match a {
+        VariantData::Struct(..) => {
+            bar(
+                123
+            )
+        }
+        _ => false,
+    }
+}           ",
+        )
+    }
+
+    #[test]
     fn replace_if_let_with_match_target() {
         check_assist_target(
             replace_if_let_with_match,