From 1cca6b2a3d4e1981577616d854bca498f4891289 Mon Sep 17 00:00:00 2001
From: Aleksey Kladov <aleksey.kladov@gmail.com>
Date: Tue, 3 Mar 2020 16:56:42 +0100
Subject: Fix applicability of inline local

---
 .../src/handlers/inline_local_variable.rs          | 30 +++++++++++++++++++---
 crates/ra_assists/src/lib.rs                       | 12 ++++-----
 crates/ra_assists/src/marks.rs                     |  2 ++
 3 files changed, 34 insertions(+), 10 deletions(-)

diff --git a/crates/ra_assists/src/handlers/inline_local_variable.rs b/crates/ra_assists/src/handlers/inline_local_variable.rs
index 53a72309b..98e5112df 100644
--- a/crates/ra_assists/src/handlers/inline_local_variable.rs
+++ b/crates/ra_assists/src/handlers/inline_local_variable.rs
@@ -2,9 +2,9 @@ use ra_syntax::{
     ast::{self, AstNode, AstToken},
     TextRange,
 };
+use test_utils::tested_by;
 
-use crate::assist_ctx::ActionBuilder;
-use crate::{Assist, AssistCtx, AssistId};
+use crate::{assist_ctx::ActionBuilder, Assist, AssistCtx, AssistId};
 
 // Assist: inline_local_variable
 //
@@ -29,6 +29,11 @@ pub(crate) fn inline_local_variable(ctx: AssistCtx) -> Option<Assist> {
         _ => return None,
     };
     if bind_pat.is_mutable() {
+        tested_by!(test_not_inline_mut_variable);
+        return None;
+    }
+    if !bind_pat.syntax().text_range().contains_inclusive(ctx.frange.range.start()) {
+        tested_by!(not_applicable_outside_of_bind_pat);
         return None;
     }
     let initializer_expr = let_stmt.initializer()?;
@@ -111,6 +116,8 @@ pub(crate) fn inline_local_variable(ctx: AssistCtx) -> Option<Assist> {
 
 #[cfg(test)]
 mod tests {
+    use test_utils::covers;
+
     use crate::helpers::{check_assist, check_assist_not_applicable};
 
     use super::*;
@@ -317,9 +324,10 @@ fn foo() {
 
     #[test]
     fn test_not_inline_mut_variable() {
+        covers!(test_not_inline_mut_variable);
         check_assist_not_applicable(
             inline_local_variable,
-            "
+            r"
 fn foo() {
     let mut a<|> = 1 + 1;
     a + 1;
@@ -651,11 +659,25 @@ fn foo() {
     fn test_not_applicable_if_variable_unused() {
         check_assist_not_applicable(
             inline_local_variable,
-            "
+            r"
 fn foo() {
     let <|>a = 0;
 }
             ",
         )
     }
+
+    #[test]
+    fn not_applicable_outside_of_bind_pat() {
+        covers!(not_applicable_outside_of_bind_pat);
+        check_assist_not_applicable(
+            inline_local_variable,
+            r"
+fn main() {
+    let x = <|>1 + 2;
+    x * 4;
+}
+",
+        )
+    }
 }
diff --git a/crates/ra_assists/src/lib.rs b/crates/ra_assists/src/lib.rs
index deeada2de..6d81a6396 100644
--- a/crates/ra_assists/src/lib.rs
+++ b/crates/ra_assists/src/lib.rs
@@ -178,19 +178,19 @@ mod helpers {
         (db, file_id)
     }
 
-    pub(crate) fn check_assist(assist: AssistHandler, before: &str, after: &str) {
-        check(assist, before, ExpectedResult::After(after));
+    pub(crate) fn check_assist(assist: AssistHandler, ra_fixture: &str, after: &str) {
+        check(assist, ra_fixture, ExpectedResult::After(after));
     }
 
     // FIXME: instead of having a separate function here, maybe use
     // `extract_ranges` and mark the target as `<target> </target>` in the
     // fixuture?
-    pub(crate) fn check_assist_target(assist: AssistHandler, before: &str, target: &str) {
-        check(assist, before, ExpectedResult::Target(target));
+    pub(crate) fn check_assist_target(assist: AssistHandler, ra_fixture: &str, target: &str) {
+        check(assist, ra_fixture, ExpectedResult::Target(target));
     }
 
-    pub(crate) fn check_assist_not_applicable(assist: AssistHandler, before: &str) {
-        check(assist, before, ExpectedResult::NotApplicable);
+    pub(crate) fn check_assist_not_applicable(assist: AssistHandler, ra_fixture: &str) {
+        check(assist, ra_fixture, ExpectedResult::NotApplicable);
     }
 
     enum ExpectedResult<'a> {
diff --git a/crates/ra_assists/src/marks.rs b/crates/ra_assists/src/marks.rs
index c20e4db9e..cef3df4e5 100644
--- a/crates/ra_assists/src/marks.rs
+++ b/crates/ra_assists/src/marks.rs
@@ -4,4 +4,6 @@ test_utils::marks!(
     introduce_var_in_comment_is_not_applicable
     test_introduce_var_expr_stmt
     test_introduce_var_last_expr
+    not_applicable_outside_of_bind_pat
+    test_not_inline_mut_variable
 );
-- 
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