4 files changed, 85 insertions, 57 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..eb5112343 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::*;
@@ -119,7 +126,7 @@ mod tests {
     fn test_inline_let_bind_literal_expr() {
         check_assist(
             inline_local_variable,
-            "
+            r"
 fn bar(a: usize) {}
 fn foo() {
     let a<|> = 1;
@@ -133,7 +140,7 @@ fn foo() {
     let b = a * 10;
     bar(a);
 }",
-            "
+            r"
 fn bar(a: usize) {}
 fn foo() {
     <|>1 + 1;
@@ -153,7 +160,7 @@ fn foo() {
     fn test_inline_let_bind_bin_expr() {
         check_assist(
             inline_local_variable,
-            "
+            r"
 fn bar(a: usize) {}
 fn foo() {
     let a<|> = 1 + 1;
@@ -167,7 +174,7 @@ fn foo() {
     let b = a * 10;
     bar(a);
 }",
-            "
+            r"
 fn bar(a: usize) {}
 fn foo() {
     <|>(1 + 1) + 1;
@@ -187,7 +194,7 @@ fn foo() {
     fn test_inline_let_bind_function_call_expr() {
         check_assist(
             inline_local_variable,
-            "
+            r"
 fn bar(a: usize) {}
 fn foo() {
     let a<|> = bar(1);
@@ -201,7 +208,7 @@ fn foo() {
     let b = a * 10;
     bar(a);
 }",
-            "
+            r"
 fn bar(a: usize) {}
 fn foo() {
     <|>bar(1) + 1;
@@ -221,7 +228,7 @@ fn foo() {
     fn test_inline_let_bind_cast_expr() {
         check_assist(
             inline_local_variable,
-            "
+            r"
 fn bar(a: usize): usize { a }
 fn foo() {
     let a<|> = bar(1) as u64;
@@ -235,7 +242,7 @@ fn foo() {
     let b = a * 10;
     bar(a);
 }",
-            "
+            r"
 fn bar(a: usize): usize { a }
 fn foo() {
     <|>(bar(1) as u64) + 1;
@@ -255,7 +262,7 @@ fn foo() {
     fn test_inline_let_bind_block_expr() {
         check_assist(
             inline_local_variable,
-            "
+            r"
 fn foo() {
     let a<|> = { 10 + 1 };
     a + 1;
@@ -268,7 +275,7 @@ fn foo() {
     let b = a * 10;
     bar(a);
 }",
-            "
+            r"
 fn foo() {
     <|>{ 10 + 1 } + 1;
     if { 10 + 1 } > 10 {
@@ -287,7 +294,7 @@ fn foo() {
     fn test_inline_let_bind_paren_expr() {
         check_assist(
             inline_local_variable,
-            "
+            r"
 fn foo() {
     let a<|> = ( 10 + 1 );
     a + 1;
@@ -300,7 +307,7 @@ fn foo() {
     let b = a * 10;
     bar(a);
 }",
-            "
+            r"
 fn foo() {
     <|>( 10 + 1 ) + 1;
     if ( 10 + 1 ) > 10 {
@@ -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;
@@ -331,13 +339,13 @@ fn foo() {
     fn test_call_expr() {
         check_assist(
             inline_local_variable,
-            "
+            r"
 fn foo() {
     let a<|> = bar(10 + 1);
     let b = a * 10;
     let c = a as usize;
 }",
-            "
+            r"
 fn foo() {
     <|>let b = bar(10 + 1) * 10;
     let c = bar(10 + 1) as usize;
@@ -349,14 +357,14 @@ fn foo() {
     fn test_index_expr() {
         check_assist(
             inline_local_variable,
-            "
+            r"
 fn foo() {
     let x = vec![1, 2, 3];
     let a<|> = x[0];
     let b = a * 10;
     let c = a as usize;
 }",
-            "
+            r"
 fn foo() {
     let x = vec![1, 2, 3];
     <|>let b = x[0] * 10;
@@ -369,14 +377,14 @@ fn foo() {
     fn test_method_call_expr() {
         check_assist(
             inline_local_variable,
-            "
+            r"
 fn foo() {
     let bar = vec![1];
     let a<|> = bar.len();
     let b = a * 10;
     let c = a as usize;
 }",
-            "
+            r"
 fn foo() {
     let bar = vec![1];
     <|>let b = bar.len() * 10;
@@ -389,7 +397,7 @@ fn foo() {
     fn test_field_expr() {
         check_assist(
             inline_local_variable,
-            "
+            r"
 struct Bar {
     foo: usize
 }
@@ -400,7 +408,7 @@ fn foo() {
     let b = a * 10;
     let c = a as usize;
 }",
-            "
+            r"
 struct Bar {
     foo: usize
 }
@@ -417,7 +425,7 @@ fn foo() {
     fn test_try_expr() {
         check_assist(
             inline_local_variable,
-            "
+            r"
 fn foo() -> Option<usize> {
     let bar = Some(1);
     let a<|> = bar?;
@@ -425,7 +433,7 @@ fn foo() -> Option<usize> {
     let c = a as usize;
     None
 }",
-            "
+            r"
 fn foo() -> Option<usize> {
     let bar = Some(1);
     <|>let b = bar? * 10;
@@ -439,13 +447,13 @@ fn foo() -> Option<usize> {
     fn test_ref_expr() {
         check_assist(
             inline_local_variable,
-            "
+            r"
 fn foo() {
     let bar = 10;
     let a<|> = &bar;
     let b = a * 10;
 }",
-            "
+            r"
 fn foo() {
     let bar = 10;
     <|>let b = &bar * 10;
@@ -457,12 +465,12 @@ fn foo() {
     fn test_tuple_expr() {
         check_assist(
             inline_local_variable,
-            "
+            r"
 fn foo() {
     let a<|> = (10, 20);
     let b = a[0];
 }",
-            "
+            r"
 fn foo() {
     <|>let b = (10, 20)[0];
 }",
@@ -473,12 +481,12 @@ fn foo() {
     fn test_array_expr() {
         check_assist(
             inline_local_variable,
-            "
+            r"
 fn foo() {
     let a<|> = [1, 2, 3];
     let b = a.len();
 }",
-            "
+            r"
 fn foo() {
     <|>let b = [1, 2, 3].len();
 }",
@@ -489,13 +497,13 @@ fn foo() {
     fn test_paren() {
         check_assist(
             inline_local_variable,
-            "
+            r"
 fn foo() {
     let a<|> = (10 + 20);
     let b = a * 10;
     let c = a as usize;
 }",
-            "
+            r"
 fn foo() {
     <|>let b = (10 + 20) * 10;
     let c = (10 + 20) as usize;
@@ -507,14 +515,14 @@ fn foo() {
     fn test_path_expr() {
         check_assist(
             inline_local_variable,
-            "
+            r"
 fn foo() {
     let d = 10;
     let a<|> = d;
     let b = a * 10;
     let c = a as usize;
 }",
-            "
+            r"
 fn foo() {
     let d = 10;
     <|>let b = d * 10;
@@ -527,13 +535,13 @@ fn foo() {
     fn test_block_expr() {
         check_assist(
             inline_local_variable,
-            "
+            r"
 fn foo() {
     let a<|> = { 10 };
     let b = a * 10;
     let c = a as usize;
 }",
-            "
+            r"
 fn foo() {
     <|>let b = { 10 } * 10;
     let c = { 10 } as usize;
@@ -545,7 +553,7 @@ fn foo() {
     fn test_used_in_different_expr1() {
         check_assist(
             inline_local_variable,
-            "
+            r"
 fn foo() {
     let a<|> = 10 + 20;
     let b = a * 10;
@@ -553,7 +561,7 @@ fn foo() {
     let d = [a, 10];
     let e = (a);
 }",
-            "
+            r"
 fn foo() {
     <|>let b = (10 + 20) * 10;
     let c = (10 + 20, 20);
@@ -567,12 +575,12 @@ fn foo() {
     fn test_used_in_for_expr() {
         check_assist(
             inline_local_variable,
-            "
+            r"
 fn foo() {
     let a<|> = vec![10, 20];
     for i in a {}
 }",
-            "
+            r"
 fn foo() {
     <|>for i in vec![10, 20] {}
 }",
@@ -583,12 +591,12 @@ fn foo() {
     fn test_used_in_while_expr() {
         check_assist(
             inline_local_variable,
-            "
+            r"
 fn foo() {
     let a<|> = 1 > 0;
     while a {}
 }",
-            "
+            r"
 fn foo() {
     <|>while 1 > 0 {}
 }",
@@ -599,14 +607,14 @@ fn foo() {
     fn test_used_in_break_expr() {
         check_assist(
             inline_local_variable,
-            "
+            r"
 fn foo() {
     let a<|> = 1 + 1;
     loop {
         break a;
     }
 }",
-            "
+            r"
 fn foo() {
     <|>loop {
         break 1 + 1;
@@ -619,12 +627,12 @@ fn foo() {
     fn test_used_in_return_expr() {
         check_assist(
             inline_local_variable,
-            "
+            r"
 fn foo() {
     let a<|> = 1 > 0;
     return a;
 }",
-            "
+            r"
 fn foo() {
     <|>return 1 > 0;
 }",
@@ -635,12 +643,12 @@ fn foo() {
     fn test_used_in_match_expr() {
         check_assist(
             inline_local_variable,
-            "
+            r"
 fn foo() {
     let a<|> = 1 > 0;
     match a {}
 }",
-            "
+            r"
 fn foo() {
     <|>match 1 > 0 {}
 }",
@@ -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..50a15f978 100644
--- a/crates/ra_assists/src/lib.rs
+++ b/crates/ra_assists/src/lib.rs
@@ -178,19 +178,23 @@ 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_before: &str,
+        ra_fixture_after: &str,
+    ) {
+        check(assist, ra_fixture_before, ExpectedResult::After(ra_fixture_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
 );
diff --git a/crates/ra_ide/src/syntax_highlighting.rs b/crates/ra_ide/src/syntax_highlighting.rs
index 979a3f7a0..7e41db530 100644
--- a/crates/ra_ide/src/syntax_highlighting.rs
+++ b/crates/ra_ide/src/syntax_highlighting.rs
@@ -320,7 +320,7 @@ fn highlight_injection(
     let call_info = call_info_for_token(&sema, expanded)?;
     let idx = call_info.active_parameter?;
     let name = call_info.signature.parameter_names.get(idx)?;
-    if name != "ra_fixture" {
+    if !name.starts_with("ra_fixture") {
         return None;
     }
     let value = literal.value()?;