test: update test for unused_variables

Author: Young-Flash

crates/ide-diagnostics/src/handlers/mutability_errors.rs

@@ -413,7 +413,7 @@ fn main() {
 fn main() {
     return;
     let mut x = 2;
-      //^^^^^ warn: unused variable
+      //^^^^^ 💡 warn: unused variable
     &mut x;
 }
 "#,
@@ -423,7 +423,7 @@ fn main() {
 fn main() {
     loop {}
     let mut x = 2;
-      //^^^^^ warn: unused variable
+      //^^^^^ 💡 warn: unused variable
     &mut x;
 }
 "#,
@@ -444,7 +444,7 @@ fn main(b: bool) {
         g();
     }
     let mut x = 2;
-      //^^^^^ warn: unused variable
+      //^^^^^ 💡 warn: unused variable
     &mut x;
 }
 "#,
@@ -459,7 +459,7 @@ fn main(b: bool) {
         return;
     }
     let mut x = 2;
-      //^^^^^ warn: unused variable
+      //^^^^^ 💡 warn: unused variable
     &mut x;
 }
 "#,
@@ -789,7 +789,7 @@ fn f() {
                //^^ 💡 error: cannot mutate immutable variable `x`
     _ = (x, y);
     let x = Foo;
-      //^ warn: unused variable
+      //^ 💡 warn: unused variable
     let x = Foo;
     let y: &mut (i32, u8) = &mut x;
                           //^^^^^^ 💡 error: cannot mutate immutable variable `x`

crates/ide-diagnostics/src/handlers/unused_variables.rs

@@ -47,7 +47,7 @@ fn fixes(var_name: &String, diagnostic_range: FileRange, is_in_marco: bool) -> O
 
 #[cfg(test)]
 mod tests {
-    use crate::tests::check_diagnostics;
+    use crate::tests::{check_diagnostics, check_fix, check_no_fix};
 
     #[test]
     fn unused_variables_simple() {
@@ -57,31 +57,31 @@ mod tests {
 struct Foo { f1: i32, f2: i64 }
 
 fn f(kkk: i32) {}
-   //^^^ warn: unused variable
+   //^^^ 💡 warn: unused variable
 fn main() {
     let a = 2;
-      //^ warn: unused variable
+      //^ 💡 warn: unused variable
     let b = 5;
     // note: `unused variable` implies `unused mut`, so we should not emit both at the same time.
     let mut c = f(b);
-      //^^^^^ warn: unused variable
+      //^^^^^ 💡 warn: unused variable
     let (d, e) = (3, 5);
-       //^ warn: unused variable
+       //^ 💡 warn: unused variable
     let _ = e;
     let f1 = 2;
     let f2 = 5;
     let f = Foo { f1, f2 };
     match f {
         Foo { f1, f2 } => {
-            //^^ warn: unused variable
+            //^^ 💡 warn: unused variable
             _ = f2;
         }
     }
     let g = false;
     if g {}
     let h: fn() -> i32 = || 2;
     let i = h();
-      //^ warn: unused variable
+      //^ 💡 warn: unused variable
 }
 "#,
         );
@@ -95,11 +95,11 @@ struct S {
 }
 impl S {
     fn owned_self(self, u: i32) {}
-                      //^ warn: unused variable
+                      //^ 💡 warn: unused variable
     fn ref_self(&self, u: i32) {}
-                     //^ warn: unused variable
+                     //^ 💡 warn: unused variable
     fn ref_mut_self(&mut self, u: i32) {}
-                             //^ warn: unused variable
+                             //^ 💡 warn: unused variable
     fn owned_mut_self(mut self) {}
                     //^^^^^^^^ 💡 warn: variable does not need to be mutable
 
@@ -131,7 +131,78 @@ fn main() {
 #[deny(unused)]
 fn main2() {
     let x = 2;
-      //^ error: unused variable
+      //^ 💡 error: unused variable
+}
+"#,
+        );
+    }
+
+    #[test]
+    fn fix_unused_variable() {
+        check_fix(
+            r#"
+fn main() {
+    let x$0 = 2;
+}
+"#,
+            r#"
+fn main() {
+    let _x = 2;
+}
+"#,
+        );
+
+        check_fix(
+            r#"
+fn main() {
+    let ($0d, _e) = (3, 5);
+}
+"#,
+            r#"
+fn main() {
+    let (_d, _e) = (3, 5);
+}
+"#,
+        );
+
+        check_fix(
+            r#"
+struct Foo { f1: i32, f2: i64 }
+fn main() {
+    let f = Foo { f1: 0, f2: 0 };
+    match f {
+        Foo { f1$0, f2 } => {
+            _ = f2;
+        }
+    }
+}
+"#,
+            r#"
+struct Foo { f1: i32, f2: i64 }
+fn main() {
+    let f = Foo { f1: 0, f2: 0 };
+    match f {
+        Foo { _f1, f2 } => {
+            _ = f2;
+        }
+    }
+}
+"#,
+        );
+    }
+
+    #[test]
+    fn no_fix_for_marco() {
+        check_no_fix(
+            r#"
+macro_rules! my_macro {
+    () => {
+        let x = 3;
+    };
+}
+
+fn main() {
+    $0my_macro!();
 }
 "#,
         );