From e805e8c1d5bf26e9716fb855f97d950395129c20 Mon Sep 17 00:00:00 2001
From: Aleksey Kladov <aleksey.kladov@gmail.com>
Date: Mon, 29 Jun 2020 14:21:57 +0200
Subject: (T): make typification tests more data driven

---
 crates/ra_hir_ty/src/tests/never_type.rs | 118 ++++++++++++-------------------
 1 file changed, 46 insertions(+), 72 deletions(-)

(limited to 'crates/ra_hir_ty/src/tests/never_type.rs')

diff --git a/crates/ra_hir_ty/src/tests/never_type.rs b/crates/ra_hir_ty/src/tests/never_type.rs
index ab9a990f5..64d421d40 100644
--- a/crates/ra_hir_ty/src/tests/never_type.rs
+++ b/crates/ra_hir_ty/src/tests/never_type.rs
@@ -1,99 +1,91 @@
 use insta::assert_snapshot;
 
-use super::{infer_with_mismatches, type_at};
+use super::{check_types, infer_with_mismatches};
 
 #[test]
 fn infer_never1() {
-    let t = type_at(
+    check_types(
         r#"
-//- /main.rs
 fn test() {
     let t = return;
-    t<|>;
-}
+    t;
+} //^ !
 "#,
     );
-    assert_eq!(t, "!");
 }
 
 #[test]
 fn infer_never2() {
-    let t = type_at(
+    check_types(
         r#"
-//- /main.rs
 fn gen<T>() -> T { loop {} }
 
 fn test() {
     let a = gen();
     if false { a } else { loop {} };
-    a<|>;
-}
+    a;
+} //^ !
 "#,
     );
-    assert_eq!(t, "!");
 }
 
 #[test]
 fn infer_never3() {
-    let t = type_at(
+    check_types(
         r#"
-//- /main.rs
 fn gen<T>() -> T { loop {} }
 
 fn test() {
     let a = gen();
     if false { loop {} } else { a };
-    a<|>;
+    a;
+  //^ !
 }
 "#,
     );
-    assert_eq!(t, "!");
 }
 
 #[test]
 fn never_type_in_generic_args() {
-    let t = type_at(
+    check_types(
         r#"
-//- /main.rs
 enum Option<T> { None, Some(T) }
 
 fn test() {
     let a = if true { Option::None } else { Option::Some(return) };
-    a<|>;
-}
+    a;
+} //^ Option<!>
 "#,
     );
-    assert_eq!(t, "Option<!>");
 }
 
 #[test]
 fn never_type_can_be_reinferred1() {
-    let t = type_at(
+    check_types(
         r#"
-//- /main.rs
 fn gen<T>() -> T { loop {} }
 
 fn test() {
     let a = gen();
     if false { loop {} } else { a };
-    a<|>;
+    a;
+  //^ ()
     if false { a };
 }
 "#,
     );
-    assert_eq!(t, "()");
 }
 
 #[test]
 fn never_type_can_be_reinferred2() {
-    let t = type_at(
+    check_types(
         r#"
-//- /main.rs
 enum Option<T> { None, Some(T) }
 
 fn test() {
     let a = if true { Option::None } else { Option::Some(return) };
-    a<|>;
+    a;
+  //^ Option<i32>
     match 42 {
         42 => a,
         _ => Option::Some(42),
@@ -101,19 +93,18 @@ fn test() {
 }
 "#,
     );
-    assert_eq!(t, "Option<i32>");
 }
 
 #[test]
 fn never_type_can_be_reinferred3() {
-    let t = type_at(
+    check_types(
         r#"
-//- /main.rs
 enum Option<T> { None, Some(T) }
 
 fn test() {
     let a = if true { Option::None } else { Option::Some(return) };
-    a<|>;
+    a;
+  //^ Option<&str>
     match 42 {
         42 => a,
         _ => Option::Some("str"),
@@ -121,82 +112,72 @@ fn test() {
 }
 "#,
     );
-    assert_eq!(t, "Option<&str>");
 }
 
 #[test]
 fn match_no_arm() {
-    let t = type_at(
+    check_types(
         r#"
-//- /main.rs
 enum Void {}
 
 fn test(a: Void) {
     let t = match a {};
-    t<|>;
-}
+    t;
+} //^ !
 "#,
     );
-    assert_eq!(t, "!");
 }
 
 #[test]
 fn match_unknown_arm() {
-    let t = type_at(
+    check_types(
         r#"
-//- /main.rs
 fn test(a: Option) {
     let t = match 0 {
         _ => unknown,
     };
-    t<|>;
-}
+    t;
+} //^ {unknown}
 "#,
     );
-    assert_eq!(t, "{unknown}");
 }
 
 #[test]
 fn if_never() {
-    let t = type_at(
+    check_types(
         r#"
-//- /main.rs
 fn test() {
     let i = if true {
         loop {}
     } else {
         3.0
     };
-    i<|>;
-}
+    i;
+} //^ f64
 "#,
     );
-    assert_eq!(t, "f64");
 }
 
 #[test]
 fn if_else_never() {
-    let t = type_at(
+    check_types(
         r#"
-//- /main.rs
 fn test(input: bool) {
     let i = if input {
         2.0
     } else {
         return
     };
-    i<|>;
-}
+    i;
+} //^ f64
 "#,
     );
-    assert_eq!(t, "f64");
 }
 
 #[test]
 fn match_first_arm_never() {
-    let t = type_at(
+    check_types(
         r#"
-//- /main.rs
 fn test(a: i32) {
     let i = match a {
         1 => return,
@@ -204,18 +185,16 @@ fn test(a: i32) {
         3 => loop {},
         _ => 3.0,
     };
-    i<|>;
-}
+    i;
+} //^ f64
 "#,
     );
-    assert_eq!(t, "f64");
 }
 
 #[test]
 fn match_second_arm_never() {
-    let t = type_at(
+    check_types(
         r#"
-//- /main.rs
 fn test(a: i32) {
     let i = match a {
         1 => 3.0,
@@ -223,45 +202,40 @@ fn test(a: i32) {
         3 => 3.0,
         _ => return,
     };
-    i<|>;
-}
+    i;
+} //^ f64
 "#,
     );
-    assert_eq!(t, "f64");
 }
 
 #[test]
 fn match_all_arms_never() {
-    let t = type_at(
+    check_types(
         r#"
-//- /main.rs
 fn test(a: i32) {
     let i = match a {
         2 => return,
         _ => loop {},
     };
-    i<|>;
-}
+    i;
+} //^ !
 "#,
     );
-    assert_eq!(t, "!");
 }
 
 #[test]
 fn match_no_never_arms() {
-    let t = type_at(
+    check_types(
         r#"
-//- /main.rs
 fn test(a: i32) {
     let i = match a {
         2 => 2.0,
         _ => 3.0,
     };
-    i<|>;
-}
+    i;
+} //^ f64
 "#,
     );
-    assert_eq!(t, "f64");
 }
 
 #[test]
-- 
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