Add compiletest check tests

Author: Kobzol

src/bootstrap/src/core/build_steps/check.rs

@@ -440,6 +440,10 @@ impl Step for Compiletest {
         let _guard = builder.msg_check("compiletest artifacts", self.target, None);
         run_cargo(builder, cargo, builder.config.free_args.clone(), &stamp, vec![], true, false);
     }
+
+    fn metadata(&self) -> Option<StepMetadata> {
+        Some(StepMetadata::check("compiletest", self.target))
+    }
 }
 
 macro_rules! tool_check_step {

src/bootstrap/src/core/builder/tests.rs

@@ -1249,13 +1249,13 @@ mod snapshot {
             ctx.config("check")
                 .path("rustc")
                 .render_steps(), @r"
+        [check] std <host>
         [build] llvm <host>
-        [check] rustc 0 <host> -> rustc 1 <host>
+        [check] rustc <host>
         ");
     }
 
     #[test]
-    #[should_panic]
     fn check_compiler_stage_0() {
         let ctx = TestCtx::new();
         ctx.config("check").path("compiler").stage(0).run();
@@ -1307,7 +1307,6 @@ mod snapshot {
     }
 
     #[test]
-    #[should_panic]
     fn check_library_stage_0() {
         let ctx = TestCtx::new();
         ctx.config("check").path("library").stage(0).run();
@@ -1358,7 +1357,6 @@ mod snapshot {
     }
 
     #[test]
-    #[should_panic]
     fn check_miri_stage_0() {
         let ctx = TestCtx::new();
         ctx.config("check").path("miri").stage(0).run();
@@ -1398,6 +1396,30 @@ mod snapshot {
         ");
     }
 
+    #[test]
+    fn check_compiletest() {
+        let ctx = TestCtx::new();
+        insta::assert_snapshot!(
+            ctx.config("check")
+                .path("compiletest")
+                .render_steps(), @"[check] compiletest <host>");
+    }
+
+    #[test]
+    fn check_compiletest_stage1_libtest() {
+        let ctx = TestCtx::new();
+        insta::assert_snapshot!(
+            ctx.config("check")
+                .path("compiletest")
+                .args(&["--set", "build.compiletest-use-stage0-libtest=false"])
+                .render_steps(), @r"
+        [check] std <host>
+        [build] llvm <host>
+        [check] rustc <host>
+        [check] compiletest <host>
+        ");
+    }
+
     #[test]
     fn test_exclude() {
         let ctx = TestCtx::new();