internal: Implement module_path macro

crates/ide/src/hover/tests.rs

@@ -8702,3 +8702,68 @@ fn foo() {
         "#]],
     );
 }
+
+#[test]
+fn module_path_macro() {
+    check(
+        r##"
+//- minicore: module_path
+
+const C$0: &'static str = module_path!();
+"##,
+        expect![[r#"
+            *C*
+
+            ```rust
+            test
+            ```
+
+            ```rust
+            const C: &'static str = "test"
+            ```
+        "#]],
+    );
+    check(
+        r##"
+//- minicore: module_path
+
+mod foo {
+    const C$0: &'static str = module_path!();
+}
+"##,
+        expect![[r#"
+            *C*
+
+            ```rust
+            test::foo
+            ```
+
+            ```rust
+            const C: &'static str = "test::foo"
+            ```
+        "#]],
+    );
+    check(
+        r##"
+//- minicore: module_path
+mod baz {
+    const _: () = {
+        mod bar {
+            const C$0: &'static str = module_path!();
+        }
+    }
+}
+"##,
+        expect![[r#"
+            *C*
+
+            ```rust
+            test::bar
+            ```
+
+            ```rust
+            const C: &'static str = "test::baz::bar"
+            ```
+        "#]],
+    );
+}