Use expect-type

Author: NullVoxPopuli

package.json

@@ -78,6 +78,7 @@
     "eslint-plugin-node": "^11.1.0",
     "eslint-plugin-prettier": "^4.0.0",
     "eslint-plugin-qunit": "^7.3.4",
+    "expect-type": "^0.15.0",
     "loader.js": "^4.7.0",
     "npm-run-all": "^4.1.5",
     "prettier": "^2.6.0",

type-tests/the-tests.ts

@@ -8,44 +8,53 @@ import {
   w,
 } from '@ember/string';
 
+import { expectTypeOf } from 'expect-type';
+
 // @ts-expect-error
 dasherize();
-dasherize('blue man group'); // $ExpectType string
 // @ts-expect-error
 dasherize('', '');
 
+expectTypeOf(dasherize('blue man group')).toBeString()
+
 // @ts-expect-error
 camelize();
-camelize('blue man group'); // $ExpectType string
 // @ts-expect-error
 camelize('', '');
 
+expectTypeOf(camelize('blue man group')).toBeString();
+
 // @ts-expect-error
 decamelize();
-decamelize('blue man group'); // $ExpectType string
 // @ts-expect-error
 decamelize('', '');
 
+expectTypeOf(decamelize('blue man group')).toBeString();
+
 // @ts-expect-error
 underscore();
-underscore('blue man group'); // $ExpectType string
 // @ts-expect-error
 underscore('', '');
 
+expectTypeOf(underscore('blue man group')).toBeString();
+
 // @ts-expect-error
 w();
-w('blue man group'); // $ExpectType string[]
 // @ts-expect-error
 w('', '');
 
+expectTypeOf(w('blue man group')).toMatchTypeOf<string[]>();
+
 // @ts-expect-error
 classify();
-classify('blue man group'); // $ExpectType string
 // @ts-expect-error
 classify('', '');
 
+expectTypeOf(classify('blue man group')).toBeString();
+
 // @ts-expect-error
 capitalize();
-capitalize('blue man group'); // $ExpectType string
 // @ts-expect-error
 capitalize('', '');
+
+expectTypeOf(capitalize('blue man group')).toBeString();

yarn.lock

@@ -6365,6 +6365,11 @@ expand-tilde@^2.0.0, expand-tilde@^2.0.2:
   dependencies:
     homedir-polyfill "^1.0.1"
 
+expect-type@^0.15.0:
+  version "0.15.0"
+  resolved "https://registry.yarnpkg.com/expect-type/-/expect-type-0.15.0.tgz#89f75e22c88554844ea2b2faf4ef5fc2e579d3b5"
+  integrity sha512-yWnriYB4e8G54M5/fAFj7rCIBiKs1HAACaY13kCz6Ku0dezjS9aMcfcdVK2X8Tv2tEV1BPz/wKfQ7WA4S/d8aA==
+
 express@^4.10.7, express@^4.17.1:
   version "4.18.2"
   resolved "https://registry.yarnpkg.com/express/-/express-4.18.2.tgz#3fabe08296e930c796c19e3c516979386ba9fd59"