Fix types (#194)

* run a typecheck as part of linting

* fix test issues

Author: koddsson

package.json

@@ -14,7 +14,8 @@
   },
   "scripts": {
     "build": "tsc",
-    "lint": "eslint src/**/*.ts",
+    "lint:types": "tsc --noEmit",
+    "lint": "eslint src/**/*.ts && npm run lint:types",
     "format": "npm run lint -- --fix",
     "test": "npm run format && web-test-runner",
     "test:watch": "npm run format && web-test-runner --watch",

tests/label-content-name-mismatch.test.ts

@@ -97,8 +97,7 @@ describe("label-content-name-mismatch", function () {
           <button aria-labelledby="label1">Find</button>
         </div>`,
       );
-      const button = container.querySelector('button');
-      const results = await scanner.scan(button);
+      const results = await scanner.scan(container);
 
       expect(results).to.have.lengthOf(1);
     });
@@ -110,8 +109,7 @@ describe("label-content-name-mismatch", function () {
           <button aria-labelledby="label2">Find</button>
         </div>`,
       );
-      const button = container.querySelector('button');
-      const results = await scanner.scan(button);
+      const results = await scanner.scan(container);
 
       expect(results).to.be.empty;
     });