Use separate tsconfig.json project, like the ember.js projcet does

files/__addonLocation__/package.json

@@ -25,6 +25,7 @@
     "lint:hbs:fix": "ember-template-lint . --fix --no-error-on-unmatched-pattern",
     "lint:js:fix": "eslint . --fix",<% if (typescript) { %>
     "lint:types": "glint",
+    "lint:types-tests": "glint --project type-tests",
     "start": "concurrently 'npm:start:*'",
     "start:js": "rollup --config --watch --no-watch.clearScreen",
     "start:types": "glint --declaration --watch",<% } else { %>

files/__addonLocation__/tsconfig.json

@@ -2,13 +2,12 @@
   "extends": "@tsconfig/ember/tsconfig.json",
   "include": [
     "src/**/*",
-    "unpublished-development-types/**/*",
-    "type-tests/**/*"
+    "unpublished-development-types/**/*"
   ],
   "glint": {
     "environment": "ember-loose"
   },
   "compilerOptions": {
-    "declarationDir": "declarations"
+    "declarationDir": "declarations",
   }
 }

files/__addonLocation__/type-tests/tsconfig.json

@@ -0,0 +1,3 @@
+{
+  "extends": "@tsconfig/ember/tsconfig.json"
+}

tests/smoke-tests/--typescript.test.ts

@@ -71,20 +71,14 @@ for (let packageManager of SUPPORTED_PACKAGE_MANAGERS) {
         'unpublished-development-types',
       ]);
 
-      await matchesFixture(path.join(typeTests, 'index.test.ts'), {
-        cwd,
-        scenario: 'addon-only-ts',
-        file: 'type-tests/index.test.ts',
-      });
+      expect(await dirContents(typeTests)).to.deep.equal(['index.test.ts', 'tsconfig.json']);
     });
 
     it('builds the addon', async () => {
       let { exitCode } = await runScript({ cwd, script: 'build', packageManager: 'pnpm' });
 
       expect(exitCode).toEqual(0);
 
-      console.log({ distDir, declarationsDir });
-
       let distContents = await dirContents(distDir);
       let declarationsContents = await dirContents(declarationsDir);