Combine tests, since it was 99% duplication

tests/default.test.mjs

@@ -10,18 +10,24 @@ const blueprintPath = join(__dirname, '..');
 const appName = 'fancy-app-in-test';
 
 const FLAG_SETS = [
-  [
-    /* none, default */
-  ],
-  ['--typescript'],
+  {
+    flags: [
+      /* none, default */
+    ],
+    fixturePath: join(__dirname, 'fixture'),
+  },
+  {
+    flags: ['--typescript'],
+    fixturePath: join(__dirname, 'fixture-ts'),
+  },
 ];
 
 describe('basic functionality', function () {
   let tmpDir;
   let emberCli = `[email protected]`;
 
-  for (let flagSet of FLAG_SETS) {
-    describe(`with flags: '${flagSet.join(' ')}'`, function () {
+  for (let { flags, fixturePath } of FLAG_SETS) {
+    describe(`with flags: '${flags.join(' ')}'`, function () {
       beforeAll(async () => {
         tmpDir = await tmp.dir({ unsafeCleanup: true });
 
@@ -33,6 +39,7 @@ describe('basic functionality', function () {
           blueprintPath,
           '--pnpm',
           '--skip-git',
+          ...flags,
         ];
 
         await execa('npx', emberCliArgs, {
@@ -41,13 +48,9 @@ describe('basic functionality', function () {
         });
 
         // apply the fixture on top of the generated app
-        copyWithTemplate(
-          join(__dirname, 'fixture'),
-          join(tmpDir.path, appName),
-          {
-            name: appName,
-          },
-        );
+        copyWithTemplate(fixturePath, join(tmpDir.path, appName), {
+          name: appName,
+        });
 
         // Sync the lints for the fixtures with the project's config
         await execa(`pnpm`, ['lint:fix'], {