fix: ensure isolated testing of create-svelte with local packages

.gitignore

@@ -15,3 +15,4 @@ yarn.lock
 .netlify
 .turbo
 .vercel
+.test-tmp

packages/create-svelte/test/check.js

@@ -1,30 +1,81 @@
 import fs from 'fs';
 import { execSync } from 'child_process';
+import path from 'path';
 import { test } from 'uvu';
 import { create } from '../index.js';
+import { fileURLToPath } from 'url';
+// use a directory outside of packages to ensure it isn't added to the pnpm workspace
+const test_workspace_dir = fileURLToPath(
+	new URL('../../../.test-tmp/create-svelte/', import.meta.url)
+);
+const overrides = {};
+['kit', 'adapter-auto', 'adapter-cloudflare', 'adapter-netlify', 'adapter-vercel'].forEach(
+	(pkg) => {
+		overrides[`@sveltejs/${pkg}`] = `${path.resolve(
+			test_workspace_dir,
+			'..',
+			'..',
+			'packages',
+			pkg
+		)}`; //'workspace:*';
+	}
+);
+test.before(() => {
+	try {
+		// prepare test pnpm workspace
+		fs.rmSync(test_workspace_dir, { recursive: true, force: true });
+		fs.mkdirSync(test_workspace_dir, { recursive: true });
+		const workspace = {
+			name: 'svelte-check-test-fake-pnpm-workspace',
+			private: true,
+			version: '0.0.0',
+			pnpm: { overrides },
+			devDependencies: overrides
+		};
+		fs.writeFileSync(
+			path.join(test_workspace_dir, 'package.json'),
+			JSON.stringify(workspace, null, '\t')
+		);
+		fs.writeFileSync(path.join(test_workspace_dir, 'pnpm-workspace.yaml'), 'packages:\n  - ./*\n');
 
-const dir = '.test-tmp';
-
-test.after(() => {
-	fs.rmSync(dir, { recursive: true, force: true });
+		// force creation of pnpm-lock.yaml in test workspace
+		execSync('pnpm install --no-frozen-lockfile', { dir: test_workspace_dir, stdio: 'inherit' });
+	} catch (e) {
+		console.error('failed to setup create-svelte test workspace', e);
+		throw e;
+	}
 });
 
 for (const template of fs.readdirSync('templates')) {
 	for (const types of ['checkjs', 'typescript']) {
 		test(`${template}: ${types}`, () => {
-			const cwd = `${dir}/${template}-${types}`;
+			const cwd = path.join(test_workspace_dir, `${template}-${types}`);
 			fs.rmSync(cwd, { recursive: true, force: true });
 
 			create(cwd, {
-				name: 'test',
+				name: `create-svelte-test-${template}-${types}`,
 				template,
 				types,
 				prettier: false,
 				eslint: false,
 				playwright: false
 			});
+			const pkg = JSON.parse(fs.readFileSync(path.join(cwd, 'package.json'), 'utf-8'));
+			Object.entries(overrides).forEach(([key, value]) => {
+				if (pkg.devDependencies?.[key]) {
+					pkg.devDependencies[key] = value;
+				}
+				if (pkg.dependencies?.[key]) {
+					pkg.dependencies[key] = value;
+				}
+			});
+			fs.writeFileSync(path.join(cwd, 'package.json'), JSON.stringify(pkg, null, '\t'));
+
+			// this pnpm install works in the test workspace, which redirects to our local packages again
+			execSync('pnpm install --no-frozen-lockfile', { cwd, stdio: 'inherit' });
 
-			execSync('pnpm i --no-frozen-lockfile && pnpm check', { cwd, stdio: 'inherit' });
+			// run check command separately
+			execSync('pnpm check', { cwd, stdio: 'inherit' });
 		});
 	}
 }

pnpm-workspace.yaml

@@ -5,4 +5,4 @@ packages:
   - 'packages/kit/test/apps/*'
   - 'packages/kit/test/prerendering/*'
   - 'packages/create-svelte/templates/*'
-  - 'packages/create-svelte/.test-tmp/*'
+  - '!.test-tmp/**'