Revert "remove test for removed feature"

This reverts commit b0c38f2.

Author: benmccann

packages/kit/test/apps/basics/src/routes/no-router/__layout.svelte

@@ -0,0 +1,12 @@
+<script>
+	let n = 0;
+</script>
+
+<button on:click={() => n += 1}>
+	clicks: {n}
+</button>
+
+<a href="/no-router/a">a</a>
+<a href="/no-router/b">b</a>
+
+<slot></slot>

packages/kit/test/apps/basics/src/routes/no-router/a.svelte

@@ -0,0 +1,5 @@
+<script context="module">
+	export const router = false;
+</script>
+
+<h1>a</h1>

packages/kit/test/apps/basics/src/routes/no-router/b.svelte

@@ -0,0 +1 @@
+<h1>b</h1>

packages/kit/test/apps/basics/test/test.js

@@ -1140,6 +1140,27 @@ test.describe.parallel('Page options', () => {
 		}
 	});
 
+	test('disables router if router=false', async ({ page, clicknav, javaScriptEnabled }) => {
+		await page.goto('/no-router/a');
+
+		if (javaScriptEnabled) {
+			await page.click('button');
+			expect(await page.textContent('button')).toBe('clicks: 1');
+
+			await Promise.all([page.click('[href="/no-router/b"]'), page.waitForNavigation()]);
+			expect(await page.textContent('button')).toBe('clicks: 0');
+
+			await page.click('button');
+			expect(await page.textContent('button')).toBe('clicks: 1');
+
+			await clicknav('[href="/no-router/a"]');
+			expect(await page.textContent('button')).toBe('clicks: 1');
+
+			await Promise.all([page.click('[href="/no-router/b"]'), page.waitForNavigation()]);
+			expect(await page.textContent('button')).toBe('clicks: 0');
+		}
+	});
+
 	test('does not SSR page with ssr=false', async ({ page, javaScriptEnabled }) => {
 		await page.goto('/no-ssr');