From 25809ec409c99f0748747ec149f958265c02509d Mon Sep 17 00:00:00 2001
From: Rich-Harris <richard.a.harris@gmail.com>
Date: Sun, 25 Mar 2018 15:12:35 -0400
Subject: [PATCH] enforce stable sort

---
 src/core/create_routes.ts       |  5 +++-
 test/unit/create_routes.test.js | 43 +++++++++++++++++++++++++++++++--
 2 files changed, 45 insertions(+), 3 deletions(-)

diff --git a/src/core/create_routes.ts b/src/core/create_routes.ts
index 133b865..3888b87 100644
--- a/src/core/create_routes.ts
+++ b/src/core/create_routes.ts
@@ -102,7 +102,10 @@ export default function create_routes({ files } = { files: glob.sync('**/*.*', {
 					}
 
 					if (!a_sub_part.dynamic && a_sub_part.content !== b_sub_part.content) {
-						return b_sub_part.content.length - a_sub_part.content.length;
+						return (
+							(b_sub_part.content.length - a_sub_part.content.length) ||
+							(a_sub_part.content < b_sub_part.content ? -1 : 1)
+						);
 					}
 				}
 			}
diff --git a/test/unit/create_routes.test.js b/test/unit/create_routes.test.js
index 02d4c15..5b70ffe 100644
--- a/test/unit/create_routes.test.js
+++ b/test/unit/create_routes.test.js
@@ -12,8 +12,8 @@ describe('create_routes', () => {
 			[
 				'index.html',
 				'about.html',
-				'post/foo.html',
 				'post/bar.html',
+				'post/foo.html',
 				'post/f[xx].html',
 				'post/[id].json.js',
 				'post/[id].html',
@@ -23,7 +23,7 @@ describe('create_routes', () => {
 	});
 
 	it('prefers index page to nested route', () => {
-		const routes = create_routes({
+		let routes = create_routes({
 			files: [
 				'api/examples/[slug].js',
 				'api/examples/index.js',
@@ -55,6 +55,45 @@ describe('create_routes', () => {
 				'api/gists/[id].js',
 			]
 		);
+
+		routes = create_routes({
+			files: [
+				'4xx.html',
+				'5xx.html',
+				'api/blog/[slug].js',
+				'api/blog/index.js',
+				'api/guide/contents.js',
+				'api/guide/index.js',
+				'blog/[slug].html',
+				'blog/index.html',
+				'blog/rss.xml.js',
+				'gist/[id].js',
+				'gist/create.js',
+				'guide/index.html',
+				'index.html',
+				'repl/index.html'
+			]
+		});
+
+		assert.deepEqual(
+			routes.map(r => r.file),
+			[
+				'4xx.html',
+				'5xx.html',
+				'index.html',
+				'guide/index.html',
+				'blog/index.html',
+				'blog/rss.xml.js',
+				'blog/[slug].html',
+				'gist/create.js',
+				'gist/[id].js',
+				'repl/index.html',
+				'api/guide/index.js',
+				'api/guide/contents.js',
+				'api/blog/index.js',
+				'api/blog/[slug].js',
+			]
+		);
 	});
 
 	it('generates params', () => {