test: added e2e test for ipx with dir config

Author: wuiyang

playground/providers.ts

@@ -58,6 +58,20 @@ export const providers: Provider[] = [
         height: 300,
         link: 'https://unsplash.com/@jeremythomasphoto?utm_source=unsplash&utm_medium=referral&utm_content=creditCopyText',
       },
+      {
+        src: '/images/colors-layer.jpg',
+        from: 'Jeremy Thomas',
+        width: 300,
+        height: 300,
+        link: 'https://unsplash.com/@jeremythomasphoto?utm_source=unsplash&utm_medium=referral&utm_content=creditCopyText',
+      },
+      {
+        src: '/images/colors-layer-config.jpg',
+        from: 'Jeremy Thomas',
+        width: 300,
+        height: 300,
+        link: 'https://unsplash.com/@jeremythomasphoto?utm_source=unsplash&utm_medium=referral&utm_content=creditCopyText',
+      },
       {
         src: '/images/everest.jpg',
         from: 'Mount Everest Wikipedia page (alias)',

test/e2e/__snapshots__/ipx.json5

@@ -1,12 +1,16 @@
 {
   "requests": [
+    "/_ipx/s_300x300/images/colors-layer-config.jpg",
+    "/_ipx/s_300x300/images/colors-layer.jpg",
     "/_ipx/s_300x300/images/colors.jpg",
     "/_ipx/s_300x300/images/everest.jpg",
     "/_ipx/s_300x300/images/tacos.svg",
     "/_ipx/s_300x300/unsplash/photo-1606112219348-204d7d8b94ee",
   ],
   "sources": [
     "/_ipx/s_300x300/images/colors.jpg",
+    "/_ipx/s_300x300/images/colors-layer.jpg",
+    "/_ipx/s_300x300/images/colors-layer-config.jpg",
     "/_ipx/s_300x300/images/everest.jpg",
     "/_ipx/s_300x300/images/tacos.svg",
     "/_ipx/s_300x300/unsplash/photo-1606112219348-204d7d8b94ee",

test/e2e/generate.test.ts

@@ -35,10 +35,14 @@ describe('ipx provider', () => {
     expect(files.sort()).toMatchInlineSnapshot(`
       [
         "_ipx/_/images/nuxt.png",
+        "_ipx/s_300x300/images/colors-layer-config.jpg",
+        "_ipx/s_300x300/images/colors-layer.jpg",
         "_ipx/s_300x300/images/colors.jpg",
         "_ipx/s_300x300/images/everest.jpg",
         "_ipx/s_300x300/images/tacos.svg",
         "_ipx/s_300x300/unsplash/photo-1606112219348-204d7d8b94ee",
+        "_ipx/s_600x600/images/colors-layer-config.jpg",
+        "_ipx/s_600x600/images/colors-layer.jpg",
         "_ipx/s_600x600/images/colors.jpg",
         "_ipx/s_600x600/images/everest.jpg",
         "_ipx/s_600x600/images/tacos.svg",