Add favicon assets

go.mod

@@ -2,4 +2,4 @@ module github.com/google/docsy-example
 
 go 1.12
 
-require github.com/google/docsy/theme v0.0.0-20260612162003-f22a352d4262 // indirect
+require github.com/google/docsy/theme v0.0.0-20260614124843-f516706840c3 // indirect

go.sum

@@ -1,6 +1,6 @@
 github.com/FortAwesome/Font-Awesome v0.0.0-20241216213156-af620534bfc3 h1:/iluJkJiyTAdnqrw3Yi9rH2HNHhrrtCmj8VJe7I6o3w=
 github.com/FortAwesome/Font-Awesome v0.0.0-20241216213156-af620534bfc3/go.mod h1:IUgezN/MFpCDIlFezw3L8j83oeiIuYoj28Miwr/KUYo=
-github.com/google/docsy/theme v0.0.0-20260612162003-f22a352d4262 h1:DGXSMc4p24g6M1S4cQ43pRdHfUGdlMRjlraSijTABcw=
-github.com/google/docsy/theme v0.0.0-20260612162003-f22a352d4262/go.mod h1:CGCFFJjc3PAYexPDsQqTbB3/lWnncwlwKLnSQkDaaF0=
+github.com/google/docsy/theme v0.0.0-20260614124843-f516706840c3 h1:5iDfW1iwC8gZ3caayHWOyukUG4C7MLb1aL1l+vBP2yc=
+github.com/google/docsy/theme v0.0.0-20260614124843-f516706840c3/go.mod h1:CGCFFJjc3PAYexPDsQqTbB3/lWnncwlwKLnSQkDaaF0=
 github.com/twbs/bootstrap v5.3.8+incompatible h1:eK1fsXP7R/FWFt+sSNmmvUH9usPocf240nWVw7Dh02o=
 github.com/twbs/bootstrap v5.3.8+incompatible/go.mod h1:fZTSrkpSf0/HkL0IIJzvVspTt1r9zuf7XlZau8kpcY0=

tests/favicons.test.mjs

@@ -0,0 +1,38 @@
+import test from 'node:test';
+import assert from 'node:assert/strict';
+import { readFileSync } from 'node:fs';
+import { fileURLToPath } from 'node:url';
+
+// Verifies that the Docsy theme's default favicons partial discovers and links
+// the icon files this site ships in `static/`. Assumes the site has been built
+// (`npm run build`); in the `test-only` chain, the check:links prebuild takes
+// care of that.
+
+const home = readFileSync(
+  fileURLToPath(new URL('../public/index.html', import.meta.url)),
+  'utf8',
+);
+
+function head(html) {
+  return html.match(/<head[^>]*>([\s\S]*?)<\/head>/i)?.[1] ?? '';
+}
+
+test('the home page links the favicons supplied in static/', (t) => {
+  const h = head(home);
+  assert.match(
+    h,
+    /<link rel="icon" href="\/favicon\.ico" sizes="16x16 32x32 48x48" \/>/,
+    'links favicon.ico',
+  );
+  assert.match(
+    h,
+    /<link rel="icon" href="\/favicon\.svg" type="image\/svg\+xml" \/>/,
+    'links favicon.svg',
+  );
+  assert.match(
+    h,
+    /<link rel="apple-touch-icon" href="\/apple-touch-icon\.png" \/>/,
+    'links apple-touch-icon.png',
+  );
+  t.diagnostic('all three discovered favicon links present');
+});