Files app: Fixes icons for files shown in Audio folder

Adds .opus as a know extension for OGG files. Browser would return
*.opus files as recent audio files, but file manager would not
set the correct icon on them.

Bug: 1067093
Change-Id: Ie14f06245004f96e6e86ba61353d0a3d7b584d09
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2215389
Commit-Queue: Bo Majewski <majewski@chromium.org>
Reviewed-by: Alex Danilo <adanilo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#772148}

ui/file_manager/file_manager/common/js/file_type.js

@@ -225,7 +225,7 @@ FileType.types = [
     type: 'audio',
     name: 'AUDIO_FILE_TYPE',
     subtype: 'OGG',
-    pattern: /\.og(a|g)$/i,
+    pattern: /\.o(g(a|g)|pus)$/i,
     mimePattern: /audio\/ogg/i
   },
   {

ui/file_manager/file_manager/common/js/file_type_unittest.js

@@ -37,3 +37,31 @@ function testDownloadsIcon() {
   assertEquals('folder', FileType.getIcon(downloads, mimetype, driveRoot));
   assertEquals('folder', FileType.getIcon(downloads, mimetype, androidRoot));
 }
+
+function testGetTypeForName() {
+  const testItems = [
+    // Simple cases: file name only.
+    {name: '/foo.amr', want: {type: 'audio', subtype: 'AMR'}},
+    {name: '/foo.flac', want: {type: 'audio', subtype: 'FLAC'}},
+    {name: '/foo.mp3', want: {type: 'audio', subtype: 'MP3'}},
+    {name: '/foo.m4a', want: {type: 'audio', subtype: 'MPEG'}},
+    {name: '/foo.oga', want: {type: 'audio', subtype: 'OGG'}},
+    {name: '/foo.ogg', want: {type: 'audio', subtype: 'OGG'}},
+    {name: '/foo.opus', want: {type: 'audio', subtype: 'OGG'}},
+    {name: '/foo.wav', want: {type: 'audio', subtype: 'WAV'}},
+    // Complex cases, directory and file name.
+    {name: '/dir.mp3/foo.amr', want: {type: 'audio', subtype: 'AMR'}},
+    {name: '/dir.ogg/foo.flac', want: {type: 'audio', subtype: 'FLAC'}},
+    {name: '/dir/flac/foo.mp3', want: {type: 'audio', subtype: 'MP3'}},
+    {name: '/dir_amr/foo.m4a', want: {type: 'audio', subtype: 'MPEG'}},
+    {name: '/amr/foo.oga', want: {type: 'audio', subtype: 'OGG'}},
+    {name: '/wav/dir/foo.ogg', want: {type: 'audio', subtype: 'OGG'}},
+    {name: '/mp3/amr/foo.opus', want: {type: 'audio', subtype: 'OGG'}},
+    {name: '/dir/foo.wav', want: {type: 'audio', subtype: 'WAV'}},
+  ];
+  for (const item of testItems) {
+    const got = FileType.getTypeForName(item.name);
+    assertEquals(item.want.type, got.type);
+    assertEquals(item.want.subtype, got.subtype);
+  }
+}