fix: mime-score logic for mp4 types (#140)

Author: broofa

mimeScore.js

@@ -25,6 +25,11 @@ var TYPE_SCORES = {
   // prefer font/woff over application/font-woff
   font: 2,
 
+  // prefer video/mp4 over audio/mp4 over application/mp4
+  // See https://www.rfc-editor.org/rfc/rfc4337.html#section-2
+  audio: 2,
+  video: 3,
+
   default: 0
 }
 

test/test.js

@@ -158,6 +158,10 @@ describe('mimeTypes', function () {
       assert.strictEqual(mimeTypes.lookup('.xml'), 'application/xml')
     })
 
+    it('should return mime type for ".mp4"', function () {
+      assert.strictEqual(mimeTypes.lookup('.mp4'), 'video/mp4')
+    })
+
     it('should work without the leading dot', function () {
       assert.strictEqual(mimeTypes.lookup('html'), 'text/html')
       assert.strictEqual(mimeTypes.lookup('xml'), 'application/xml')