Add the ability to generate a mime type of a specific media type

CONTRIBUTING.md

@@ -50,7 +50,7 @@ Include [YARD] style docs for all methods that includes:
 - The return type (`@return`)
 - At least one example of the output (`@example`)
 - The version that the method was added (`@faker.version`)
-  - Set as `next` for new methods
+  - Set as `next` for new methods or methods with new features 
 
 ```ruby
 ##

doc/default/file.md

@@ -5,7 +5,9 @@ Available since version 1.6.4.
 ```ruby
 Faker::File.extension #=> "mp3"
 
+# Keyword arguments: media_type
 Faker::File.mime_type #=> "application/pdf"
+Faker::File.mime_type(media_type: 'image') #=> "image/png"
 
 # Keyword arguments: dir, name, extension, directory_separator
 Faker::File.file_name(dir: 'path/to') #=> "path/to/something_random.jpg"

lib/faker/default/file.rb

@@ -57,9 +57,9 @@ def extension
       # @example
       #   Faker::File.mime_type #=> "application/pdf"
       #
-      # @faker.version 1.6.4
-      def mime_type
-        fetch('file.mime_type')
+      # @faker.version next
+      def mime_type(media_type: nil)
+        media_type ? fetch("file.mime_type.#{media_type}") : sample(sample(translate('faker.file.mime_type').values))
       end
 
       # rubocop:disable Metrics/ParameterLists

lib/locales/en/file.yml

@@ -2,4 +2,12 @@ en:
   faker:
     file:
       extension: ["flac", "mp3", "wav", "bmp", "gif", "jpeg", "jpg", "png", "tiff", "css", "csv", "html", "js", "json", "txt", "mp4", "avi", "mov", "webm", "doc", "docx", "xls", "xlsx", "ppt", "pptx", "odt", "ods", "odp", "pages", "numbers", "key", "pdf"]
-      mime_type: ["application/atom+xml", "application/ecmascript", "application/EDI-X12", "application/EDIFACT", "application/json", "application/javascript", "application/ogg", "application/pdf", "application/postscript", "application/rdf+xml", "application/rss+xml", "application/soap+xml", "application/font-woff", "application/xhtml+xml", "application/xml-dtd", "application/xop+xml", "application/zip", "application/gzip", "audio/basic", "audio/L24", "audio/mp4", "audio/mpeg", "audio/ogg", "audio/vorbis", "audio/vnd.rn-realaudio", "audio/vnd.wave", "audio/webm", "image/gif", "image/jpeg", "image/pjpeg", "image/png", "image/svg+xml", "image/tiff", "image/vnd.microsoft.icon", "message/http", "message/imdn+xml", "message/partial", "message/rfc822", "model/example", "model/iges", "model/mesh", "model/vrml", "model/x3d+binary", "model/x3d+vrml", "model/x3d+xml", "multipart/mixed", "multipart/alternative", "multipart/related", "multipart/form-data", "multipart/signed", "multipart/encrypted", "text/cmd", "text/css", "text/csv", "text/html", "text/javascript", "text/plain", "text/vcard", "text/xml", "video/mpeg", "video/mp4", "video/ogg", "video/quicktime", "video/webm", "video/x-matroska", "video/x-ms-wmv", "video/x-flv"]
+      mime_type:
+        application: ["application/atom+xml", "application/ecmascript", "application/EDI-X12", "application/EDIFACT", "application/json", "application/javascript", "application/ogg", "application/pdf", "application/postscript", "application/rdf+xml", "application/rss+xml", "application/soap+xml", "application/font-woff", "application/xhtml+xml", "application/xml-dtd", "application/xop+xml", "application/zip", "application/gzip"]
+        audio: ["audio/basic", "audio/L24", "audio/mp4", "audio/mpeg", "audio/ogg", "audio/vorbis", "audio/vnd.rn-realaudio", "audio/vnd.wave", "audio/webm"]
+        image: ["image/gif", "image/jpeg", "image/pjpeg", "image/png", "image/svg+xml", "image/tiff", "image/vnd.microsoft.icon"]
+        message: ["message/http", "message/imdn+xml", "message/partial", "message/rfc822"]
+        model: ["model/example", "model/iges", "model/mesh", "model/vrml", "model/x3d+binary", "model/x3d+vrml", "model/x3d+xml"]
+        multipart: ["multipart/mixed", "multipart/alternative", "multipart/related", "multipart/form-data", "multipart/signed", "multipart/encrypted"]
+        text: ["text/cmd", "text/css", "text/csv", "text/html", "text/javascript", "text/plain", "text/vcard", "text/xml"]
+        video: ["video/mpeg", "video/mp4", "video/ogg", "video/quicktime", "video/webm", "video/x-matroska", "video/x-ms-wmv", "video/x-flv"]

test/faker/default/test_faker_file.rb

@@ -15,6 +15,11 @@ def test_mime_type_format
     assert @tester.mime_type.match(%r{(.*)/(.*)+})
   end
 
+  def test_mime_type_format_with_media_type
+    media_type = Faker::Base.translate('faker.file.mime_type').keys.sample
+    assert @tester.mime_type(media_type: media_type).match(%r{#{media_type}/(.*)+})
+  end
+
   def test_file_name
     assert @tester
       .file_name