spec/spec_helper.rb in imgkit-1.2.1 vs spec/spec_helper.rb in imgkit-1.3.0

@@ -7,13 +7,42 @@
 require 'mocha'
 require 'rack'
 require 'tempfile'
 
 RSpec.configure do |config|
-  
   config.before do
     IMGKit.any_instance.stubs(:wkhtmltoimage).returns(
       File.join(SPEC_ROOT,'..','bin','wkhtmltoimage-proxy')
     )
   end
-  
+end
+
+module MagicNumber
+  extend self
+  JPG  = "\xFF\xD8\xFF\xE0"
+  JPEG = JPG
+  PNG  = "\x89\x50\x4e\x47"
+  TIFF = "\x49\x49\x2a\x00"
+  TIF  = TIFF
+  GIF  = "\x47\x49\x46\x38"
+
+
+  if "".respond_to?(:force_encoding) 
+    constants.each { |c| const_get(c).force_encoding("ASCII-8BIT")  }
+  end
+
+  def read(string)
+    string[0,4]
+  end
+end
+
+RSpec::Matchers.define :be_a do |expected|
+  match do |actual|
+    @expected = MagicNumber.const_get(expected.to_s.upcase)
+    MagicNumber.read(actual) == @expected
+  end
+
+  failure_message_for_should do |actual|
+    actual = MagicNumber.read(actual)
+    "expctected #{actual.inspect},#{actual.encoding} to equal #{@expected.inspect},#{@expected.encoding}"
+  end
 end