added support for decoding image fixtures as base64

lib/fixtures.coffee

@@ -10,7 +10,7 @@ formatter = require("jsonlint/lib/formatter").formatter
 
 fs = Promise.promisifyAll(fs)
 
-extensions = ".json .js .coffee .html .txt".split(" ")
+extensions = ".json .js .coffee .html .txt .png .jpg .jpeg .gif .tif .tiff".split(" ")
 
 ## TODO: add image conversion to base64
 
@@ -69,9 +69,10 @@ class Fixtures
       when ".coffee" then @parseCoffee(p, fixture)
       when ".html"   then @parseHtml(p, fixture)
       when ".txt"    then @parseText(p, fixture)
+      when ".png", ".jpg", ".jpeg", ".gif", ".tif", ".tiff"
+        @parseImage(p, fixture)
       else
-        ## make sure to update the valid extensions
-        throw new Error("Invalid fixture extension: '#{ext}'. Acceptable file extensions are: [json, js, coffee, jpg, jpeg, png, gif, tiff]")
+        throw new Error("Invalid fixture extension: '#{ext}'. Acceptable file extensions are: #{extensions.join(", ")}")
 
   parseJson: (p, fixture) ->
     fs.readFileAsync(p, "utf8")
@@ -138,6 +139,10 @@ class Fixtures
     fs.readFileAsync(p, "utf8")
       .bind(@)
 
+  parseImage: (p, fixture) ->
+    fs.readFileAsync(p, "base64")
+      .bind(@)
+
   copyExample: (fixturesDir) ->
     src  = path.join(process.cwd(), "lib", "scaffold", "example.json")
     dest = path.join(fixturesDir, "example.json")

spec/server/unit/socket_spec.coffee

@@ -157,7 +157,7 @@ describe "Socket", ->
       @socket.onFixture("invalid.exe", cb).then ->
         obj = cb.getCall(0).args[0]
         expect(obj).to.have.property("__error")
-        expect(obj.__error).to.eq "Invalid fixture extension: '.exe'. Acceptable file extensions are: [json, js, coffee, jpg, jpeg, png, gif, tiff]"
+        expect(obj.__error).to.eq "Invalid fixture extension: '.exe'. Acceptable file extensions are: .json, .js, .coffee, .html, .txt, .png, .jpg, .jpeg, .gif, .tif, .tiff"
 
   context "#startListening", ->
     beforeEach ->