Patched protocol validation bug. Added CcheableImage component unit tests. Fixed additional casing issue.

Author: billmalarky

lib/imageCacheHoc.js

@@ -65,7 +65,7 @@ export default function imageCacheHoc(Image, options = {}) {
       // Define validator options
       let validatorUrlOptions = { protocols: this.options.validProtocols, require_protocol: true };
       if (this.options.fileHostWhitelist.length) {
-        validatorUrlOptions.host_whitelist = this.props.fileHostWhitelist;
+        validatorUrlOptions.host_whitelist = this.options.fileHostWhitelist;
       }
 
       // Validate source prop to be a valid web accessible url.
@@ -91,7 +91,7 @@ export default function imageCacheHoc(Image, options = {}) {
       let permanentFileExists = this.fileSystem.exists('permanent/' + fileName);
       let cacheFileExists = this.fileSystem.exists('cache/' + fileName);
 
-      Promise.all([permanentFileExists, cacheFileExists])
+      return Promise.all([permanentFileExists, cacheFileExists])
         .then( result => {
 
           if (result[0]) {