Fix Issue voxpupuli#66

$ref schemas inside of allOf, anyOf, etc wasn't being loaded.  This
patch adds support for it.

lib/json-schema/validator.rb

@@ -277,6 +277,15 @@ def build_schemas(parent_schema)
         end
       end
 
+      # handle validations that always contain schemas
+      ["allOf", "anyOf", "oneOf", "not"].each do |key|
+        if parent_schema.schema.has_key?(key)
+          validations = parent_schema.schema[key]
+          validations = [validations] unless validations.is_a?(Array)
+          validations.each {|v| handle_schema(parent_schema, v) }
+        end
+      end
+
       # Check for schemas in union types
       ["type", "disallow"].each do |key|
         if parent_schema.schema[key] && parent_schema.schema[key].is_a?(Array)

test/data/any_of_ref_data.json

@@ -0,0 +1,7 @@
+{
+  "names" :
+    [ "john"
+    , "jane"
+    , "jimmy"
+    ]
+}

test/schemas/any_of_ref_jane_schema.json

@@ -0,0 +1,4 @@
+{ "$schema" : "http://json-schema.org/draft-04/schema#"
+, "type" : "string"
+, "pattern" : "jane"
+}

test/schemas/any_of_ref_jimmy_schema.json

@@ -0,0 +1,4 @@
+{ "$schema" : "http://json-schema.org/draft-04/schema#"
+, "type" : "string"
+, "pattern" : "jimmy"
+}

test/schemas/any_of_ref_john_schema.json

@@ -0,0 +1,4 @@
+{ "$schema" : "http://json-schema.org/draft-04/schema#"
+, "type" : "string"
+, "pattern" : "john"
+}

test/schemas/any_of_ref_schema.json

@@ -0,0 +1,15 @@
+{ "$schema" : "http://json-schema.org/draft-04/schema#"
+, "type" : "object"
+, "properties" :
+  { "names" :
+    { "type" : "array"
+    , "items" :
+      { "anyOf" :
+        [ { "$ref" : "any_of_ref_john_schema.json" }
+        , { "$ref" : "any_of_ref_jane_schema.json" }
+        , { "$ref" : "any_of_ref_jimmy_schema.json" }
+        ]
+      }
+    }
+  }
+}

test/test_any_of_ref_schema.rb

@@ -0,0 +1,11 @@
+require 'test/unit'
+require File.dirname(__FILE__) + '/../lib/json-schema'
+
+class AnyOfRefSchemaTest < Test::Unit::TestCase
+  def test_all_of_ref_schema
+    schema = File.join(File.dirname(__FILE__),"schemas/any_of_ref_schema.json")
+    data = File.join(File.dirname(__FILE__),"data/any_of_ref_data.json")
+    errors = JSON::Validator.fully_validate(schema,data, :errors_as_objects => true)
+    assert(errors.empty?, errors.map{|e| e[:message] }.join("\n"))
+  end
+end