1 files changed, 50 insertions, 0 deletions
diff --git a/actionview/lib/action_view/testing/resolvers.rb b/actionview/lib/action_view/testing/resolvers.rb
new file mode 100644
index 0000000000..7afa2fa613
--- /dev/null
+++ b/actionview/lib/action_view/testing/resolvers.rb
@@ -0,0 +1,50 @@
+require 'action_view/template/resolver'
+
+module ActionView #:nodoc:
+  # Use FixtureResolver in your tests to simulate the presence of files on the
+  # file system. This is used internally by Rails' own test suite, and is
+  # useful for testing extensions that have no way of knowing what the file
+  # system will look like at runtime.
+  class FixtureResolver < PathResolver
+    attr_reader :hash
+
+    def initialize(hash = {}, pattern=nil)
+      super(pattern)
+      @hash = hash
+    end
+
+    def to_s
+      @hash.keys.join(', ')
+    end
+
+  private
+
+    def query(path, exts, formats)
+      query = ""
+      EXTENSIONS.each do |ext|
+        query << '(' << exts[ext].map {|e| e && Regexp.escape(".#{e}") }.join('|') << '|)'
+      end
+      query = /^(#{Regexp.escape(path)})#{query}$/
+
+      templates = []
+      @hash.each do |_path, array|
+        source, updated_at = array
+        next unless _path =~ query
+        handler, format = extract_handler_and_format(_path, formats)
+        templates << Template.new(source, _path, handler,
+          :virtual_path => path.virtual, :format => format, :updated_at => updated_at)
+      end
+
+      templates.sort_by {|t| -t.identifier.match(/^#{query}$/).captures.reject(&:blank?).size }
+    end
+  end
+
+  class NullResolver < PathResolver
+    def query(path, exts, formats)
+      handler, format = extract_handler_and_format(path, formats)
+      [ActionView::Template.new("Template generated by Null Resolver", path, handler, :virtual_path => path, :format => format)]
+    end
+  end
+
+end
+