1 files changed, 35 insertions, 0 deletions
diff --git a/actionpack/lib/action_view/testing/resolvers.rb b/actionpack/lib/action_view/testing/resolvers.rb
new file mode 100644
index 0000000000..f468e57c26
--- /dev/null
+++ b/actionpack/lib/action_view/testing/resolvers.rb
@@ -0,0 +1,35 @@
+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 = {})
+      super()
+      @hash = hash
+    end
+
+  private
+
+    def query(path, exts, formats)
+      query = Regexp.escape(path)
+      exts.each do |ext|
+        query << '(' << ext.map {|e| e && Regexp.escape(".#{e}") }.join('|') << '|)'
+      end
+
+      templates = []
+      @hash.select { |k,v| k =~ /^#{query}$/ }.each do |path, source|
+        handler, format = extract_handler_and_format(path, formats)
+        templates << Template.new(source, path, handler,
+          :virtual_path => path, :format => format)
+      end
+
+      templates.sort_by {|t| -t.identifier.match(/^#{query}$/).captures.reject(&:blank?).size }
+    end
+  end
+end
+