implement File finding

test/examples/lotr.git/refs/heads/master

@@ -1 +1 @@
-fbabba862dfa7ac35b39042dd4ad780c9f67b8cb
+f01428b3138994aab19d5f880b6f37336ddf1f24

test/test_file.rb

@@ -7,5 +7,11 @@ context "File" do
 
   test "new file" do
     file = Gollum::File.new(@wiki)
+    assert_nil file.raw_data
+  end
+
+  test "existing file" do
+    file = @wiki.file("Mordor/todo.txt")
+    assert_equal "[ ] Write section on Ents\n", file.raw_data
   end
 end

test/test_page.rb

@@ -18,7 +18,7 @@ context "Page" do
     assert page.formatted_data =~ /<h1>Bilbo Baggins<\/h1>\n\n<p>Bilbo Baggins/
     assert_equal 'Bilbo-Baggins.md', page.path
     assert_equal :markdown, page.format
-    assert_equal 'fbabba862dfa7ac35b39042dd4ad780c9f67b8cb', page.version.id
+    assert_equal @wiki.repo.commits.first.id, page.version.id
   end
 
   test "get nested page" do