X-Git-Url: http://git.code-monkey.de/?p=ruby-vorbistagger.git;a=blobdiff_plain;f=test%2Ftest_main.rb;h=bbc5b0023a2987e31af883c4573dde96f4605dd5;hp=3003783554337a3bd3b2b05722ea3d29d414038a;hb=bb2a2dcd813175bc4e1dc5ae087795ec18be8fa6;hpb=a666f7bdc7f889257a3dcdad95f759bb984253e0

diff --git a/test/test_main.rb b/test/test_main.rb
index 3003783..bbc5b00 100644
--- a/test/test_main.rb
+++ b/test/test_main.rb
@@ -1,6 +1,7 @@
 require "test/unit"
 require "ogg/vorbis/tagger"
 require "fileutils"
+require "digest/md5"
 
 class MainTest < Test::Unit::TestCase
 	OGG_FILE = "test/test.ogg"
@@ -29,6 +30,32 @@ class MainTest < Test::Unit::TestCase
 		end
 	end
 
+	def test_write_is_non_destructive
+		a = Digest::MD5.hexdigest(File.read(OGG_FILE))
+
+		Ogg::Vorbis::Tagger.open(OGG_FILE) do |t|
+			t.write
+		end
+
+		b = Digest::MD5.hexdigest(File.read(OGG_FILE))
+
+		assert_equal(a, b)
+	end
+
+	def test_multiple_writes
+		a = Digest::MD5.hexdigest(File.read(OGG_FILE))
+
+		Ogg::Vorbis::Tagger.open(OGG_FILE) do |t|
+			1.upto(10) do
+				t.write
+			end
+		end
+
+		b = Digest::MD5.hexdigest(File.read(OGG_FILE))
+
+		assert_equal(a, b)
+	end
+
 	def test_write_stable_order
 		Ogg::Vorbis::Tagger.open(OGG_FILE) do |t|
 			assert_equal(3, t.write)