1 files changed, 25 insertions, 0 deletions
diff --git a/spec/ruby/core/string/unpack/comment_spec.rb b/spec/ruby/core/string/unpack/comment_spec.rb
new file mode 100644
index 0000000000..050d2b7fc0
--- /dev/null
+++ b/spec/ruby/core/string/unpack/comment_spec.rb
@@ -0,0 +1,25 @@
+# encoding: binary
+require_relative '../../../spec_helper'
+require_relative '../fixtures/classes'
+
+describe "String#unpack" do
+  it "ignores directives text from '#' to the first newline" do
+    "\x01\x02\x03".unpack("c#this is a comment\nc").should == [1, 2]
+  end
+
+  it "ignores directives text from '#' to the end if no newline is present" do
+    "\x01\x02\x03".unpack("c#this is a comment c").should == [1]
+  end
+
+  it "ignores comments at the start of the directives string" do
+    "\x01\x02\x03".unpack("#this is a comment\nc").should == [1]
+  end
+
+  it "ignores the entire directive string if it is a comment" do
+    "\x01\x02\x03".unpack("#this is a comment c").should == []
+  end
+
+  it "ignores multiple comments" do
+    "\x01\x02\x03".unpack("c#comment\nc#comment\nc#c").should == [1, 2, 3]
+  end
+end