Major investigation to Diff::LCS bugs.

- Fixed some formatting and style issues.
  - Trailing spaces
  - Calling class methods using '.' instead of '::'.
- Resolved Issue #2 by handling string[string.size, 1] properly (it
  returns "" not nil).
- Added special case handling for Diff::LCS.patch so that it handles
  patches that are empty or contain no changes.
- Adding temporary code to help determined the reason for the
  misidentification of patch direction.
- Added a number of different specs to check for comparing the same
  value.
- Added broken spec filtering.

1 files changed, 8 insertions, 0 deletions

diff --git a/spec/diff_spec.rb b/spec/diff_spec.rb
index d2c78a2..81f20bb 100644
--- a/spec/diff_spec.rb
+++ b/spec/diff_spec.rb
@@ -30,6 +30,14 @@ describe "Diff::LCS.diff" do
     correct_diff.each { |hunk| hunk.each { |change| change[0] = '+' } }
     change_diff(correct_diff).should == diff
   end
+
+  it "should return an empty diff with (hello, hello)" do
+    Diff::LCS.diff(hello, hello).should == []
+  end
+
+  it "should return an empty diff with (hello_ary, hello_ary)" do
+    Diff::LCS.diff(hello_ary, hello_ary).should == []
+  end
 end
 
 # vim: ft=ruby