Fix an issue with negative hunk max_size

.github/workflows/ci.yml

@@ -60,4 +60,4 @@ jobs:
       - name: Install dependencies
         run: bundle install
       - name: Run tests
-        run: bundle exec rake
+        run: bundle exec ruby -S rake

Rakefile

@@ -24,22 +24,11 @@ _spec = Hoe.spec 'diff-lcs' do
   extra_dev_deps << ['hoe-gemspec2', '~> 1.1']
   extra_dev_deps << ['hoe-git', '~> 1.6']
   extra_dev_deps << ['hoe-rubygems', '~> 1.0']
-  extra_dev_deps << ['hoe-travis', '~> 1.2']
   extra_dev_deps << ['rspec', '>= 2.0', '< 4']
   extra_dev_deps << ['rake', '>= 10.0', '< 14']
   extra_dev_deps << ['rdoc', '>= 0']
 end
 
-require "rspec/core/rake_task"
-
-desc "Run all specifications"
-RSpec::Core::RakeTask.new(:spec) do |t|
-  rspec_dirs = %w(spec lib)
-  t.rspec_opts = []
-  t.rspec_opts << "-I#{rspec_dirs.join(":")}" unless rspec_dirs.empty?
-end
-task :default => :spec
-
 if RUBY_VERSION >= '2.0' && RUBY_ENGINE == 'ruby'
   namespace :spec do
     desc "Runs test coverage. Only works Ruby 2.0+ and assumes 'simplecov' is installed."

diff-lcs.gemspec

@@ -1,16 +1,16 @@
 # -*- encoding: utf-8 -*-
-# stub: diff-lcs 1.4 ruby lib
+# stub: diff-lcs 1.4.1 ruby lib
 
 Gem::Specification.new do |s|
   s.name = "diff-lcs".freeze
-  s.version = "1.4"
+  s.version = "1.4.1"
 
   s.required_rubygems_version = Gem::Requirement.new(">= 0".freeze) if s.respond_to? :required_rubygems_version=
   s.metadata = { "bug_tracker_uri" => "https://github.com/halostatue/diff-lcs/issues", "homepage_uri" => "https://github.com/halostatue/diff-lcs", "source_code_uri" => "https://github.com/halostatue/diff-lcs" } if s.respond_to? :metadata=
   s.require_paths = ["lib".freeze]
   s.authors = ["Austin Ziegler".freeze]
-  s.date = "2020-06-22"
-  s.description = "Diff::LCS computes the difference between two Enumerable sequences using the\nMcIlroy-Hunt longest common subsequence (LCS) algorithm. It includes utilities\nto create a simple HTML diff output format and a standard diff-like tool.\n\nThis is release 1.4, providing a simple extension that allows for\nDiff::LCS::Change objects to be treated implicitly as arrays. Ruby versions\nbelow 2.3 are soft-deprecated.\n\nThis means that older versions are no longer part of the CI test suite. If any\nchanges have been introduced that break those versions, bug reports and patches\nwill be accepted, but it will be up to the reporter to verify any fixes prior\nto release. A future release will completely break compatibility.".freeze
+  s.date = "2020-06-23"
+  s.description = "Diff::LCS computes the difference between two Enumerable sequences using the\nMcIlroy-Hunt longest common subsequence (LCS) algorithm. It includes utilities\nto create a simple HTML diff output format and a standard diff-like tool.\n\nThis is release 1.4, providing a simple extension that allows for\nDiff::LCS::Change objects to be treated implicitly as arrays. Ruby versions\nbelow 2.5 are soft-deprecated.\n\nThis means that older versions are no longer part of the CI test suite. If any\nchanges have been introduced that break those versions, bug reports and patches\nwill be accepted, but it will be up to the reporter to verify any fixes prior\nto release. A future release will completely break compatibility.".freeze
   s.email = ["halostatue@gmail.com".freeze]
   s.executables = ["htmldiff".freeze, "ldiff".freeze]
   s.extra_rdoc_files = ["Code-of-Conduct.md".freeze, "Contributing.md".freeze, "History.md".freeze, "License.md".freeze, "Manifest.txt".freeze, "README.rdoc".freeze, "docs/COPYING.txt".freeze, "docs/artistic.txt".freeze]
@@ -30,7 +30,6 @@ Gem::Specification.new do |s|
       s.add_development_dependency(%q<hoe-gemspec2>.freeze, ["~> 1.1"])
       s.add_development_dependency(%q<hoe-git>.freeze, ["~> 1.6"])
       s.add_development_dependency(%q<hoe-rubygems>.freeze, ["~> 1.0"])
-      s.add_development_dependency(%q<hoe-travis>.freeze, ["~> 1.2"])
       s.add_development_dependency(%q<rspec>.freeze, [">= 2.0", "< 4"])
       s.add_development_dependency(%q<rake>.freeze, [">= 10.0", "< 14"])
       s.add_development_dependency(%q<rdoc>.freeze, [">= 0"])
@@ -40,7 +39,6 @@ Gem::Specification.new do |s|
       s.add_dependency(%q<hoe-gemspec2>.freeze, ["~> 1.1"])
       s.add_dependency(%q<hoe-git>.freeze, ["~> 1.6"])
       s.add_dependency(%q<hoe-rubygems>.freeze, ["~> 1.0"])
-      s.add_dependency(%q<hoe-travis>.freeze, ["~> 1.2"])
       s.add_dependency(%q<rspec>.freeze, [">= 2.0", "< 4"])
       s.add_dependency(%q<rake>.freeze, [">= 10.0", "< 14"])
       s.add_dependency(%q<rdoc>.freeze, [">= 0"])
@@ -51,7 +49,6 @@ Gem::Specification.new do |s|
     s.add_dependency(%q<hoe-gemspec2>.freeze, ["~> 1.1"])
     s.add_dependency(%q<hoe-git>.freeze, ["~> 1.6"])
     s.add_dependency(%q<hoe-rubygems>.freeze, ["~> 1.0"])
-    s.add_dependency(%q<hoe-travis>.freeze, ["~> 1.2"])
     s.add_dependency(%q<rspec>.freeze, [">= 2.0", "< 4"])
     s.add_dependency(%q<rake>.freeze, [">= 10.0", "< 14"])
     s.add_dependency(%q<rdoc>.freeze, [">= 0"])

lib/diff/lcs.rb

@@ -49,7 +49,7 @@ module Diff; end unless defined? Diff # rubocop:disable Style/Documentation
 #          a x b y c z p d q
 #    a b c a x b y c z
 module Diff::LCS
-  VERSION = '1.4'
+  VERSION = '1.4.1'
 end
 
 require 'diff/lcs/callbacks'

lib/diff/lcs/block.rb

@@ -19,7 +19,7 @@ def initialize(chunk)
   end
 
   def diff_size
-    @insert.size - @remove.size
+    (@insert.size - @remove.size).abs
   end
 
   def op

spec/issues_spec.rb

@@ -54,4 +54,14 @@
       ]
     end
   end
+
+  describe "issue #57" do
+    it 'should fail with a correct error' do
+      expect {
+        actual = {:category=>"app.rack.request"}
+        expected = {:category=>"rack.middleware", :title=>"Anonymous Middleware"}
+        expect(actual).to eq(expected)
+      }.to raise_error(RSpec::Expectations::ExpectationNotMetError)
+    end
+  end
 end

spec/ldiff_spec.rb

@@ -36,12 +36,14 @@ def read_fixture(flag = nil)
   end
 
   def clean_data(data, flag)
-    case flag
-    when '-c', '-u'
-      clean_output_timestamp(data)
-    else
-      data
-    end
+    data =
+      case flag
+      when '-c', '-u'
+        clean_output_timestamp(data)
+      else
+        data
+      end
+    data.gsub(/\r\n?/, "\n")
   end
 
   def clean_output_timestamp(data)