A fix+specs for Diff::LCS::ChangeTypeTests predicates

lib/diff/lcs/change.rb

@@ -30,15 +30,15 @@ def unchanged?
   end
 
   def changed?
-    @changed == '!'
+    @action == '!'
   end
 
   def finished_a?
-    @changed == '>'
+    @action == '>'
   end
 
   def finished_b?
-    @changed == '<'
+    @action == '<'
   end
 end
 

spec/change_spec.rb

@@ -0,0 +1,70 @@
+# -*- ruby encoding: utf-8 -*-
+
+require 'spec_helper'
+
+describe Diff::LCS::Change do
+
+  describe "an add" do
+    subject { described_class.new('+', 0, 'element') }
+    it { should_not be_deleting()   }
+    it { should     be_adding()     }
+    it { should_not be_unchanged()  }
+    it { should_not be_changed()    }
+    it { should_not be_finished_a() }
+    it { should_not be_finished_b() }
+  end
+
+  describe "a delete" do
+    subject { described_class.new('-', 0, 'element') }
+    it { should     be_deleting()   }
+    it { should_not be_adding()     }
+    it { should_not be_unchanged()  }
+    it { should_not be_changed()    }
+    it { should_not be_finished_a() }
+    it { should_not be_finished_b() }
+  end
+
+  describe "an unchanged" do
+    subject { described_class.new('=', 0, 'element') }
+    it { should_not be_deleting()   }
+    it { should_not be_adding()     }
+    it { should     be_unchanged()  }
+    it { should_not be_changed()    }
+    it { should_not be_finished_a() }
+    it { should_not be_finished_b() }
+  end
+
+  describe "a changed" do
+    subject { described_class.new('!', 0, 'element') }
+    it { should_not be_deleting()   }
+    it { should_not be_adding()     }
+    it { should_not be_unchanged()  }
+    it { should     be_changed()    }
+    it { should_not be_finished_a() }
+    it { should_not be_finished_b() }
+  end
+
+  describe "a finished_a" do
+    subject { described_class.new('>', 0, 'element') }
+    it { should_not be_deleting()   }
+    it { should_not be_adding()     }
+    it { should_not be_unchanged()  }
+    it { should_not be_changed()    }
+    it { should     be_finished_a() }
+    it { should_not be_finished_b() }
+  end
+
+  describe "a finished_b" do
+    subject { described_class.new('<', 0, 'element') }
+    it { should_not be_deleting()   }
+    it { should_not be_adding()     }
+    it { should_not be_unchanged()  }
+    it { should_not be_changed()    }
+    it { should_not be_finished_a() }
+    it { should     be_finished_b() }
+  end
+
+
+end
+
+# vim: ft=ruby