Cleaning up the specs.

1 files changed, 204 insertions, 0 deletions

diff --git a/spec/sdiff_spec.rb b/spec/sdiff_spec.rb
new file mode 100644
index 0000000..f174c35
--- /dev/null
+++ b/spec/sdiff_spec.rb
@@ -0,0 +1,204 @@
+# -*- ruby encoding: utf-8 -*-
+
+require 'spec_helper'
+
+describe "Diff::LCS.sdiff" do
+  include Diff::LCS::SpecHelper::Matchers
+
+  shared_examples "compare sequences correctly" do
+    it "should compare s1 -> s2 correctly" do
+      Diff::LCS.sdiff(s1, s2).should == context_diff(result)
+    end
+
+    it "should compare s2 -> s1 correctly" do
+      Diff::LCS.sdiff(s2, s1).should == context_diff(reverse_sdiff(result))
+    end
+  end
+
+  describe "using seq1 & seq2" do
+    let(:s1) { seq1 }
+    let(:s2) { seq2 }
+    let(:result) { correct_forward_sdiff }
+
+    it_should_behave_like "compare sequences correctly"
+  end
+
+  describe "using %w(abc def yyy xxx ghi jkl) & %w(abc dxf xxx ghi jkl)" do
+    let(:s1) { %w(abc def yyy xxx ghi jkl) }
+    let(:s2) { %w(abc dxf xxx ghi jkl) }
+    let(:result) {
+      [
+        [ '=', [ 0, 'abc' ], [ 0, 'abc' ] ],
+        [ '!', [ 1, 'def' ], [ 1, 'dxf' ] ],
+        [ '-', [ 2, 'yyy' ], [ 2,  nil  ] ],
+        [ '=', [ 3, 'xxx' ], [ 2, 'xxx' ] ],
+        [ '=', [ 4, 'ghi' ], [ 3, 'ghi' ] ],
+        [ '=', [ 5, 'jkl' ], [ 4, 'jkl' ] ]
+      ]
+    }
+
+    it_should_behave_like "compare sequences correctly"
+  end
+
+  describe "using %w(a b c d e) & %w(a e)" do
+    let(:s1) { %w(a b c d e) }
+    let(:s2) { %w(a e) }
+    let(:result) {
+      [
+        [ '=', [ 0, 'a' ], [ 0, 'a' ] ],
+        [ '-', [ 1, 'b' ], [ 1, nil ] ],
+        [ '-', [ 2, 'c' ], [ 1, nil ] ],
+        [ '-', [ 3, 'd' ], [ 1, nil ] ],
+        [ '=', [ 4, 'e' ], [ 1, 'e' ] ]
+      ]
+    }
+
+    it_should_behave_like "compare sequences correctly"
+  end
+
+  describe "using %w(a e) & %w(a b c d e)" do
+    let(:s1) { %w(a e) }
+    let(:s2) { %w(a b c d e) }
+    let(:result) {
+      [
+        [ '=', [ 0, 'a' ], [ 0, 'a' ] ],
+        [ '+', [ 1, nil ], [ 1, 'b' ] ],
+        [ '+', [ 1, nil ], [ 2, 'c' ] ],
+        [ '+', [ 1, nil ], [ 3, 'd' ] ],
+        [ '=', [ 1, 'e' ], [ 4, 'e' ] ]
+      ]
+    }
+
+    it_should_behave_like "compare sequences correctly"
+  end
+
+  describe "using %w(v x a e) & %w(w y a b c d e)" do
+    let(:s1) { %w(v x a e) }
+    let(:s2) { %w(w y a b c d e) }
+    let(:result) {
+      [
+        [ '!', [ 0, 'v' ], [ 0, 'w' ] ],
+        [ '!', [ 1, 'x' ], [ 1, 'y' ] ],
+        [ '=', [ 2, 'a' ], [ 2, 'a' ] ],
+        [ '+', [ 3, nil ], [ 3, 'b' ] ],
+        [ '+', [ 3, nil ], [ 4, 'c' ] ],
+        [ '+', [ 3, nil ], [ 5, 'd' ] ],
+        [ '=', [ 3, 'e' ], [ 6, 'e' ] ]
+      ]
+    }
+
+    it_should_behave_like "compare sequences correctly"
+  end
+
+  describe "using %w(x a e) & %w(a b c d e)" do
+    let(:s1) { %w(x a e) }
+    let(:s2) { %w(a b c d e) }
+    let(:result) {
+      [
+        [ '-', [ 0, 'x' ], [ 0, nil ] ],
+        [ '=', [ 1, 'a' ], [ 0, 'a' ] ],
+        [ '+', [ 2, nil ], [ 1, 'b' ] ],
+        [ '+', [ 2, nil ], [ 2, 'c' ] ],
+        [ '+', [ 2, nil ], [ 3, 'd' ] ],
+        [ '=', [ 2, 'e' ], [ 4, 'e' ] ]
+      ]
+    }
+
+    it_should_behave_like "compare sequences correctly"
+  end
+
+  describe "using %w(a e) & %w(x a b c d e)" do
+    let(:s1) { %w(a e) }
+    let(:s2) { %w(x a b c d e) }
+    let(:result) {
+      [
+        [ '+', [ 0, nil ], [ 0, 'x' ] ],
+        [ '=', [ 0, 'a' ], [ 1, 'a' ] ],
+        [ '+', [ 1, nil ], [ 2, 'b' ] ],
+        [ '+', [ 1, nil ], [ 3, 'c' ] ],
+        [ '+', [ 1, nil ], [ 4, 'd' ] ],
+        [ '=', [ 1, 'e' ], [ 5, 'e' ] ]
+      ]
+    }
+
+    it_should_behave_like "compare sequences correctly"
+  end
+
+  describe "using %w(a e v) & %w(x a b c d e w x)" do
+    let(:s1) { %w(a e v) }
+    let(:s2) { %w(x a b c d e w x) }
+    let(:result) {
+      [
+        [ '+', [ 0, nil ], [ 0, 'x' ] ],
+        [ '=', [ 0, 'a' ], [ 1, 'a' ] ],
+        [ '+', [ 1, nil ], [ 2, 'b' ] ],
+        [ '+', [ 1, nil ], [ 3, 'c' ] ],
+        [ '+', [ 1, nil ], [ 4, 'd' ] ],
+        [ '=', [ 1, 'e' ], [ 5, 'e' ] ],
+        [ '!', [ 2, 'v' ], [ 6, 'w' ] ],
+        [ '+', [ 3, nil ], [ 7, 'x' ] ]
+      ]
+    }
+
+    it_should_behave_like "compare sequences correctly"
+  end
+
+  describe "using %w() & %w(a b c)" do
+    let(:s1) { %w() }
+    let(:s2) { %w(a b c) }
+    let(:result) {
+      [
+        [ '+', [ 0, nil ], [ 0, 'a' ] ],
+        [ '+', [ 0, nil ], [ 1, 'b' ] ],
+        [ '+', [ 0, nil ], [ 2, 'c' ] ]
+      ]
+    }
+
+    it_should_behave_like "compare sequences correctly"
+  end
+
+  describe "using %w(a b c) & %w(1)" do
+    let(:s1) { %w(a b c) }
+    let(:s2) { %w(1) }
+    let(:result) {
+      [
+        [ '!', [ 0, 'a' ], [ 0, '1' ] ],
+        [ '-', [ 1, 'b' ], [ 1, nil ] ],
+        [ '-', [ 2, 'c' ], [ 1, nil ] ]
+      ]
+    }
+
+    it_should_behave_like "compare sequences correctly"
+  end
+
+  describe "using %w(a b c) & %w(c)" do
+    let(:s1) { %w(a b c) }
+    let(:s2) { %w(c) }
+    let(:result) {
+      [
+        [ '-', [ 0, 'a' ], [ 0, nil ] ],
+        [ '-', [ 1, 'b' ], [ 0, nil ] ],
+        [ '=', [ 2, 'c' ], [ 0, 'c' ] ]
+      ]
+    }
+
+    it_should_behave_like "compare sequences correctly"
+  end
+
+  describe "using %w(abcd efgh ijkl mnop) & []" do
+    let(:s1) { %w(abcd efgh ijkl mnop) }
+    let(:s2) { [] }
+    let(:result) {
+      [
+        [ '-', [ 0, 'abcd' ], [ 0, nil ] ],
+        [ '-', [ 1, 'efgh' ], [ 0, nil ] ],
+        [ '-', [ 2, 'ijkl' ], [ 0, nil ] ],
+        [ '-', [ 3, 'mnop' ], [ 0, nil ] ]
+      ]
+    }
+
+    it_should_behave_like "compare sequences correctly"
+  end
+end
+
+# vim: ft=ruby