From bc408d52d22d471592a414ddf96fb64ad7c23fd9 Mon Sep 17 00:00:00 2001
From: Markus Schirp <mbj@seonic.net>
Date: Sat, 8 Dec 2012 00:52:03 +0100
Subject: [PATCH] Add a shitload of operator expansions

---
 Changelog.md                                  |   8 +-
 lib/mutant/strategy/rspec/example_lookup.rb   |  63 ++++++-
 .../rspec/example_lookup/spec_file_spec.rb    | 159 +++++++++++++++++-
 3 files changed, 217 insertions(+), 13 deletions(-)

diff --git a/Changelog.md b/Changelog.md
index d489e2b2..3c9e84d0 100644
--- a/Changelog.md
+++ b/Changelog.md
@@ -1,4 +1,10 @@
-# v0.2.1 xxx
+# v0.2.1 2012-12-07
+
+* [feature] Add a shitload of operator expansions for dm2 strategy
+
+[Compare v0.2.1..v0.2.2](https://github.com/mbj/mutant/compare/v0.2.1...v0.2.2)
+
+# v0.2.1 2012-12-07
 
 * [fixed] Crash on unavailable source location
 * [fixed] Incorrect handling of if and unless statements 
diff --git a/lib/mutant/strategy/rspec/example_lookup.rb b/lib/mutant/strategy/rspec/example_lookup.rb
index bc8aff57..b85cb0d3 100644
--- a/lib/mutant/strategy/rspec/example_lookup.rb
+++ b/lib/mutant/strategy/rspec/example_lookup.rb
@@ -56,6 +56,38 @@ module Mutant
           mutation.subject.matcher
         end
 
+        MAPPING = {
+          :'!~' => :nomatch_operator,
+          :'!=' => :inequality_operator,
+          :<=>  => :spaceship_operator,
+          :===  => :case_equality_operator,
+          :[]=  => :element_writer,
+          :[]   => :element_reader,
+          :==   => :equality_operator,
+          :<=   => :less_than_or_equal_to_operator,
+          :>=   => :greater_than_or_equal_to_operator,
+          :=~   => :match_operator,
+          :<<   => :left_shift_operator,
+          :>>   => :right_shift_operator,
+          :**   => :exponentation_operator,
+          :*    => :multiplication_operator,
+          :%    => :modulo_operator,
+          :/    => :division_operator,
+          :|    => :bitwise_or_operator,
+          :^    => :bitwise_xor_operator,
+          :&    => :bitwise_and_operator,
+          :<    => :less_than_operator,
+          :>    => :greater_than_operator,
+          :+    => :addition_operator,
+          :-    => :substraction_operator
+        }
+
+        EXPANSIONS = {
+          /\?\z/ => '_predicate',
+          /=\z/  => '_writer',
+          /!\z/  => '_bang'
+        }
+
         # Return spec file
         #
         # @return [String]
@@ -63,15 +95,34 @@ module Mutant
         # @api private
         #
         def spec_file
-          method_name.to_s.
-            gsub(/\A\[\]\z/, 'element_reader').
-            gsub(/\A\[\]=\z/, 'element_writer').
-            gsub(/\?\z/, '_predicate').
-            gsub(/=\z/, '_writer').
-            gsub(/!\z/, '_bang') + '_spec.rb'
+          "#{mapped_name || expanded_name}_spec.rb"
         end
         memoize :spec_file
 
+        # Return mapped name
+        #
+        # @return [Symbol]
+        #   if name was mapped
+        #
+        # @return [nil]
+        #   otherwise
+        #
+        def mapped_name
+          MAPPING[method_name]
+        end
+
+        # Return expanded name
+        #
+        # @return [Symbol]
+        #
+        # @api private
+        #
+        def expanded_name
+          EXPANSIONS.inject(method_name) do |name, (regexp, expansion)|
+            name.to_s.gsub(regexp, expansion)
+          end.to_sym
+        end
+
         # Return method name
         #
         # @return [Symbol]
diff --git a/spec/unit/mutant/strategy/rspec/example_lookup/spec_file_spec.rb b/spec/unit/mutant/strategy/rspec/example_lookup/spec_file_spec.rb
index 790ae899..23483fe7 100644
--- a/spec/unit/mutant/strategy/rspec/example_lookup/spec_file_spec.rb
+++ b/spec/unit/mutant/strategy/rspec/example_lookup/spec_file_spec.rb
@@ -16,15 +16,162 @@ describe Mutant::Strategy::Rspec::ExampleLookup, '#spec_file' do
     it { should be_frozen }
   end
 
+  context 'with bitwise xor method' do
+    let(:method_name) { :^ }
+    let(:expected_spec_file) { 'bitwise_xor_operator_spec.rb' }
+
+    it_should_behave_like 'Mutant::Strategy::Rspec::ExampleLookup#spec_file'
+  end
+
+  context 'with bitwise or method' do
+    let(:method_name) { :| }
+    let(:expected_spec_file) { 'bitwise_or_operator_spec.rb' }
+
+    it_should_behave_like 'Mutant::Strategy::Rspec::ExampleLookup#spec_file'
+  end
+
+  context 'with bitwise and method' do
+    let(:method_name) { :& }
+    let(:expected_spec_file) { 'bitwise_and_operator_spec.rb' }
+
+    it_should_behave_like 'Mutant::Strategy::Rspec::ExampleLookup#spec_file'
+  end
+
+  context 'with spaceship method' do
+    let(:method_name) { :<=> }
+    let(:expected_spec_file) { 'spaceship_operator_spec.rb' }
+
+    it_should_behave_like 'Mutant::Strategy::Rspec::ExampleLookup#spec_file'
+  end
+
+  context 'with case equality operator method' do
+    let(:method_name) { :=== }
+    let(:expected_spec_file) { 'case_equality_operator_spec.rb' }
+
+    it_should_behave_like 'Mutant::Strategy::Rspec::ExampleLookup#spec_file'
+  end
+
+  context 'with modulo operator method' do
+    let(:method_name) { :% }
+    let(:expected_spec_file) { 'modulo_operator_spec.rb' }
+
+    it_should_behave_like 'Mutant::Strategy::Rspec::ExampleLookup#spec_file'
+  end
+
+  context 'with exponentation operator method' do
+    let(:method_name) { :** }
+    let(:expected_spec_file) { 'exponentation_operator_spec.rb' }
+
+    it_should_behave_like 'Mutant::Strategy::Rspec::ExampleLookup#spec_file'
+  end
+
+  context 'with substraction operator method' do
+    let(:method_name) { :- }
+    let(:expected_spec_file) { 'substraction_operator_spec.rb' }
+
+    it_should_behave_like 'Mutant::Strategy::Rspec::ExampleLookup#spec_file'
+  end
+
+  context 'with addition operator method' do
+    let(:method_name) { :+ }
+    let(:expected_spec_file) { 'addition_operator_spec.rb' }
+
+    it_should_behave_like 'Mutant::Strategy::Rspec::ExampleLookup#spec_file'
+  end
+
+  context 'with greater than or equal to operator method' do
+    let(:method_name) { :>= }
+    let(:expected_spec_file) { 'greater_than_or_equal_to_operator_spec.rb' }
+
+    it_should_behave_like 'Mutant::Strategy::Rspec::ExampleLookup#spec_file'
+  end
+
+  context 'with less than or equal to operator method' do
+    let(:method_name) { :<= }
+    let(:expected_spec_file) { 'less_than_or_equal_to_operator_spec.rb' }
+
+    it_should_behave_like 'Mutant::Strategy::Rspec::ExampleLookup#spec_file'
+  end
+
+  context 'with greater than operator method' do
+    let(:method_name) { :> }
+    let(:expected_spec_file) { 'greater_than_operator_spec.rb' }
+
+    it_should_behave_like 'Mutant::Strategy::Rspec::ExampleLookup#spec_file'
+  end
+
+  context 'with less than operator method' do
+    let(:method_name) { :< }
+    let(:expected_spec_file) { 'less_than_operator_spec.rb' }
+
+    it_should_behave_like 'Mutant::Strategy::Rspec::ExampleLookup#spec_file'
+  end
+
+  context 'with right shift operator method' do
+    let(:method_name) { :>> }
+    let(:expected_spec_file) { 'right_shift_operator_spec.rb' }
+
+    it_should_behave_like 'Mutant::Strategy::Rspec::ExampleLookup#spec_file'
+  end
+
+  context 'with left shift operator method' do
+    let(:method_name) { :<< }
+    let(:expected_spec_file) { 'left_shift_operator_spec.rb' }
+
+    it_should_behave_like 'Mutant::Strategy::Rspec::ExampleLookup#spec_file'
+  end
+
+  context 'with division operator method' do
+    let(:method_name) { :/ }
+    let(:expected_spec_file) { 'division_operator_spec.rb' }
+
+    it_should_behave_like 'Mutant::Strategy::Rspec::ExampleLookup#spec_file'
+  end
+
+  context 'with multiplication operator method' do
+    let(:method_name) { :* }
+    let(:expected_spec_file) { 'multiplication_operator_spec.rb' }
+
+    it_should_behave_like 'Mutant::Strategy::Rspec::ExampleLookup#spec_file'
+  end
+
+  context 'with nomatch operator method' do
+    let(:method_name) { :'!~' }
+    let(:expected_spec_file) { 'nomatch_operator_spec.rb' }
+
+    it_should_behave_like 'Mutant::Strategy::Rspec::ExampleLookup#spec_file'
+  end
+
+  context 'with match operator method' do
+    let(:method_name) { :=~ }
+    let(:expected_spec_file) { 'match_operator_spec.rb' }
+
+    it_should_behave_like 'Mutant::Strategy::Rspec::ExampleLookup#spec_file'
+  end
+
+  context 'with inequality operator method' do
+    let(:method_name) { :'!=' }
+    let(:expected_spec_file) { 'inequality_operator_spec.rb' }
+
+    it_should_behave_like 'Mutant::Strategy::Rspec::ExampleLookup#spec_file'
+  end
+
+  context 'with equality operator method' do
+    let(:method_name) { :== }
+    let(:expected_spec_file) { 'equality_operator_spec.rb' }
+
+    it_should_behave_like 'Mutant::Strategy::Rspec::ExampleLookup#spec_file'
+  end
+
   context 'with element reader method' do
-    let(:method_name) { '[]' }
+    let(:method_name) { :[] }
     let(:expected_spec_file) { 'element_reader_spec.rb' }
 
     it_should_behave_like 'Mutant::Strategy::Rspec::ExampleLookup#spec_file'
   end
 
   context 'with element writer method' do
-    let(:method_name) { '[]=' }
+    let(:method_name) { :[]= }
 
     let(:expected_spec_file) { 'element_writer_spec.rb' }
 
@@ -32,28 +179,28 @@ describe Mutant::Strategy::Rspec::ExampleLookup, '#spec_file' do
   end
 
   context 'with writer method' do
-    let(:method_name) { 'foo=' }
+    let(:method_name) { :foo= }
     let(:expected_spec_file) { 'foo_writer_spec.rb' }
 
     it_should_behave_like 'Mutant::Strategy::Rspec::ExampleLookup#spec_file'
   end
 
   context 'with bang method' do
-    let(:method_name) { 'foo!' }
+    let(:method_name) { :foo! }
     let(:expected_spec_file) { 'foo_bang_spec.rb' }
 
     it_should_behave_like 'Mutant::Strategy::Rspec::ExampleLookup#spec_file'
   end
 
   context 'with predicate method' do
-    let(:method_name) { 'foo?' }
+    let(:method_name) { :foo? }
     let(:expected_spec_file) { 'foo_predicate_spec.rb' }
 
     it_should_behave_like 'Mutant::Strategy::Rspec::ExampleLookup#spec_file'
   end
 
   context 'with regular method' do
-    let(:method_name) { 'foo' }
+    let(:method_name) { :foo }
     let(:expected_spec_file) { 'foo_spec.rb' }
 
     it_should_behave_like 'Mutant::Strategy::Rspec::ExampleLookup#spec_file'