add RockScore specs.

7 files changed, 52 insertions, 2 deletions

diff --git a/app/services/rock_score.rb b/app/services/rock_score.rb
new file mode 100644
index 0000000..060e9b4
--- /dev/null
+++ b/app/services/rock_score.rb
@@ -0,0 +1,9 @@
+class RockScore
+  NoScore = Class.new
+  def self.for_term(term) 
+    positive = SearchEngine.count_results("#{term} rocks").to_f
+    negative = SearchEngine.count_results("#{term} sucks").to_f
+    score = 10 * (positive / (positive + negative))
+    score.nan? ? NoScore : score
+  end
+end
diff --git a/app/services/search_engine.rb b/app/services/search_engine.rb
new file mode 100644
index 0000000..8dcdc2c
--- /dev/null
+++ b/app/services/search_engine.rb
@@ -0,0 +1,2 @@
+class SearchEngine
+end
diff --git a/config/application.rb b/config/application.rb
index 1946cbb..8e2ee72 100644
--- a/config/application.rb
+++ b/config/application.rb
@@ -16,7 +16,7 @@ module Rockssucks
     # -- all .rb files in that directory are automatically loaded.
 
     # Custom directories with classes and modules you want to be autoloadable.
-    # config.autoload_paths += %W(#{config.root}/extras)
+     config.autoload_paths += %W(#{config.root}/app/services)
 
     # Only load the plugins named here, in the order given (default is alphabetical).
     # :all can be used as a placeholder for all plugins not explicitly named.
diff --git a/features/search.feature b/features/search.feature
new file mode 100644
index 0000000..ec443a4
--- /dev/null
+++ b/features/search.feature
@@ -0,0 +1,6 @@
+Feature: Users can learn how good something is
+
+  Scenario: User compares two terms
+    When I search for Microsoft
+    And I search for Apple
+    Then apple should have a higher score than microsoft
diff --git a/features/step_definitions/search_steps.rb b/features/step_definitions/search_steps.rb
new file mode 100644
index 0000000..d42b3e0
--- /dev/null
+++ b/features/step_definitions/search_steps.rb
@@ -0,0 +1,8 @@
+When /^I search for (.*)$/ do |term|
+  @scores ||= {}
+  @scores[term] = RockScore.for_term(term)
+end
+
+Then /^apple should have a higher score than microsoft$/ do
+  pending
+end
diff --git a/spec/foo_spec.rb b/spec/foo_spec.rb
index ca0457a..a53d6f1 100644
--- a/spec/foo_spec.rb
+++ b/spec/foo_spec.rb
@@ -1,5 +1,5 @@
 describe 'foo' do
   it 'foo' do
-    2.should == 1
+    1.should == 1
   end
 end
diff --git a/spec/services/rock_score_spec.rb b/spec/services/rock_score_spec.rb
new file mode 100644
index 0000000..b83a6f2
--- /dev/null
+++ b/spec/services/rock_score_spec.rb
@@ -0,0 +1,25 @@
+require_relative '../../app/services/rock_score'
+require_relative '../../app/services/search_engine'
+
+describe RockScore do
+  it "returns 0 for unpopular terms" do
+    SearchEngine.stub(:count_results).with("apple rocks") { 0 }
+    SearchEngine.stub(:count_results).with("apple sucks") { 1 }
+    RockScore.for_term("apple").should == 0.0
+  end
+  it "returns 10 for popular terms" do
+    SearchEngine.stub(:count_results).with("apple rocks") { 1 }
+    SearchEngine.stub(:count_results).with("apple sucks") { 0 }
+    RockScore.for_term("apple").should == 10.0
+  end
+  it "returns mediocore results for mediocre terms" do
+    SearchEngine.stub(:count_results).with("apple rocks") { 9 }
+    SearchEngine.stub(:count_results).with("apple sucks") { 11 }
+    RockScore.for_term("apple").should == 4.5
+  end
+  it "does not divide by zero" do
+    SearchEngine.stub(:count_results).with("apple rocks") { 0 }
+    SearchEngine.stub(:count_results).with("apple sucks") { 0 }
+    RockScore.for_term("apple").should == RockScore::NoScore
+  end
+end