elo_spec.rb in elo-0.0.3.alpha

- old
+ new
@@ -1,7 +1,148 @@
 require File.expand_path(File.dirname(__FILE__) + '/spec_helper')
 
 describe "Elo" do
-  it "fails" do
-    fail "hey buddy, you should probably rename this file and start specing for real"
+
+  after do
+    Elo.instance_eval { @config = nil }
   end
+
+  it "should work as advertised" do
+
+    bob  = Elo::Player.new
+    jane = Elo::Player.new(:rating => 1500)
+
+    game1 = bob.wins_from(jane)
+    game2 = bob.loses_from(jane)
+    game3 = bob.plays_draw(jane)
+
+    game4 = bob.versus(jane)
+    game4.winner = jane
+
+    game5 = bob.versus(jane)
+    game5.loser = jane
+
+    game6 = bob.versus(jane)
+    game6.draw
+
+    game7 = bob.versus(jane)
+    game7.result = 1
+
+    bob.rating.should == 1084
+    jane.rating.should == 1409
+    bob.should_not be_pro
+    bob.should be_starter
+    bob.games_played.should == 7
+    bob.games.should == [ game1, game2, game3, game4, game5, game6, game7 ]
+
+    Elo::Player.all.should == [ bob, jane ]
+    Elo::Game.all.should == [ game1, game2, game3, game4, game5, game6, game7 ]
+
+  end
+
+  describe "Configuration" do
+
+    it "default_rating" do
+      Elo.config.default_rating.should == 1000
+      Elo::Player.new.rating.should    == 1000
+
+      Elo.config.default_rating = 1337
+
+      Elo.config.default_rating.should == 1337
+      Elo::Player.new.rating.should    == 1337
+    end
+
+    it "starter_boundry" do
+      Elo.config.starter_boundry.should == 30
+      Elo::Player.new(:games_played => 20).should be_starter
+
+      Elo.config.starter_boundry = 15
+
+      Elo.config.starter_boundry.should == 15
+      Elo::Player.new(:games_played => 20).should_not be_starter
+    end
+
+    it "default_k_factor and FIDE settings" do
+      Elo.config.use_FIDE_settings.should    == true
+      Elo.config.default_k_factor.should     == 15
+
+      Elo.config.default_k_factor = 20
+      Elo.config.use_FIDE_settings = false
+
+      Elo.config.default_k_factor.should     == 20
+      Elo.config.use_FIDE_settings.should    == false
+      Elo::Player.new.k_factor.should == 20
+    end
+
+    it "pro_rating_boundry" do
+      Elo.config.pro_rating_boundry.should == 2400
+
+      Elo.config.pro_rating_boundry = 1337
+
+      Elo.config.pro_rating_boundry.should == 1337
+      Elo::Player.new(:rating => 1337).should be_pro_rating
+    end
+
+  end
+
+  describe "according to FIDE" do
+
+    it "starter" do
+      player = Elo::Player.new
+      player.k_factor.should == 25
+      player.should be_starter
+      player.should_not be_pro
+      player.should_not be_pro_rating
+    end
+
+    it "normal" do
+      player = Elo::Player.new(:rating => 2399, :games_played => 30)
+      player.k_factor.should == 15
+      player.should_not be_starter
+      player.should_not be_pro
+      player.should_not be_pro_rating
+    end
+
+    it "pro rating" do
+      player = Elo::Player.new(:rating => 2400)
+      player.k_factor.should == 10
+      player.should be_starter
+      player.should be_pro_rating
+      player.should_not be_pro
+    end
+
+    it "historically a pro" do
+      player = Elo::Player.new(:rating => 2399, :pro => true)
+      player.k_factor.should == 10
+      player.should be_starter
+      player.should_not be_pro_rating
+      player.should be_pro
+    end
+  end
+
+  describe "examples for calculating rating correctly" do
+
+    # examples from http://chesselo.com/
+
+    before do
+      @a = Elo::Player.new(:rating => 2000, :k_factor => 10)
+      @b = Elo::Player.new(:rating => 1900, :k_factor => 10)
+    end
+
+    it "winning" do
+      @a.wins_from(@b)
+      @a.rating.should == 2003
+    end
+
+    it "losing" do
+      @a.loses_from(@b)
+      @a.rating.should == 1993
+    end
+
+    it "draw" do
+      @a.plays_draw(@b)
+      @a.rating.should == 1998
+    end
+
+  end
+
 end