Additional real-world Float#to_s specs

Author: chrisseaton

spec/ruby/core/float/to_s_spec.rb

@@ -223,6 +223,70 @@
       "\xD7\xA3p=\nwY@".unpack1('D').to_s.should == "101.86"
       "\xF3\xE6p\xAD\xF6\xC3x@".unpack1('D').to_s.should == "396.247724"
     end
+
+    it "random values from divisions" do
+      (1.0 / 7).to_s.should == "0.14285714285714285"
+
+      # 50.times do
+      #    a = rand(10)
+      #    b = rand(10)
+      #    c = rand(10)
+      #    d = rand(10)
+      #    expression = "#{a}.#{b} / #{c}.#{d}"
+      #    puts "      (#{expression}).to_s.should == #{eval(expression).to_s.inspect}"
+      #  end
+
+      (1.1 / 7.1).to_s.should == "0.15492957746478875"
+      (6.5 / 8.8).to_s.should == "0.7386363636363635"
+      (4.8 / 4.3).to_s.should == "1.1162790697674418"
+      (4.0 / 1.9).to_s.should == "2.1052631578947367"
+      (9.1 / 0.8).to_s.should == "11.374999999999998"
+      (5.3 / 7.5).to_s.should == "0.7066666666666667"
+      (2.8 / 1.8).to_s.should == "1.5555555555555554"
+      (2.1 / 2.5).to_s.should == "0.8400000000000001"
+      (3.5 / 6.0).to_s.should == "0.5833333333333334"
+      (4.6 / 0.3).to_s.should == "15.333333333333332"
+      (0.6 / 2.4).to_s.should == "0.25"
+      (1.3 / 9.1).to_s.should == "0.14285714285714288"
+      (0.3 / 5.0).to_s.should == "0.06"
+      (5.0 / 4.2).to_s.should == "1.1904761904761905"
+      (3.0 / 2.0).to_s.should == "1.5"
+      (6.3 / 2.0).to_s.should == "3.15"
+      (5.4 / 6.0).to_s.should == "0.9"
+      (9.6 / 8.1).to_s.should == "1.1851851851851851"
+      (8.7 / 1.6).to_s.should == "5.437499999999999"
+      (1.9 / 7.8).to_s.should == "0.24358974358974358"
+      (0.5 / 2.1).to_s.should == "0.23809523809523808"
+      (9.3 / 5.8).to_s.should == "1.6034482758620692"
+      (2.7 / 8.0).to_s.should == "0.3375"
+      (9.7 / 7.8).to_s.should == "1.2435897435897436"
+      (8.1 / 2.4).to_s.should == "3.375"
+      (7.7 / 2.7).to_s.should == "2.8518518518518516"
+      (7.9 / 1.7).to_s.should == "4.647058823529412"
+      (6.5 / 8.2).to_s.should == "0.7926829268292683"
+      (7.8 / 9.6).to_s.should == "0.8125"
+      (2.2 / 4.6).to_s.should == "0.47826086956521746"
+      (0.0 / 1.0).to_s.should == "0.0"
+      (8.3 / 2.9).to_s.should == "2.8620689655172415"
+      (3.1 / 6.1).to_s.should == "0.5081967213114754"
+      (2.8 / 7.8).to_s.should == "0.358974358974359"
+      (8.0 / 0.1).to_s.should == "80.0"
+      (1.7 / 6.4).to_s.should == "0.265625"
+      (1.8 / 5.4).to_s.should == "0.3333333333333333"
+      (8.0 / 5.8).to_s.should == "1.3793103448275863"
+      (5.2 / 4.1).to_s.should == "1.2682926829268295"
+      (9.8 / 5.8).to_s.should == "1.6896551724137934"
+      (5.4 / 9.5).to_s.should == "0.5684210526315789"
+      (8.4 / 4.9).to_s.should == "1.7142857142857142"
+      (1.7 / 3.5).to_s.should == "0.4857142857142857"
+      (1.2 / 5.1).to_s.should == "0.23529411764705882"
+      (1.4 / 2.0).to_s.should == "0.7"
+      (4.8 / 8.0).to_s.should == "0.6"
+      (9.0 / 2.5).to_s.should == "3.6"
+      (0.2 / 0.6).to_s.should == "0.33333333333333337"
+      (7.8 / 5.2).to_s.should == "1.5"
+      (9.5 / 5.5).to_s.should == "1.7272727272727273"
+    end
   end
 end