1 files changed, 51 insertions, 0 deletions
diff --git a/spec/ruby/core/integer/fdiv_spec.rb b/spec/ruby/core/integer/fdiv_spec.rb
index 6de170278f..d9ea2fdf8d 100644
--- a/spec/ruby/core/integer/fdiv_spec.rb
+++ b/spec/ruby/core/integer/fdiv_spec.rb
@@ -9,6 +9,57 @@ describe "Integer#fdiv" do
     8.fdiv(bignum_value).should be_close(8.673617379884035e-19, TOLERANCE)
   end
 
+  it "performs floating-point division between self bignum and a bignum" do
+    num = 1000000000000000000000000000000000048148248609680896326399448564623182963452541226153892315137780403285956264146010000000000000000000000000000000000048148248609680896326399448564623182963452541226153892315137780403285956264146010000000000000000000000000000000000048148248609680896326399448564623182963452541226153892315137780403285956264146009
+    den = 2000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
+    num.fdiv(den).should == 500.0
+  end
+
+  it "rounds to the correct value for bignums" do
+    den = 9 * 10**342
+
+    num = 1 * 10**344
+    num.fdiv(den).should == 11.11111111111111
+
+    num = 1 * 10**343
+    num.fdiv(den).should == 1.1111111111111112
+
+    num = 1 * 10**342
+    num.fdiv(den).should == 0.1111111111111111
+
+    num = 2 * 10**342
+    num.fdiv(den).should == 0.2222222222222222
+
+    num = 3 * 10**342
+    num.fdiv(den).should == 0.3333333333333333
+
+    num = 4 * 10**342
+    num.fdiv(den).should == 0.4444444444444444
+
+    num = 5 * 10**342
+    num.fdiv(den).should == 0.5555555555555556
+
+    num = 6 * 10**342
+    num.fdiv(den).should == 0.6666666666666666
+
+    num = 7 * 10**342
+    num.fdiv(den).should == 0.7777777777777778
+
+    num = 8 * 10**342
+    num.fdiv(den).should == 0.8888888888888888
+
+    num = 9 * 10**342
+    num.fdiv(den).should == 1.0
+
+    num = -5 * 10**342
+    num.fdiv(den).should == -0.5555555555555556
+  end
+
+  it "rounds to the correct float for bignum denominators" do
+    1.fdiv(10**324).should == 0.0
+    1.fdiv(10**323).should == 1.0e-323
+  end
+
   it "performs floating-point division between self and a Float" do
     8.fdiv(9.0).should be_close(0.888888888888889, TOLERANCE)
   end