diff options
| author | eregon <eregon@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2017-09-20 20:18:52 +0000 |
|---|---|---|
| committer | eregon <eregon@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2017-09-20 20:18:52 +0000 |
| commit | 1d15d5f08032acf1b7bceacbb450d617ff6e0931 (patch) | |
| tree | a3785a79899302bc149e4a6e72f624ac27dc1f10 /spec/ruby/shared/rational/round.rb | |
| parent | 75bfc6440d595bf339007f4fb280fd4d743e89c1 (diff) | |
Move spec/rubyspec to spec/ruby for consistency
* Other ruby implementations use the spec/ruby directory.
[Misc #13792] [ruby-core:82287]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59979 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'spec/ruby/shared/rational/round.rb')
| -rw-r--r-- | spec/ruby/shared/rational/round.rb | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/spec/ruby/shared/rational/round.rb b/spec/ruby/shared/rational/round.rb new file mode 100644 index 0000000000..8874daceea --- /dev/null +++ b/spec/ruby/shared/rational/round.rb @@ -0,0 +1,71 @@ +require File.expand_path('../../../spec_helper', __FILE__) + +describe :rational_round, shared: true do + before do + @rational = Rational(2200, 7) + end + + describe "with no arguments (precision = 0)" do + it "returns an integer" do + @rational.round.should be_kind_of(Integer) + Rational(0, 1).round(0).should be_kind_of(Integer) + Rational(124, 1).round(0).should be_kind_of(Integer) + end + + it "returns the truncated value toward the nearest integer" do + @rational.round.should == 314 + Rational(0, 1).round(0).should == 0 + Rational(2, 1).round(0).should == 2 + end + + it "returns the rounded value toward the nearest integer" do + Rational(1, 2).round.should == 1 + Rational(-1, 2).round.should == -1 + Rational(3, 2).round.should == 2 + Rational(-3, 2).round.should == -2 + Rational(5, 2).round.should == 3 + Rational(-5, 2).round.should == -3 + end + end + + describe "with a precision < 0" do + it "returns an integer" do + @rational.round(-2).should be_kind_of(Integer) + @rational.round(-1).should be_kind_of(Integer) + Rational(0, 1).round(-1).should be_kind_of(Integer) + Rational(2, 1).round(-1).should be_kind_of(Integer) + end + + it "moves the truncation point n decimal places left" do + @rational.round(-3).should == 0 + @rational.round(-2).should == 300 + @rational.round(-1).should == 310 + end + end + + describe "with a precision > 0" do + it "returns a Rational" do + @rational.round(1).should be_kind_of(Rational) + @rational.round(2).should be_kind_of(Rational) + Rational(0, 1).round(1).should be_kind_of(Rational) + Rational(2, 1).round(1).should be_kind_of(Rational) + end + + it "moves the truncation point n decimal places right" do + @rational.round(1).should == Rational(3143, 10) + @rational.round(2).should == Rational(31429, 100) + @rational.round(3).should == Rational(157143, 500) + Rational(0, 1).round(1).should == Rational(0, 1) + Rational(2, 1).round(1).should == Rational(2, 1) + end + + it "doesn't alter the value if the precision is too great" do + Rational(3, 2).round(10).should == Rational(3, 2).round(20) + end + + # #6605 + it "doesn't fail when rounding to an absurdly large positive precision" do + Rational(3, 2).round(2_097_171).should == Rational(3, 2) + end + end +end |