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Diffstat (limited to 'spec/ruby/core/integer/round_spec.rb')
-rw-r--r-- | spec/ruby/core/integer/round_spec.rb | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/spec/ruby/core/integer/round_spec.rb b/spec/ruby/core/integer/round_spec.rb new file mode 100644 index 0000000000..5cc9aa3881 --- /dev/null +++ b/spec/ruby/core/integer/round_spec.rb @@ -0,0 +1,77 @@ +require File.expand_path('../../../spec_helper', __FILE__) +require File.expand_path('../shared/to_i', __FILE__) + +describe "Integer#round" do + it_behaves_like(:integer_to_i, :round) + + ruby_version_is ""..."2.5" do + it "rounds itself as a float if passed a positive precision" do + [2, -4, 10**70, -10**100].each do |v| + v.round(42).should eql(v.to_f) + end + end + end + + ruby_version_is "2.5" do + it "returns itself if passed a positive precision" do + [2, -4, 10**70, -10**100].each do |v| + v.round(42).should eql(v) + end + end + end + + it "returns itself if passed zero" do + [2, -4, 10**70, -10**100].each do |v| + v.round(0).should eql(v) + end + end + + # redmine:5228 + it "returns itself rounded if passed a negative value" do + +249.round(-2).should eql(+200) + -249.round(-2).should eql(-200) + (+25 * 10**70 - 1).round(-71).should eql(+20 * 10**70) + (-25 * 10**70 + 1).round(-71).should eql(-20 * 10**70) + end + + it "returns itself rounded to nearest if passed a negative value" do + +250.round(-2).should eql(+300) + -250.round(-2).should eql(-300) + (+25 * 10**70).round(-71).should eql(+30 * 10**70) + (-25 * 10**70).round(-71).should eql(-30 * 10**70) + end + + platform_is_not wordsize: 32 do + it "raises a RangeError when passed a big negative value" do + lambda { 42.round(fixnum_min) }.should raise_error(RangeError) + end + end + + it "raises a RangeError when passed Float::INFINITY" do + lambda { 42.round(Float::INFINITY) }.should raise_error(RangeError) + end + + it "raises a RangeError when passed a beyond signed int" do + lambda { 42.round(1<<31) }.should raise_error(RangeError) + end + + it "raises a TypeError when passed a String" do + lambda { 42.round("4") }.should raise_error(TypeError) + end + + it "raises a TypeError when its argument cannot be converted to an Integer" do + lambda { 42.round(nil) }.should raise_error(TypeError) + end + + it "calls #to_int on the argument to convert it to an Integer" do + obj = mock("Object") + obj.should_receive(:to_int).and_return(0) + 42.round(obj) + end + + it "raises a TypeError when #to_int does not return an Integer" do + obj = mock("Object") + obj.stub!(:to_int).and_return([]) + lambda { 42.round(obj) }.should raise_error(TypeError) + end +end |