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Contents
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 "1.9" 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
it "returns itself if passed zero" do
[2, -4, 10**70, -10**100].each do |v|
v.round(0).should eql(v)
end
end
ruby_bug "redmine:5228", "1.9.2" do
it "returns itself rounded if passed a negative value" do
+249.round(-2).should eql(+200)
+250.round(-2).should eql(+300)
-249.round(-2).should eql(-200)
-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)
(+25 * 10**70 - 1).round(-71).should eql(+20 * 10**70)
(-25 * 10**70 + 1).round(-71).should eql(-20 * 10**70)
end
end
it "raises a TypeError when its argument can not be converted to an Integer" do
lambda { 42.round("4") }.should raise_error(TypeError)
lambda { 42.round(nil) }.should raise_error(TypeError)
end
end
end
Version data entries
52 entries across 52 versions & 2 rubygems