diff options
Diffstat (limited to 'spec/ruby/library/mathn/math/shared/rsqrt.rb')
| -rw-r--r-- | spec/ruby/library/mathn/math/shared/rsqrt.rb | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/spec/ruby/library/mathn/math/shared/rsqrt.rb b/spec/ruby/library/mathn/math/shared/rsqrt.rb new file mode 100644 index 0000000000..68e2f7d02f --- /dev/null +++ b/spec/ruby/library/mathn/math/shared/rsqrt.rb @@ -0,0 +1,21 @@ +require 'mathn' +require File.expand_path('../../fixtures/classes', __FILE__) + +describe :mathn_math_rsqrt, shared: true do + it "returns the square root for Rational numbers" do + @object.send(:rsqrt, Rational(9, 25)).should == Rational(3, 5) + @object.send(:rsqrt, 16/64).should == Rational(1, 2) + end + + it "returns the square root for positive numbers" do + @object.send(:rsqrt, 1).should == 1 + @object.send(:rsqrt, 4.0).should == 2.0 + @object.send(:rsqrt, 12.34).should == Math.sqrt!(12.34) + end + + it "raises an Math::DomainError if the argument is a negative number" do + lambda { @object.send(:rsqrt, -1) }.should raise_error(Math::DomainError) + lambda { @object.send(:rsqrt, -4.0) }.should raise_error(Math::DomainError) + lambda { @object.send(:rsqrt, -16/64) }.should raise_error(Math::DomainError) + end +end |