diff options
Diffstat (limited to 'spec/ruby/core/float/exponent_spec.rb')
-rw-r--r-- | spec/ruby/core/float/exponent_spec.rb | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/spec/ruby/core/float/exponent_spec.rb b/spec/ruby/core/float/exponent_spec.rb new file mode 100644 index 0000000000..5cbba43a27 --- /dev/null +++ b/spec/ruby/core/float/exponent_spec.rb @@ -0,0 +1,15 @@ +require File.expand_path('../../../spec_helper', __FILE__) + +describe "Float#**" do + it "returns self raise to the other power" do + (2.3 ** 3).should be_close(12.167,TOLERANCE) + (5.2 ** -1).should be_close(0.192307692307692,TOLERANCE) + (9.5 ** 0.5).should be_close(3.08220700148449, TOLERANCE) + (9.5 ** 0xffffffff).to_s.should == 'Infinity' + end + + it "returns a complex number when negative and raised to a fractional power" do + ((-8.0) ** (1.0/3)) .should be_close(Complex(1, 1.73205), TOLERANCE) + ((-8.0) ** Rational(1,3)).should be_close(Complex(1, 1.73205), TOLERANCE) + end +end |