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Diffstat (limited to 'spec/ruby/shared/complex/numeric/polar.rb')
-rw-r--r-- | spec/ruby/shared/complex/numeric/polar.rb | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/spec/ruby/shared/complex/numeric/polar.rb b/spec/ruby/shared/complex/numeric/polar.rb new file mode 100644 index 0000000000..952b65c1b6 --- /dev/null +++ b/spec/ruby/shared/complex/numeric/polar.rb @@ -0,0 +1,50 @@ +require File.expand_path('../../../../spec_helper', __FILE__) + +describe :numeric_polar, shared: true do + before :each do + @pos_numbers = [ + 1, + 3898172610**9, + 987.18273, + Float::MAX, + Rational(13,7), + infinity_value, + ] + @neg_numbers = @pos_numbers.map {|n| -n} + @numbers = @pos_numbers + @neg_numbers + @numbers.push(0, 0.0) + end + + it "returns a two-element Array" do + @numbers.each do |number| + number.polar.should be_an_instance_of(Array) + number.polar.size.should == 2 + end + end + + it "sets the first value to the absolute value of self" do + @numbers.each do |number| + number.polar.first.should == number.abs + end + end + + it "sets the last value to 0 if self is positive" do + (@numbers - @neg_numbers).each do |number| + number.should >= 0 + number.polar.last.should == 0 + end + end + + it "sets the last value to Pi if self is negative" do + @neg_numbers.each do |number| + number.should < 0 + number.polar.last.should == Math::PI + end + end + + it "returns [NaN, NaN] if self is NaN" do + nan_value.polar.size.should == 2 + nan_value.polar.first.nan?.should be_true + nan_value.polar.last.nan?.should be_true + end +end |