mirror of
https://github.com/ruby/ruby.git
synced 2022-11-09 12:17:21 -05:00
1d15d5f080
* Other ruby implementations use the spec/ruby directory. [Misc #13792] [ruby-core:82287] git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59979 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
58 lines
1.8 KiB
Ruby
58 lines
1.8 KiB
Ruby
require File.expand_path('../../../spec_helper', __FILE__)
|
|
require File.expand_path('../fixtures/classes', __FILE__)
|
|
|
|
# arccosine : (-1.0, 1.0) --> (0, PI)
|
|
describe "Math.acos" do
|
|
before :each do
|
|
ScratchPad.clear
|
|
end
|
|
|
|
it "returns a float" do
|
|
Math.acos(1).should be_kind_of(Float )
|
|
end
|
|
|
|
it "returns the arccosine of the argument" do
|
|
Math.acos(1).should be_close(0.0, TOLERANCE)
|
|
Math.acos(0).should be_close(1.5707963267949, TOLERANCE)
|
|
Math.acos(-1).should be_close(Math::PI,TOLERANCE)
|
|
Math.acos(0.25).should be_close(1.31811607165282, TOLERANCE)
|
|
Math.acos(0.50).should be_close(1.0471975511966 , TOLERANCE)
|
|
Math.acos(0.75).should be_close(0.722734247813416, TOLERANCE)
|
|
end
|
|
|
|
conflicts_with :Complex do
|
|
it "raises an Errno::EDOM if the argument is greater than 1.0" do
|
|
lambda { Math.acos(1.0001) }.should raise_error(Errno::EDOM)
|
|
end
|
|
|
|
it "raises an Errno::EDOM if the argument is less than -1.0" do
|
|
lambda { Math.acos(-1.0001) }.should raise_error(Errno::EDOM)
|
|
end
|
|
end
|
|
|
|
it "raises a TypeError if the string argument cannot be coerced with Float()" do
|
|
lambda { Math.acos("test") }.should raise_error(TypeError)
|
|
end
|
|
|
|
it "returns NaN given NaN" do
|
|
Math.acos(nan_value).nan?.should be_true
|
|
end
|
|
|
|
it "raises a TypeError if the argument cannot be coerced with Float()" do
|
|
lambda { Math.acos(MathSpecs::UserClass.new) }.should raise_error(TypeError)
|
|
end
|
|
|
|
it "raises a TypeError if the argument is nil" do
|
|
lambda { Math.acos(nil) }.should raise_error(TypeError)
|
|
end
|
|
|
|
it "accepts any argument that can be coerced with Float()" do
|
|
Math.acos(MathSpecs::Float.new(0.5)).should be_close(Math.acos(0.5), TOLERANCE)
|
|
end
|
|
end
|
|
|
|
describe "Math#acos" do
|
|
it "is accessible as a private instance method" do
|
|
IncludesMath.new.send(:acos, 0).should be_close(1.5707963267949, TOLERANCE)
|
|
end
|
|
end
|