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
42 lines
1.3 KiB
Ruby
42 lines
1.3 KiB
Ruby
require File.expand_path('../../../spec_helper', __FILE__)
|
|
require File.expand_path('../fixtures/classes', __FILE__)
|
|
|
|
describe "Math.tan" do
|
|
it "returns a float" do
|
|
Math.tan(1.35).should be_kind_of(Float)
|
|
end
|
|
|
|
it "returns the tangent of the argument" do
|
|
Math.tan(0.0).should == 0.0
|
|
Math.tan(-0.0).should == -0.0
|
|
Math.tan(4.22).should be_close(1.86406937682395, TOLERANCE)
|
|
Math.tan(-9.65).should be_close(-0.229109052606441, TOLERANCE)
|
|
end
|
|
|
|
it "returns NaN if called with +-Infinitty" do
|
|
Math.tan(infinity_value).nan?.should == true
|
|
Math.tan(-infinity_value).nan?.should == true
|
|
end
|
|
|
|
it "raises a TypeError if the argument cannot be coerced with Float()" do
|
|
lambda { Math.tan("test") }.should raise_error(TypeError)
|
|
end
|
|
|
|
it "returns NaN given NaN" do
|
|
Math.tan(nan_value).nan?.should be_true
|
|
end
|
|
|
|
it "raises a TypeError if the argument is nil" do
|
|
lambda { Math.tan(nil) }.should raise_error(TypeError)
|
|
end
|
|
|
|
it "accepts any argument that can be coerced with Float()" do
|
|
Math.tan(MathSpecs::Float.new).should be_close(1.5574077246549, TOLERANCE)
|
|
end
|
|
end
|
|
|
|
describe "Math#tan" do
|
|
it "is accessible as a private instance method" do
|
|
IncludesMath.new.send(:tan, 1.0).should be_close(1.5574077246549, TOLERANCE)
|
|
end
|
|
end
|