mirror of
https://github.com/ruby/ruby.git
synced 2022-11-09 12:17:21 -05:00
95e8c48dd3
* For easier modifications of ruby/spec by MRI developers. * .gitignore: track changes under spec. * spec/mspec, spec/rubyspec: add in-tree mspec and ruby/spec. These files can therefore be updated like any other file in MRI. Instructions are provided in spec/README. [Feature #13156] [ruby-core:79246] git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58595 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
43 lines
1.5 KiB
Ruby
43 lines
1.5 KiB
Ruby
require File.expand_path('../../../spec_helper', __FILE__)
|
|
require File.expand_path('../fixtures/classes', __FILE__)
|
|
|
|
# erfc is the complementary error function
|
|
describe "Math.erfc" do
|
|
it "returns a float" do
|
|
Math.erf(1).should be_kind_of(Float)
|
|
end
|
|
|
|
it "returns the complementary error function of the argument" do
|
|
Math.erfc(0).should be_close(1.0, TOLERANCE)
|
|
Math.erfc(1).should be_close(0.157299207050285, TOLERANCE)
|
|
Math.erfc(-1).should be_close(1.84270079294971, TOLERANCE)
|
|
Math.erfc(0.5).should be_close(0.479500122186953, TOLERANCE)
|
|
Math.erfc(-0.5).should be_close(1.52049987781305, TOLERANCE)
|
|
Math.erfc(10000).should be_close(0.0, TOLERANCE)
|
|
Math.erfc(-10000).should be_close(2.0, TOLERANCE)
|
|
Math.erfc(0.00000000000001).should be_close(0.999999999999989, TOLERANCE)
|
|
Math.erfc(-0.00000000000001).should be_close(1.00000000000001, TOLERANCE)
|
|
end
|
|
|
|
it "raises a TypeError if the argument cannot be coerced with Float()" do
|
|
lambda { Math.erfc("test") }.should raise_error(TypeError)
|
|
end
|
|
|
|
it "returns NaN given NaN" do
|
|
Math.erfc(nan_value).nan?.should be_true
|
|
end
|
|
|
|
it "raises a TypeError if the argument is nil" do
|
|
lambda { Math.erfc(nil) }.should raise_error(TypeError)
|
|
end
|
|
|
|
it "accepts any argument that can be coerced with Float()" do
|
|
Math.erfc(MathSpecs::Float.new).should be_close(0.157299207050285, TOLERANCE)
|
|
end
|
|
end
|
|
|
|
describe "Math#erfc" do
|
|
it "is accessible as a private instance method" do
|
|
IncludesMath.new.send(:erf, 3.1415).should be_close(0.999991118444483, TOLERANCE)
|
|
end
|
|
end
|