diff options
Diffstat (limited to 'spec/ruby/shared/math/atanh.rb')
-rw-r--r-- | spec/ruby/shared/math/atanh.rb | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/spec/ruby/shared/math/atanh.rb b/spec/ruby/shared/math/atanh.rb new file mode 100644 index 0000000000..1d1a6ebd74 --- /dev/null +++ b/spec/ruby/shared/math/atanh.rb @@ -0,0 +1,44 @@ +describe :math_atanh_base, shared: true do + it "returns a float" do + @object.send(@method, 0.5).should be_an_instance_of(Float) + end + + it "returns the inverse hyperbolic tangent of the argument" do + @object.send(@method, 0.0).should == 0.0 + @object.send(@method, -0.0).should == -0.0 + @object.send(@method, 0.5).should be_close(0.549306144334055, TOLERANCE) + @object.send(@method, -0.2).should be_close(-0.202732554054082, TOLERANCE) + end + + it "raises a TypeError if the argument is nil" do + lambda { @object.send(@method, nil) }.should raise_error(TypeError) + end + + it "raises a TypeError if the argument is not a Numeric" do + lambda { @object.send(@method, "test") }.should raise_error(TypeError) + end + + it "returns Infinity if x == 1.0" do + @object.send(@method, 1.0).should == Float::INFINITY + end + + it "return -Infinity if x == -1.0" do + @object.send(@method, -1.0).should == -Float::INFINITY + end +end + +describe :math_atanh_private, shared: true do + it "is a private instance method" do + Math.should have_private_instance_method(@method) + end +end + +describe :math_atanh_no_complex, shared: true do + it "raises a Math::DomainError for arguments greater than 1.0" do + lambda { @object.send(@method, 1.0 + Float::EPSILON) }.should raise_error(Math::DomainError) + end + + it "raises a Math::DomainError for arguments less than -1.0" do + lambda { @object.send(@method, -1.0 - Float::EPSILON) }.should raise_error(Math::DomainError) + end +end |