1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
|
require File.expand_path('../../../spec_helper', __FILE__)
require File.expand_path('../fixtures/classes', __FILE__)
describe "Math.cosh" do
it "returns a float" do
Math.cosh(1.0).should be_kind_of(Float)
end
it "returns the hyperbolic cosine of the argument" do
Math.cosh(0.0).should == 1.0
Math.cosh(-0.0).should == 1.0
Math.cosh(1.5).should be_close(2.35240961524325, TOLERANCE)
Math.cosh(-2.99).should be_close(9.96798496414416, TOLERANCE)
end
ruby_version_is ""..."1.9" do
it "raises an ArgumentError if the argument cannot be coerced with Float()" do
lambda { Math.cosh("test") }.should raise_error(ArgumentError)
end
end
ruby_version_is "1.9" do
it "raises a TypeError if the argument cannot be coerced with Float()" do
lambda { Math.cosh("test") }.should raise_error(TypeError)
end
end
it "returns NaN given NaN" do
Math.cosh(nan_value).nan?.should be_true
end
it "raises a TypeError if the argument is nil" do
lambda { Math.cosh(nil) }.should raise_error(TypeError)
end
it "accepts any argument that can be coerced with Float()" do
Math.cosh(MathSpecs::Float.new).should be_close(1.54308063481524, TOLERANCE)
end
end
describe "Math#cosh" do
it "is accessible as a private instance method" do
IncludesMath.new.send(:cos, 3.1415).should be_close(-0.999999995707656, TOLERANCE)
end
end
|
