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
|
require_relative '../../spec_helper'
require_relative 'fixtures/classes'
describe "Math.acosh" do
it "returns a float" do
Math.acosh(1.0).should be_kind_of(Float)
end
it "returns the principle value of the inverse hyperbolic cosine of the argument" do
Math.acosh(14.2).should be_close(3.345146999647, TOLERANCE)
Math.acosh(1.0).should be_close(0.0, TOLERANCE)
end
it "raises Math::DomainError if the passed argument is less than -1.0 or greater than 1.0" do
-> { Math.acosh(1.0 - TOLERANCE) }.should raise_error(Math::DomainError)
-> { Math.acosh(0) }.should raise_error(Math::DomainError)
-> { Math.acosh(-1.0) }.should raise_error(Math::DomainError)
end
it "raises a TypeError if the argument cannot be coerced with Float()" do
-> { Math.acosh("test") }.should raise_error(TypeError)
end
it "returns NaN given NaN" do
Math.acosh(nan_value).nan?.should be_true
end
it "raises a TypeError if the argument is nil" do
-> { Math.acosh(nil) }.should raise_error(TypeError)
end
it "accepts any argument that can be coerced with Float()" do
Math.acosh(MathSpecs::Float.new).should == 0.0
end
end
describe "Math#acosh" do
it "is accessible as a private instance method" do
IncludesMath.new.send(:acosh, 1.0).should be_close(0.0, TOLERANCE)
end
end
|
