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
|
require_relative '../../spec_helper'
describe "Float#rationalize" do
it "returns self as a simplified Rational with no argument" do
(3382729202.92822).rationalize.should == Rational(4806858197361, 1421)
end
# FIXME: These specs need reviewing by somebody familiar with the
# algorithm used by #rationalize
it "simplifies self to the degree specified by a Rational argument" do
f = 0.3
f.rationalize(Rational(1,10)).should == Rational(1,3)
f.rationalize(Rational(-1,10)).should == Rational(1,3)
f = -f
f.rationalize(Rational(1,10)).should == Rational(-1,3)
f.rationalize(Rational(-1,10)).should == Rational(-1,3)
end
it "simplifies self to the degree specified by a Float argument" do
f = 0.3
f.rationalize(0.05).should == Rational(1,3)
f.rationalize(0.001).should == Rational(3, 10)
f = -f
f.rationalize(0.05).should == Rational(-1,3)
f.rationalize(0.001).should == Rational(-3,10)
end
it "raises a FloatDomainError for Infinity" do
-> {infinity_value.rationalize}.should raise_error(FloatDomainError)
end
it "raises a FloatDomainError for NaN" do
-> { nan_value.rationalize }.should raise_error(FloatDomainError)
end
it "raises ArgumentError when passed more than one argument" do
-> { 0.3.rationalize(0.1, 0.1) }.should raise_error(ArgumentError)
-> { 0.3.rationalize(0.1, 0.1, 2) }.should raise_error(ArgumentError)
end
end
|