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
46
47
48
49
50
51
52
53
54
55
|
require File.dirname(__FILE__) + '/../../spec_helper'
require 'complex'
describe "Complex#/ with Complex" do
it "divides according to the usual rule for complex numbers" do
a = Complex((1 * 10) - (2 * 20), (1 * 20) + (2 * 10))
b = Complex(1, 2)
(a / b).should == Complex(10, 20)
c = Complex((1.5 * 100.2) - (2.1 * -30.3), (1.5 * -30.3) + (2.1 * 100.2))
d = Complex(1.5, 2.1)
# remember the floating-point arithmetic
(c / d).should be_close(Complex(100.2, -30.3), TOLERANCE)
end
end
describe "Complex#/ with Fixnum" do
it "divides both parts of the Complex number" do
(Complex(20, 40) / 2).should == Complex(10, 20)
(Complex(30, 30) / 10).should == Complex(3, 3)
end
it "raises a ZeroDivisionError when given zero" do
lambda { Complex(20, 40) / 0 }.should raise_error(ZeroDivisionError)
end
end
describe "Complex#/ with Bignum" do
it "divides both parts of the Complex number" do
(Complex(20, 40) / 2).should == Complex(10, 20)
(Complex(15, 16) / 2.0).should be_close(Complex(7.5, 8), TOLERANCE)
end
end
describe "Complex#/ with Float" do
it "divides both parts of the Complex number" do
(Complex(3, 9) / 1.5).should == Complex(2, 6)
(Complex(15, 16) / 2.0).should be_close(Complex(7.5, 8), TOLERANCE)
end
it "returns Complex(Infinity, Infinity) when given zero" do
(Complex(20, 40) / 0.0).inspect.should == "Complex(Infinity, Infinity)"
(Complex(-20, -40) / 0.0).inspect.should == "Complex(-Infinity, -Infinity)"
end
end
describe "Complex#/ with Object" do
it "tries to coerce self into other" do
value = Complex(3, 9)
obj = mock("Object")
obj.should_receive(:coerce).with(value).and_return([4, 2])
(value / obj).should == 2
end
end
|
