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
|
require "spec_helper"
require "hamster/vector"
describe Hamster::Vector do
[:map, :collect].each do |method|
describe "##{method}" do
context "when empty" do
let(:vector) { V.empty }
it "returns self" do
vector.send(method) {}.should equal(vector)
end
end
context "when not empty" do
let(:vector) { V["A", "B", "C"] }
context "with a block" do
it "preserves the original values" do
vector.send(method, &:downcase)
vector.should eql(V["A", "B", "C"])
end
it "returns a new vector with the mapped values" do
vector.send(method, &:downcase).should eql(V["a", "b", "c"])
end
end
context "with no block" do
it "returns an Enumerator" do
vector.send(method).class.should be(Enumerator)
vector.send(method).each(&:downcase).should eql(V['a', 'b', 'c'])
end
end
end
context "from a subclass" do
it "returns an instance of the subclass" do
subclass = Class.new(Hamster::Vector)
instance = subclass[1,2,3]
instance.map { |x| x + 1 }.class.should be(subclass)
end
end
context "on a large vector" do
it "works" do
V.new(1..2000).map { |x| x * 2 }.should eql(V.new((1..2000).map { |x| x * 2}))
end
end
end
end
end
|
