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 "spec_helper"
require "hamster/hash"
describe Hamster::Hash do
let(:hash) { H.new("A" => "aye", "B" => "bee", "C" => "see", nil => "NIL") }
describe "#slice" do
let(:slice) { hash.slice(*values) }
context "with all keys present in the Hash" do
let(:values) { ["B", nil] }
it "returns the sliced values" do
expect(slice).to eq(described_class.new("B" => "bee", nil => "NIL"))
end
it "doesn't modify the original Hash" do
slice
hash.should eql(H.new("A" => "aye", "B" => "bee", "C" => "see", nil => "NIL"))
end
end
context "with keys aren't present in the Hash" do
let(:values) { ["B", "A", 3] }
it "returns the sliced values of the matching keys" do
expect(slice).to eq(described_class.new("A" => "aye", "B" => "bee"))
end
it "doesn't modify the original Hash" do
slice
hash.should eql(H.new("A" => "aye", "B" => "bee", "C" => "see", nil => "NIL"))
end
end
context "on a Hash with a default block" do
let(:hash) { H.new('A' => 'aye', 'B' => 'bee') { 'nothing' }}
let(:values) { ["B", nil] }
it "maintains the default block" do
expect(slice['C']).to eq('nothing')
end
end
end
end
|
