blob: 7cd3781d343e0e67eeafc5454f1960f607a6460b (
plain)
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
|
require File.expand_path('../../../spec_helper', __FILE__)
require File.expand_path('../shared/begin', __FILE__)
describe "Range#first" do
it_behaves_like(:range_begin, :first)
it "returns the specified number of elements from the beginning" do
(0..2).first(2).should == [0, 1]
end
it "returns an empty array for an empty Range" do
(0...0).first(2).should == []
end
it "returns an empty array when passed zero" do
(0..2).first(0).should == []
end
it "returns all elements in the range when count exceeds the number of elements" do
(0..2).first(4).should == [0, 1, 2]
end
it "raises an ArgumentError when count is negative" do
lambda { (0..2).first(-1) }.should raise_error(ArgumentError)
end
it "calls #to_int to convert the argument" do
obj = mock_int(2)
(3..7).first(obj).should == [3, 4]
end
it "raises a TypeError if #to_int does not return an Integer" do
obj = mock("to_int")
obj.should_receive(:to_int).and_return("1")
lambda { (2..3).first(obj) }.should raise_error(TypeError)
end
it "truncates the value when passed a Float" do
(2..9).first(2.8).should == [2, 3]
end
it "raises a TypeError when passed nil" do
lambda { (2..3).first(nil) }.should raise_error(TypeError)
end
it "raises a TypeError when passed a String" do
lambda { (2..3).first("1") }.should raise_error(TypeError)
end
end
|
