summaryrefslogtreecommitdiff
path: root/spec/ruby/core/comparable/lte_spec.rb
blob: baf2c572293ab9eea9fa72d5b52207eb18c018cd (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
require_relative '../../spec_helper'
require_relative 'fixtures/classes'

describe "Comparable#<=" do
  it "calls #<=> on self with other and returns true if #<=> returns 0 or any Integer less than 0" do
    a = ComparableSpecs::Weird.new(0)
    b = ComparableSpecs::Weird.new(20)

    a.should_receive(:<=>).any_number_of_times.and_return(0)
    (a <= b).should == true

    a.should_receive(:<=>).any_number_of_times.and_return(0.0)
    (a <= b).should == true

    a.should_receive(:<=>).any_number_of_times.and_return(-1)
    (a <= b).should == true

    a.should_receive(:<=>).any_number_of_times.and_return(-0.1)
    (a <= b).should == true

    a.should_receive(:<=>).any_number_of_times.and_return(-10000000)
    (a <= b).should == true
  end

  it "returns false if calling #<=> on self returns any Integer greater than 0" do
    a = ComparableSpecs::Weird.new(0)
    b = ComparableSpecs::Weird.new(10)

    a.should_receive(:<=>).any_number_of_times.and_return(0.1)
    (a <= b).should == false

    a.should_receive(:<=>).any_number_of_times.and_return(1.0)
    (a <= b).should == false

    a.should_receive(:<=>).any_number_of_times.and_return(10000000)
    (a <= b).should == false
  end

  it "raises an ArgumentError if calling #<=> on self returns nil" do
    a = ComparableSpecs::Weird.new(0)
    b = ComparableSpecs::Weird.new(20)

    a.should_receive(:<=>).any_number_of_times.and_return(nil)
    lambda { (a <= b) }.should raise_error(ArgumentError)
  end
end