spec/erd_handler/box_spec.rb

   1 require 'spec_helper'
   2
   3 module ErdHandler
   4   describe Box do
   5     # Needed as RSpec includes the Psych YAML reader, which defines :y as
   6     # a method for generating YAML of an object.
   7     class Box
   8       undef_method :y
   9     end
  10
  11     describe "#contains?" do
  12       it "reports when a box contains another" do
  13         b1 = Box.new
  14         b1.x = 10 ; b1.y = 10 ; b1.width = 20 ; b1.height = 20
  15         b2 = Box.new ; b2.x =  5 ; b2.y =  5 ; b2.width = 30 ; b2.height = 30
  16         b3 = Box.new ; b3.x = 15 ; b3.y = 15 ; b3.width = 20 ; b3.height = 20
  17
  18         b1.should_not be_contains(b2)
  19         b2.should be_contains(b1)
  20         b1.should_not be_contains(b3)
  21         b3.should_not be_contains(b1)
  22       end
  23     end # contains?
  24
  25     describe "#within?" do
  26       it "reports when a box is within another" do
  27         b1 = Box.new
  28         b1.x = 10 ; b1.y = 10 ; b1.width = 20 ; b1.height = 20
  29         b2 = Box.new ; b2.x =  5 ; b2.y =  5 ; b2.width = 30 ; b2.height = 30
  30         b3 = Box.new ; b3.x = 15 ; b3.y = 15 ; b3.width = 20 ; b3.height = 20
  31
  32         # Can't use the standard RSpec predicate notation as it clashes with
  33         # floating-point expectations
  34         b1.within?(b2).should == true
  35         b2.within?(b1).should == false
  36         b1.within?(b3).should == false
  37         b3.within?(b1).should == false
  38       end
  39     end # within?
  40
  41     describe "#similarity" do
  42       it "find the similarity of two boxes" do
  43         b1 = Box.new
  44         b1.name = Label.new "box 1", true
  45         b2 = Box.new
  46         b2.name = Label.new "box 2", true
  47         b1.similarity(b2).should be_within(0.005).of(0.75)
  48       end
  49     end
  50
  51   end
  52 end