test/test_dependency_graph.rb

   1 require File.dirname(__FILE__) + '/helper'
   2
   3 class TestDependencyGraph < Test::Unit::TestCase
   4   def setup
   5     @dg = DependencyGraph.new
   6   end
   7
   8   # new
   9
  10   def test_new_should_accept_zero_arguments
  11     assert @dg.instance_of?(DependencyGraph)
  12   end
  13
  14   # add
  15
  16   def test_add_should_create_and_store_two_new_nodes
  17     @dg.add('foo', 'bar')
  18     assert_equal 2, @dg.nodes.size
  19     assert @dg.nodes['foo'].instance_of?(DependencyGraph::Node)
  20     assert @dg.nodes['bar'].instance_of?(DependencyGraph::Node)
  21   end
  22
  23   def test_add_should_record_dependency
  24     @dg.add('foo', 'bar')
  25     assert_equal 1, @dg.nodes['foo'].dependencies.size
  26     assert_equal @dg.nodes['bar'], @dg.nodes['foo'].dependencies.first
  27   end
  28
  29   def test_add_should_ignore_dups
  30     @dg.add('foo', 'bar')
  31     @dg.add('foo', 'bar')
  32     assert_equal 2, @dg.nodes.size
  33     assert_equal 1, @dg.nodes['foo'].dependencies.size
  34   end
  35 end
  36
  37
  38 class TestDependencyGraphNode < Test::Unit::TestCase
  39   def setup
  40     @foo = DependencyGraph::Node.new('foo')
  41     @bar = DependencyGraph::Node.new('bar')
  42   end
  43
  44   # new
  45
  46   def test_new_should_accept_zero_arguments
  47     assert @foo.instance_of?(DependencyGraph::Node)
  48   end
  49
  50   # add
  51
  52   def test_add_should_store_node_as_dependency
  53     @foo.add(@bar)
  54     assert_equal 1, @foo.dependencies.size
  55   end
  56
  57   # has_node?
  58
  59   def test_has_node
  60     assert @foo.has_node?(@foo)
  61   end
  62 end