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require File.dirname(__FILE__) + '/helper'
class TestDependencyGraph < Test::Unit::TestCase
def setup
@dg = DependencyGraph.new
end
# new
def test_new_should_accept_zero_arguments
assert @dg.instance_of?(DependencyGraph)
end
# add
def test_add_should_create_and_store_two_new_nodes
@dg.add('foo', 'bar')
assert_equal 2, @dg.nodes.size
assert @dg.nodes['foo'].instance_of?(DependencyGraph::Node)
assert @dg.nodes['bar'].instance_of?(DependencyGraph::Node)
end
def test_add_should_record_dependency
@dg.add('foo', 'bar')
assert_equal 1, @dg.nodes['foo'].dependencies.size
assert_equal @dg.nodes['bar'], @dg.nodes['foo'].dependencies.first
end
def test_add_should_ignore_dups
@dg.add('foo', 'bar')
@dg.add('foo', 'bar')
assert_equal 2, @dg.nodes.size
assert_equal 1, @dg.nodes['foo'].dependencies.size
end
end
class TestDependencyGraphNode < Test::Unit::TestCase
def setup
@foo = DependencyGraph::Node.new('foo')
@bar = DependencyGraph::Node.new('bar')
end
# new
def test_new_should_accept_zero_arguments
assert @foo.instance_of?(DependencyGraph::Node)
end
# add
def test_add_should_store_node_as_dependency
@foo.add(@bar)
assert_equal 1, @foo.dependencies.size
end
# has_node?
def test_has_node
assert @foo.has_node?(@foo)
end
end
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