#!/usr/bin/env ruby

require 'test/unit'
require 'rake'

class TaskManager
  include Rake::TaskManager
end

class TestTaskManager < Test::Unit::TestCase
  def setup
    @tm = TaskManager.new
  end

  def test_create_task_manager
    assert_not_nil @tm
    assert_equal [], @tm.tasks
  end

  def test_define_task
    t = @tm.define_task(Rake::Task, :t)
    assert_equal "t", t.name
    assert_equal @tm, t.application
  end

  def test_name_lookup
    t = @tm.define_task(Rake::Task, :t)
    assert_equal t, @tm[:t]
  end

  def test_namespace_task_create
    @tm.in_namespace("x") do
      t = @tm.define_task(Rake::Task, :t)
      assert_equal "x:t", t.name
    end
    assert_equal ["x:t"], @tm.tasks.collect { |t| t.name }
  end

  def test_anonymous_namespace
    anon_ns = @tm.in_namespace(nil) do
      t = @tm.define_task(Rake::Task, :t)
      assert_equal "_anon_1:t", t.name
    end
    task = anon_ns[:t]
    assert_equal "_anon_1:t", task.name
  end

  def test_create_filetask_in_namespace
    @tm.in_namespace("x") do
      t = @tm.define_task(Rake::FileTask, "fn")
      assert_equal "fn", t.name
    end
    assert_equal ["fn"], @tm.tasks.collect { |t| t.name }
  end

  def testS_namespace_yields_same_namespace_as_returned
    yielded_namespace = nil
    returned_namespace = @tm.in_namespace("x") do |ns|
      yielded_namespace = ns
    end
    assert_equal returned_namespace, yielded_namespace
  end

  def test_name_lookup_with_implicit_file_tasks
    t = @tm["README"]
    assert_equal "README", t.name
    assert Rake::FileTask === t
  end

  def test_name_lookup_with_nonexistent_task
    assert_raise(RuntimeError) {
      t = @tm["DOES NOT EXIST"]
    }
  end

  def test_name_lookup_in_multiple_scopes
    aa = nil
    bb = nil
    xx = @tm.define_task(Rake::Task, :xx)
    top_z = @tm.define_task(Rake::Task, :z)
    @tm.in_namespace("a") do
      aa = @tm.define_task(Rake::Task, :aa)
      mid_z = @tm.define_task(Rake::Task, :z)
      @tm.in_namespace("b") do
        bb = @tm.define_task(Rake::Task, :bb)
        bot_z = @tm.define_task(Rake::Task, :z)

        assert_equal ["a", "b"], @tm.current_scope

        assert_equal bb, @tm["a:b:bb"]
        assert_equal aa, @tm["a:aa"]
        assert_equal xx, @tm["xx"]
        assert_equal bot_z, @tm["z"]
        assert_equal mid_z, @tm["^z"]
        assert_equal top_z, @tm["^^z"]
        assert_equal top_z, @tm["rake:z"]
      end

      assert_equal ["a"], @tm.current_scope

      assert_equal bb, @tm["a:b:bb"]
      assert_equal aa, @tm["a:aa"]
      assert_equal xx, @tm["xx"]
      assert_equal bb, @tm["b:bb"]
      assert_equal aa, @tm["aa"]
      assert_equal mid_z, @tm["z"]
      assert_equal top_z, @tm["^z"]
      assert_equal top_z, @tm["rake:z"]
    end

    assert_equal [], @tm.current_scope

    assert_equal [], xx.scope
    assert_equal ['a'], aa.scope
    assert_equal ['a', 'b'], bb.scope
  end

  def test_lookup_with_explicit_scopes
    t1, t2, t3, s = (0...4).collect { nil }
    t1 = @tm.define_task(Rake::Task, :t)
    @tm.in_namespace("a") do
      t2 = @tm.define_task(Rake::Task, :t)
      s =  @tm.define_task(Rake::Task, :s)
      @tm.in_namespace("b") do
        t3 = @tm.define_task(Rake::Task, :t)
      end
    end
    assert_equal t1, @tm[:t, []]
    assert_equal t2, @tm[:t, ["a"]]    
    assert_equal t3, @tm[:t, ["a", "b"]]
    assert_equal s,  @tm[:s, ["a", "b"]]
    assert_equal s,  @tm[:s, ["a"]]
  end

  def test_correctly_scoped_prerequisites_are_invoked
    values = []
    @tm = Rake::Application.new
    @tm.define_task(Rake::Task, :z) do values << "top z" end
    @tm.in_namespace("a") do
      @tm.define_task(Rake::Task, :z) do values << "next z" end
      @tm.define_task(Rake::Task, :x => :z)
    end

    @tm["a:x"].invoke
    assert_equal ["next z"], values
  end
  
end
