aboutsummaryrefslogtreecommitdiffstats
path: root/actionpack/test/dispatch/middleware_stack_test.rb
blob: 170c5b856501e1869f06b25c7bd32a0431287083 (plain) (blame)
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
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
require 'abstract_unit'

class MiddlewareStackTest < ActiveSupport::TestCase
  class FooMiddleware; end
  class BarMiddleware; end
  class BazMiddleware; end

  def setup
    @stack = ActionDispatch::MiddlewareStack.new
    @stack.use FooMiddleware
    @stack.use BarMiddleware
  end

  test "use should push middleware as class onto the stack" do
    assert_difference "@stack.size" do
      @stack.use BazMiddleware
    end
    assert_equal BazMiddleware, @stack.last.klass
  end

  test "use should push middleware as a string onto the stack" do
    assert_difference "@stack.size" do
      @stack.use "MiddlewareStackTest::BazMiddleware"
    end
    assert_equal BazMiddleware, @stack.last.klass
  end

  test "use should push middleware as a symbol onto the stack" do
    assert_difference "@stack.size" do
      @stack.use :"MiddlewareStackTest::BazMiddleware"
    end
    assert_equal BazMiddleware, @stack.last.klass
  end

  test "use should push middleware class with arguments onto the stack" do
    assert_difference "@stack.size" do
      @stack.use BazMiddleware, true, :foo => "bar"
    end
    assert_equal BazMiddleware, @stack.last.klass
    assert_equal([true, {:foo => "bar"}], @stack.last.args)
  end

  test "insert inserts middleware at the integer index" do
    @stack.insert(1, BazMiddleware)
    assert_equal BazMiddleware, @stack[1].klass
  end

  test "insert_after inserts middleware after the integer index" do
    @stack.insert_after(1, BazMiddleware)
    assert_equal BazMiddleware, @stack[2].klass
  end

  test "insert_before inserts middleware before another middleware class" do
    @stack.insert_before(BarMiddleware, BazMiddleware)
    assert_equal BazMiddleware, @stack[1].klass
  end

  test "insert_after inserts middleware after another middleware class" do
    @stack.insert_after(BarMiddleware, BazMiddleware)
    assert_equal BazMiddleware, @stack[2].klass
  end

  test "swaps one middleware out for another" do
    assert_equal FooMiddleware, @stack[0].klass
    @stack.swap(FooMiddleware, BazMiddleware)
    assert_equal BazMiddleware, @stack[0].klass
  end

  test "lazy evaluates middleware class" do
    assert_difference "@stack.size" do
      @stack.use "MiddlewareStackTest::BazMiddleware"
    end
    assert_equal BazMiddleware, @stack.last.klass
  end

  test "lazy compares so unloaded constants are not loaded" do
    @stack.use "UnknownMiddleware"
    @stack.use :"MiddlewareStackTest::BazMiddleware"
    assert @stack.include?("::MiddlewareStackTest::BazMiddleware")
  end
end