aboutsummaryrefslogtreecommitdiffstats
path: root/railties/test/plugin_test.rb
blob: 5500711df83c04bcf47cf24e6ecbdad4d5501a24 (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
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
require 'plugin_test_helper'

class PluginTest < Test::Unit::TestCase
  def setup
    @initializer         = Rails::Initializer.new(Rails::Configuration.new)
    @valid_plugin_path   = plugin_fixture_path('default/stubby')
    @empty_plugin_path   = plugin_fixture_path('default/empty')
    @gemlike_plugin_path = plugin_fixture_path('default/gemlike')
  end

  def test_should_determine_plugin_name_from_the_directory_of_the_plugin
    assert_equal 'stubby', plugin_for(@valid_plugin_path).name
    assert_equal 'empty', plugin_for(@empty_plugin_path).name
  end

  def test_should_not_be_loaded_when_created
    assert !plugin_for(@valid_plugin_path).loaded?
  end

  def test_should_be_marked_as_loaded_when_load_is_called
    plugin = plugin_for(@valid_plugin_path)
    assert !plugin.loaded?
    plugin.stubs(:evaluate_init_rb)
    assert_nothing_raised do
      plugin.send(:load, anything)
    end
    assert plugin.loaded?
  end

  def test_should_determine_validity_of_given_path
    # This is a plugin path, with a lib dir
    assert plugin_for(@valid_plugin_path).valid?
    # This just has an init.rb and no lib dir
    assert plugin_for(plugin_fixture_path('default/plugin_with_no_lib_dir')).valid?
    # This would be a plugin path, but the directory is empty
    assert !plugin_for(plugin_fixture_path('default/empty')).valid?
    # This is a non sense path
    assert !plugin_for(plugin_fixture_path('default/this_directory_does_not_exist')).valid?
  end

  def test_should_return_empty_array_for_load_paths_when_plugin_has_no_lib_directory
    assert_equal [], plugin_for(plugin_fixture_path('default/plugin_with_no_lib_dir')).load_paths
  end

  def test_should_return_array_with_lib_path_for_load_paths_when_plugin_has_a_lib_directory
    expected_lib_dir = File.join(plugin_fixture_path('default/stubby'), 'lib')
    assert_equal [expected_lib_dir], plugin_for(plugin_fixture_path('default/stubby')).load_paths
  end

  def test_should_raise_a_load_error_when_trying_to_determine_the_load_paths_from_an_invalid_plugin
    assert_nothing_raised do
      plugin_for(@valid_plugin_path).load_paths
    end
  
    assert_raises(LoadError) do
      plugin_for(@empty_plugin_path).load_paths
    end
  
    assert_raises(LoadError) do
      plugin_for('this_is_not_a_plugin_directory').load_paths
    end
  end

  def test_should_raise_a_load_error_when_trying_to_load_an_invalid_plugin
    # This path is fine so nothing is raised
    assert_nothing_raised do
      plugin = plugin_for(@valid_plugin_path)
      plugin.stubs(:evaluate_init_rb)
      plugin.send(:load, @initializer)
    end

    # This path is fine so nothing is raised
    assert_nothing_raised do
      plugin = plugin_for(@gemlike_plugin_path)
      plugin.stubs(:evaluate_init_rb)
      plugin.send(:load, @initializer)
    end

    # This is an empty path so it raises
    assert_raises(LoadError) do
      plugin = plugin_for(@empty_plugin_path)
      plugin.stubs(:evaluate_init_rb)      
      plugin.send(:load, @initializer)
    end
  
    assert_raises(LoadError) do
      plugin = plugin_for('this_is_not_a_plugin_directory')
      plugin.stubs(:evaluate_init_rb)
      plugin.send(:load, @initializer)
    end
  end
  
  def test_should_raise_a_load_error_when_trying_to_access_load_paths_of_an_invalid_plugin
    # This path is fine so nothing is raised
    assert_nothing_raised do
      plugin_for(@valid_plugin_path).load_paths
    end
  
    # This is an empty path so it raises
    assert_raises(LoadError) do
      plugin_for(@empty_plugin_path).load_paths
    end
  
    assert_raises(LoadError) do
      plugin_for('this_is_not_a_plugin_directory').load_paths
    end
  end    

  def test_loading_a_plugin_gives_the_init_file_access_to_all_it_needs
    failure_tip = "Perhaps someone has written another test that loads this same plugin and therefore makes the StubbyMixin constant defined already."
    assert !defined?(StubbyMixin), failure_tip
    plugin = plugin_for(@valid_plugin_path)
    plugin.load_paths.each { |path| $LOAD_PATH.unshift(path) }
    # The init.rb of this plugin raises if it doesn't have access to all the things it needs
    assert_nothing_raised do
      plugin.load(@initializer)
    end
    assert defined?(StubbyMixin)
  end
  
  def test_should_sort_naturally_by_name
    a = plugin_for("path/a")
    b = plugin_for("path/b")
    z = plugin_for("path/z")
    assert_equal [a, b, z], [b, z, a].sort
  end
  
  def test_should_only_be_loaded_once
    plugin = plugin_for(@valid_plugin_path)
    assert !plugin.loaded?
    plugin.expects(:evaluate_init_rb)
    assert_nothing_raised do
      plugin.send(:load, @initializer)
      plugin.send(:load, @initializer)
    end
    assert plugin.loaded?
  end
  
  def test_should_make_about_yml_available_as_about_method_on_plugin
    plugin = plugin_for(@valid_plugin_path)
    assert_equal "Plugin Author", plugin.about['author']
    assert_equal "1.0.0", plugin.about['version']
  end
  
  def test_should_return_empty_hash_for_about_if_about_yml_is_missing
    assert_equal({}, plugin_for(about_yml_plugin_path('plugin_without_about_yaml')).about)
  end
  
  def test_should_return_empty_hash_for_about_if_about_yml_is_malformed
    assert_equal({}, plugin_for(about_yml_plugin_path('bad_about_yml')).about)
  end

  private

    def about_yml_plugin_path(name)
      File.join(File.dirname(__FILE__), 'fixtures', 'about_yml_plugins', name)
    end

    def plugin_for(path)
      Rails::Plugin.new(path)
    end
end