aboutsummaryrefslogtreecommitdiffstats
path: root/actionview/test/template/digestor_test.rb
blob: 779a7fb53c8a981bdf7bdb44c59ba94af1e8d9c8 (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
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
require 'abstract_unit'
require 'fileutils'

class FixtureTemplate
  attr_reader :source, :handler

  def initialize(template_path)
    @source = File.read(template_path)
    @handler = ActionView::Template.handler_for_extension(:erb)
  rescue Errno::ENOENT
    raise ActionView::MissingTemplate.new([], "", [], true, [])
  end
end

class FixtureFinder
  FIXTURES_DIR = "#{File.dirname(__FILE__)}/../fixtures/digestor"

  attr_reader :details

  def initialize
    @details = {}
  end

  def details_key
    details.hash
  end

  def find(logical_name, keys, partial, options)
    FixtureTemplate.new("digestor/#{partial ? logical_name.gsub(%r|/([^/]+)$|, '/_\1') : logical_name}.#{options[:formats].first}.erb")
  end
end

class TemplateDigestorTest < ActionView::TestCase
  def setup
    @cwd     = Dir.pwd
    @tmp_dir = Dir.mktmpdir

    FileUtils.cp_r FixtureFinder::FIXTURES_DIR, @tmp_dir
    Dir.chdir @tmp_dir
  end

  def teardown
    Dir.chdir @cwd
    FileUtils.rm_r @tmp_dir
    ActionView::Digestor.cache.clear
  end

  def test_top_level_change_reflected
    assert_digest_difference("messages/show") do
      change_template("messages/show")
    end
  end

  def test_explicit_dependency
    assert_digest_difference("messages/show") do
      change_template("messages/_message")
    end
  end

  def test_explicit_dependency_in_multiline_erb_tag
    assert_digest_difference("messages/show") do
      change_template("messages/_form")
    end
  end

  def test_second_level_dependency
    assert_digest_difference("messages/show") do
      change_template("comments/_comments")
    end
  end

  def test_second_level_dependency_within_same_directory
    assert_digest_difference("messages/show") do
      change_template("messages/_header")
    end
  end

  def test_third_level_dependency
    assert_digest_difference("messages/show") do
      change_template("comments/_comment")
    end
  end

  def test_directory_depth_dependency
    assert_digest_difference("level/below/index") do
      change_template("level/below/_header")
    end
  end

  def test_logging_of_missing_template
    assert_logged "Couldn't find template for digesting: messages/something_missing.html" do
      digest("messages/show")
    end
  end

  def test_logging_of_missing_template_ending_with_number
    assert_logged "Couldn't find template for digesting: messages/something_missing_1.html" do
      digest("messages/show")
    end
  end

  def test_nested_template_directory
    assert_digest_difference("messages/show") do
      change_template("messages/actions/_move")
    end
  end

  def test_recursion_in_renders
    assert digest("level/recursion") # assert recursion is possible
    assert_not_nil digest("level/recursion") # assert digest is stored
  end

  def test_chaining_the_top_template_on_recursion
    assert digest("level/recursion") # assert recursion is possible

    assert_digest_difference("level/recursion") do
      change_template("level/recursion")
    end

    assert_not_nil digest("level/recursion") # assert digest is stored
  end

  def test_chaining_the_partial_template_on_recursion
    assert digest("level/recursion") # assert recursion is possible

    assert_digest_difference("level/recursion") do
      change_template("level/_recursion")
    end

    assert_not_nil digest("level/recursion") # assert digest is stored
  end

  def test_dont_generate_a_digest_for_missing_templates
    assert_equal '', digest("nothing/there")
  end

  def test_collection_dependency
    assert_digest_difference("messages/index") do
      change_template("messages/_message")
    end

    assert_digest_difference("messages/index") do
      change_template("events/_event")
    end
  end

  def test_collection_derived_from_record_dependency
    assert_digest_difference("messages/show") do
      change_template("events/_event")
    end
  end

  def test_details_are_included_in_cache_key
    # Cache the template digest.
    old_digest = digest("events/_event")

    # Change the template; the cached digest remains unchanged.
    change_template("events/_event")

    # The details are changed, so a new cache key is generated.
    finder.details[:foo] = "bar"

    # The cache is busted.
    assert_not_equal old_digest, digest("events/_event")
  end

  def test_extra_whitespace_in_render_partial
    assert_digest_difference("messages/edit") do
      change_template("messages/_form")
    end
  end

  def test_extra_whitespace_in_render_named_partial
    assert_digest_difference("messages/edit") do
      change_template("messages/_header")
    end
  end

  def test_extra_whitespace_in_render_record
    assert_digest_difference("messages/edit") do
      change_template("messages/_message")
    end
  end

  def test_extra_whitespace_in_render_with_parenthesis
    assert_digest_difference("messages/edit") do
      change_template("events/_event")
    end
  end

  def test_old_style_hash_in_render_invocation
    assert_digest_difference("messages/edit") do
      change_template("comments/_comment")
    end
  end

  def test_dependencies_via_options_results_in_different_digest
    digest_plain        = digest("comments/_comment")
    digest_fridge       = digest("comments/_comment", dependencies: ["fridge"])
    digest_phone        = digest("comments/_comment", dependencies: ["phone"])
    digest_fridge_phone = digest("comments/_comment", dependencies: ["fridge", "phone"])

    assert_not_equal digest_plain, digest_fridge
    assert_not_equal digest_plain, digest_phone
    assert_not_equal digest_plain, digest_fridge_phone
    assert_not_equal digest_fridge, digest_phone
    assert_not_equal digest_fridge, digest_fridge_phone
    assert_not_equal digest_phone, digest_fridge_phone
  end

  def test_cache_template_loading
    resolver_before = ActionView::Resolver.caching
    ActionView::Resolver.caching = false
    assert_digest_difference("messages/edit", true) do
      change_template("comments/_comment")
    end
    ActionView::Resolver.caching = resolver_before
  end

  def test_digest_cache_cleanup_with_recursion
    first_digest = digest("level/_recursion")
    second_digest = digest("level/_recursion")

    assert first_digest

    # If the cache is cleaned up correctly, subsequent digests should return the same
    assert_equal first_digest, second_digest
  end

  def test_digest_cache_cleanup_with_recursion_and_template_caching_off
    resolver_before = ActionView::Resolver.caching
    ActionView::Resolver.caching = false

    first_digest = digest("level/_recursion")
    second_digest = digest("level/_recursion")

    assert first_digest

    # If the cache is cleaned up correctly, subsequent digests should return the same
    assert_equal first_digest, second_digest
  ensure
    ActionView::Resolver.caching = resolver_before
  end

  private
    def assert_logged(message)
      old_logger = ActionView::Base.logger
      log = StringIO.new
      ActionView::Base.logger = Logger.new(log)

      begin
        yield

        log.rewind
        assert_match message, log.read
      ensure
        ActionView::Base.logger = old_logger
      end
    end

    def assert_digest_difference(template_name, persistent = false)
      previous_digest = digest(template_name)
      ActionView::Digestor.cache.clear unless persistent

      yield

      assert previous_digest != digest(template_name), "digest didn't change"
      ActionView::Digestor.cache.clear
    end

    def digest(template_name, options={})
      ActionView::Digestor.digest(template_name, :html, finder, options)
    end

    def finder
      @finder ||= FixtureFinder.new
    end

    def change_template(template_name)
      File.open("digestor/#{template_name}.html.erb", "w") do |f|
        f.write "\nTHIS WAS CHANGED!"
      end
    end
end