test/lib/rich_text_test.rb

   1 # frozen_string_literal: true
   2
   3 require "test_helper"
   4
   5 class RichTextTest < ActiveSupport::TestCase
   6   include Rails::Dom::Testing::Assertions::SelectorAssertions
   7
   8   def setup
   9     RichText.reset_state
  10   end
  11
  12   def test_html_to_html
  13     r = RichText.new("html", "foo http://example.com/ bar")
  14     assert_html r do
  15       assert_select "a", 1
  16       assert_select "a[href='http://example.com/']", 1
  17       assert_select "a[rel='nofollow noopener noreferrer']", 1
  18     end
  19
  20     r = RichText.new("html", "foo <a href='http://example.com/'>bar</a> baz")
  21     assert_html r do
  22       assert_select "a", 1
  23       assert_select "a[href='http://example.com/']", 1
  24       assert_select "a[rel='nofollow noopener noreferrer']", 1
  25     end
  26
  27     r = RichText.new("html", "foo <a rel='junk me trash' href='http://example.com/'>bar</a> baz")
  28     assert_html r do
  29       assert_select "a", 1
  30       assert_select "a[href='http://example.com/']", 1
  31       assert_select "a[rel='me nofollow noopener noreferrer']", 1
  32     end
  33
  34     r = RichText.new("html", "foo example@example.com bar")
  35     assert_html r do
  36       assert_select "a", 0
  37     end
  38
  39     r = RichText.new("html", "foo <a href='mailto:example@example.com'>bar</a> baz")
  40     assert_html r do
  41       assert_select "a", 1
  42       assert_select "a[href='mailto:example@example.com']", 1
  43       assert_select "a[rel='nofollow noopener noreferrer']", 1
  44     end
  45
  46     r = RichText.new("html", "foo <div>bar</div> baz")
  47     assert_html r do
  48       assert_select "div", false
  49       assert_select "p", /^foo *bar *baz$/
  50     end
  51
  52     r = RichText.new("html", "foo <script>bar = 1;</script> baz")
  53     assert_html r do
  54       assert_select "script", false
  55       assert_select "p", /^foo *baz$/
  56     end
  57
  58     r = RichText.new("html", "foo <style>div { display: none; }</style> baz")
  59     assert_html r do
  60       assert_select "style", false
  61       assert_select "p", /^foo *baz$/
  62     end
  63
  64     r = RichText.new("html", "<table><tr><td>column</td></tr></table>")
  65     assert_html r do
  66       assert_select "table[class='table table-sm w-auto']"
  67     end
  68
  69     r = RichText.new("html", "<p class='btn btn-warning'>Click Me</p>")
  70     assert_html r do
  71       assert_select "p[class='btn btn-warning']", false
  72       assert_select "p", /^Click Me$/
  73     end
  74
  75     r = RichText.new("html", "<p style='color:red'>Danger</p>")
  76     assert_html r do
  77       assert_select "p[style='color:red']", false
  78       assert_select "p", /^Danger$/
  79     end
  80   end
  81
  82   def test_html_to_text
  83     r = RichText.new("html", "foo <a href='http://example.com/'>bar</a> baz")
  84     assert_equal "foo <a href='http://example.com/'>bar</a> baz", r.to_text
  85   end
  86
  87   def test_markdown_to_html
  88     r = RichText.new("markdown", "foo http://example.com/ bar")
  89     assert_html r do
  90       assert_select "a", 1
  91       assert_select "a[href='http://example.com/']", 1
  92       assert_select "a[rel='nofollow noopener noreferrer']", 1
  93     end
  94
  95     r = RichText.new("markdown", "foo [bar](http://example.com/) baz")
  96     assert_html r do
  97       assert_select "a", 1
  98       assert_select "a[href='http://example.com/']", 1
  99       assert_select "a[rel='nofollow noopener noreferrer']", 1
 100     end
 101
 102     r = RichText.new("markdown", "foo <a rel='junk me trash' href='http://example.com/'>bar</a>) baz")
 103     assert_html r do
 104       assert_select "a", 1
 105       assert_select "a[href='http://example.com/']", 1
 106       assert_select "a[rel='me nofollow noopener noreferrer']", 1
 107     end
 108
 109     r = RichText.new("markdown", "foo example@example.com bar")
 110     assert_html r do
 111       assert_select "a", 1
 112       assert_select "a[href='mailto:example@example.com']", 1
 113       assert_select "a[rel='nofollow noopener noreferrer']", 1
 114     end
 115
 116     r = RichText.new("markdown", "foo [bar](mailto:example@example.com) bar")
 117     assert_html r do
 118       assert_select "a", 1
 119       assert_select "a[href='mailto:example@example.com']", 1
 120       assert_select "a[rel='nofollow noopener noreferrer']", 1
 121     end
 122
 123     r = RichText.new("markdown", "foo ![bar](http://example.com/example.png) bar")
 124     assert_html r do
 125       assert_select "img", 1
 126       assert_select "img[alt='bar']", 1
 127       assert_select "img[src='http://example.com/example.png']", 1
 128     end
 129
 130     r = RichText.new("markdown", "# foo bar baz")
 131     assert_html r do
 132       assert_select "h1", "foo bar baz"
 133     end
 134
 135     r = RichText.new("markdown", "## foo bar baz")
 136     assert_html r do
 137       assert_select "h2", "foo bar baz"
 138     end
 139
 140     r = RichText.new("markdown", "### foo bar baz")
 141     assert_html r do
 142       assert_select "h3", "foo bar baz"
 143     end
 144
 145     r = RichText.new("markdown", "* foo bar baz")
 146     assert_html r do
 147       assert_select "ul" do
 148         assert_select "li", "foo bar baz"
 149       end
 150     end
 151
 152     r = RichText.new("markdown", "1. foo bar baz")
 153     assert_html r do
 154       assert_select "ol" do
 155         assert_select "li", "foo bar baz"
 156       end
 157     end
 158
 159     r = RichText.new("markdown", "foo *bar* _baz_ qux")
 160     assert_html r do
 161       assert_select "em", "bar"
 162       assert_select "em", "baz"
 163     end
 164
 165     r = RichText.new("markdown", "foo **bar** __baz__ qux")
 166     assert_html r do
 167       assert_select "strong", "bar"
 168       assert_select "strong", "baz"
 169     end
 170
 171     r = RichText.new("markdown", "foo `bar` baz")
 172     assert_html r do
 173       assert_select "code", "bar"
 174     end
 175
 176     r = RichText.new("markdown", "    foo bar baz")
 177     assert_html r do
 178       assert_select "pre", /^\s*foo bar baz\s*$/
 179     end
 180
 181     r = RichText.new("markdown", "|column|column")
 182     assert_html r do
 183       assert_select "table[class='table table-sm w-auto']"
 184     end
 185
 186     r = RichText.new("markdown", "Click Me\n{:.btn.btn-warning}")
 187     assert_html r do
 188       assert_select "p[class='btn btn-warning']", false
 189       assert_select "p", /^Click Me$/
 190     end
 191
 192     r = RichText.new("markdown", "<p style='color:red'>Danger</p>")
 193     assert_html r do
 194       assert_select "p[style='color:red']", false
 195       assert_select "p", /^Danger$/
 196     end
 197   end
 198
 199   def test_markdown_table_alignment
 200     # Ensure that kramdown table alignment styles are converted to bootstrap classes
 201     markdown_table = <<~MARKDOWN
 202       | foo  | bar |
 203       |:----:|----:|
 204       |center|right|
 205     MARKDOWN
 206     r = RichText.new("markdown", markdown_table)
 207     assert_html r do
 208       assert_select "td[style='text-align:center']", false
 209       assert_select "td[class='text-center']", true
 210       assert_select "td[style='text-align:right']", false
 211       assert_select "td[class='text-end']", true
 212     end
 213   end
 214
 215   def test_markdown_to_text
 216     r = RichText.new("markdown", "foo [bar](http://example.com/) baz")
 217     assert_equal "foo [bar](http://example.com/) baz", r.to_text
 218   end
 219
 220   def test_text_to_html_linkify
 221     with_settings(:linkify => { :normalisation_rules => [{ :hosts => ["replace-me.example.com"], :host_replacement => "repl.example.com" }] }) do
 222       r = RichText.new("text", "foo http://example.com/ bar")
 223       assert_html r do
 224         assert_dom "a", :count => 1, :text => "http://example.com/" do
 225           assert_dom "> @href", "http://example.com/"
 226           assert_dom "> @rel", "nofollow noopener noreferrer"
 227         end
 228       end
 229     end
 230   end
 231
 232   def test_text_to_html_linkify_replace
 233     with_settings(:linkify => { :normalisation_rules => [{ :hosts => ["replace-me.example.com"], :host_replacement => "repl.example.com" }] }) do
 234       r = RichText.new("text", "foo https://replace-me.example.com/some/path?query=te<st&limit=20>10#result12 bar")
 235       assert_html r do
 236         assert_dom "a", :count => 1, :text => "repl.example.com/some/path?query=te<st&limit=20>10#result12" do
 237           assert_dom "> @href", "https://replace-me.example.com/some/path?query=te<st&limit=20>10#result12"
 238           assert_dom "> @rel", "nofollow noopener noreferrer"
 239         end
 240       end
 241     end
 242   end
 243
 244   def test_text_to_html_linkify_recognize
 245     with_settings(:linkify => { :normalisation_rules => [{ :hosts => ["replace-me.example.com"], :host_replacement => "repl.example.com" }] }) do
 246       r = RichText.new("text", "foo repl.example.com/some/path?query=te<st&limit=20>10#result12 bar")
 247       assert_html r do
 248         assert_dom "a", :count => 1, :text => "repl.example.com/some/path?query=te<st&limit=20>10#result12" do
 249           assert_dom "> @href", "http://replace-me.example.com/some/path?query=te<st&limit=20>10#result12"
 250           assert_dom "> @rel", "nofollow noopener noreferrer"
 251         end
 252       end
 253     end
 254   end
 255
 256   def test_text_to_html_linkify_replace_other_scheme
 257     with_settings(:linkify => { :normalisation_rules => [{ :hosts => ["replace-me.example.com"], :host_replacement => "repl.example.com" }] }) do
 258       r = RichText.new("text", "foo ftp://replace-me.example.com/some/path?query=te<st&limit=20>10#result12 bar")
 259       assert_html r do
 260         assert_dom "a", :count => 1, :text => "ftp://replace-me.example.com/some/path?query=te<st&limit=20>10#result12" do
 261           assert_dom "> @href", "ftp://replace-me.example.com/some/path?query=te<st&limit=20>10#result12"
 262           assert_dom "> @rel", "nofollow noopener noreferrer"
 263         end
 264       end
 265     end
 266   end
 267
 268   def test_text_to_html_linkify_replace_undefined
 269     with_settings(:linkify => { :normalisation_rules => [{ :hosts => ["replace-me.example.com"] }] }) do
 270       r = RichText.new("text", "foo https://replace-me.example.com/some/path?query=te<st&limit=20>10#result12 bar")
 271       assert_html r do
 272         assert_dom "a", :count => 1, :text => "https://replace-me.example.com/some/path?query=te<st&limit=20>10#result12" do
 273           assert_dom "> @href", "https://replace-me.example.com/some/path?query=te<st&limit=20>10#result12"
 274           assert_dom "> @rel", "nofollow noopener noreferrer"
 275         end
 276       end
 277     end
 278   end
 279
 280   def test_text_to_html_linkify_wiki_replace_prefix
 281     with_settings(:linkify => { :normalisation_rules => [{ :hosts => ["replace-me-wiki.example.com"], :host_replacement => "wiki.example.com", :optional_path_prefix => "^/wiki(?=/[A-Z])" }] }) do
 282       r = RichText.new("text", "foo https://replace-me-wiki.example.com/wiki/Tag:surface%3Dmetal bar")
 283       assert_html r do
 284         assert_dom "a", :count => 1, :text => "wiki.example.com/Tag:surface%3Dmetal" do
 285           assert_dom "> @href", "https://replace-me-wiki.example.com/wiki/Tag:surface%3Dmetal"
 286           assert_dom "> @rel", "nofollow noopener noreferrer"
 287         end
 288       end
 289     end
 290   end
 291
 292   def test_text_to_html_linkify_wiki_replace_prefix_undefined
 293     with_settings(:linkify => { :normalisation_rules => [{ :hosts => ["replace-me-wiki.example.com"], :host_replacement => "wiki.example.com" }] }) do
 294       r = RichText.new("text", "foo https://replace-me-wiki.example.com/wiki/Tag:surface%3Dmetal bar")
 295       assert_html r do
 296         assert_dom "a", :count => 1, :text => "wiki.example.com/wiki/Tag:surface%3Dmetal" do
 297           assert_dom "> @href", "https://replace-me-wiki.example.com/wiki/Tag:surface%3Dmetal"
 298           assert_dom "> @rel", "nofollow noopener noreferrer"
 299         end
 300       end
 301     end
 302   end
 303
 304   def test_text_to_html_linkify_wiki_replace_undefined_prefix
 305     with_settings(:linkify => { :normalisation_rules => [{ :hosts => ["replace-me-wiki.example.com"], :optional_path_prefix => "^/wiki(?=/[A-Z])" }] }) do
 306       r = RichText.new("text", "foo https://replace-me-wiki.example.com/wiki/Tag:surface%3Dmetal bar")
 307       assert_html r do
 308         assert_dom "a", :count => 1, :text => "https://replace-me-wiki.example.com/Tag:surface%3Dmetal" do
 309           assert_dom "> @href", "https://replace-me-wiki.example.com/wiki/Tag:surface%3Dmetal"
 310           assert_dom "> @rel", "nofollow noopener noreferrer"
 311         end
 312       end
 313     end
 314   end
 315
 316   def test_text_to_html_linkify_wiki_replace_prefix_no_match
 317     with_settings(:linkify => { :normalisation_rules => [{ :hosts => ["replace-me-wiki.example.com"], :host_replacement => "wiki.example.com", :optional_path_prefix => "^/wiki(?=/[A-Z])" }] }) do
 318       r = RichText.new("text", "foo https://replace-me-wiki.example.com/wiki/w bar")
 319       assert_html r do
 320         assert_dom "a", :count => 1, :text => "wiki.example.com/wiki/w" do
 321           assert_dom "> @href", "https://replace-me-wiki.example.com/wiki/w"
 322           assert_dom "> @rel", "nofollow noopener noreferrer"
 323         end
 324       end
 325     end
 326   end
 327
 328   def test_text_to_html_linkify_recognize_wiki
 329     with_settings(:linkify => { :normalisation_rules => [{ :hosts => ["replace-me-wiki.example.com"], :host_replacement => "wiki.example.com", :optional_path_prefix => "^/wiki(?=/[A-Z])" }] }) do
 330       r = RichText.new("text", "foo wiki.example.com/Tag:surface%3Dmetal bar")
 331       assert_html r do
 332         assert_dom "a", :count => 1, :text => "wiki.example.com/Tag:surface%3Dmetal" do
 333           assert_dom "> @href", "http://replace-me-wiki.example.com/Tag:surface%3Dmetal"
 334           assert_dom "> @rel", "nofollow noopener noreferrer"
 335         end
 336       end
 337     end
 338   end
 339
 340   def test_text_to_html_linkify_idempotent
 341     with_settings(:linkify => { :normalisation_rules => [{ :hosts => ["test.host"], :host_replacement => "test.host" }] }) do
 342       t0 = "foo https://test.host/way/123456789 bar"
 343
 344       r1 = RichText.new("text", t0)
 345       t1 = Nokogiri::HTML.fragment(r1.to_html).text
 346
 347       r2 = RichText.new("text", t1)
 348       t2 = Nokogiri::HTML.fragment(r2.to_html).text
 349
 350       assert_equal t1, t2
 351     end
 352   end
 353
 354   def test_text_to_html_linkify_recognize_path
 355     with_settings(:linkify => { :detection_rules => [{ :patterns => ["@(?<username>\\w+)"], :path_template => "user/\\k<username>" }] }) do
 356       r = RichText.new("text", "foo @example bar")
 357       assert_html r do
 358         assert_dom "a", :count => 1, :text => "http://test.host/user/example" do
 359           assert_dom "> @href", "http://test.host/user/example"
 360           assert_dom "> @rel", "nofollow noopener noreferrer"
 361         end
 362       end
 363     end
 364   end
 365
 366   def test_text_to_html_linkify_recognize_path_no_partial_match
 367     with_settings(:linkify => { :detection_rules => [{ :patterns => ["@(?<username>\\w+)"], :path_template => "user/\\k<username>" }] }) do
 368       r = RichText.new("text", "foo example@example.com bar")
 369       assert_html r do
 370         assert_select "a", 0
 371       end
 372     end
 373   end
 374
 375   def test_text_to_html_linkify_recognize_wiki_key_value_path
 376     with_settings(:linkify => { :detection_rules => [{ :patterns => ["(?<key>[^\"?#<>/\\s]+)=(?<value>[^\"?#<>\\s]+)"], :path_template => "Tag:\\k<key>=\\k<value>", :host => "http://example.wiki" }] }) do
 377       r = RichText.new("text", "foo surface=metal bar")
 378       assert_html r do
 379         assert_dom "a", :count => 1, :text => "http://example.wiki/Tag:surface=metal" do
 380           assert_dom "> @href", "http://example.wiki/Tag:surface=metal"
 381           assert_dom "> @rel", "nofollow noopener noreferrer"
 382         end
 383       end
 384     end
 385   end
 386
 387   def test_text_to_html_linkify_recognize_wiki_key_path
 388     with_settings(:linkify => { :detection_rules => [{ :patterns => ["(?<key>[^\"?#<>/\\s]+)=\\*?"], :path_template => "Key:\\k<key>", :host => "http://example.wiki" }] }) do
 389       r = RichText.new("text", "foo surface=* bar")
 390       assert_html r do
 391         assert_dom "a", :count => 1, :text => "http://example.wiki/Key:surface" do
 392           assert_dom "> @href", "http://example.wiki/Key:surface"
 393           assert_dom "> @rel", "nofollow noopener noreferrer"
 394         end
 395       end
 396     end
 397   end
 398
 399   def test_text_to_html_linkify_openstreetmap_links
 400     with_settings(:server_url => "www.openstreetmap.org", :server_protocol => "https") do
 401       cases = {
 402         "https://www.openstreetmap.org/note/4655490" =>
 403           ["note/4655490", "https://www.openstreetmap.org/note/4655490"],
 404
 405         "https://www.openstreetmap.org/changeset/163353772" =>
 406           ["changeset/163353772", "https://www.openstreetmap.org/changeset/163353772"],
 407
 408         "https://www.openstreetmap.org/way/1249366504" =>
 409           ["way/1249366504", "https://www.openstreetmap.org/way/1249366504"],
 410
 411         "https://www.openstreetmap.org/way/1249366504/history" =>
 412           ["way/1249366504/history", "https://www.openstreetmap.org/way/1249366504/history"],
 413
 414         "https://www.openstreetmap.org/way/1249366504/history/2" =>
 415           ["way/1249366504/history/2", "https://www.openstreetmap.org/way/1249366504/history/2"],
 416
 417         "https://www.openstreetmap.org/node/12639964186" =>
 418           ["node/12639964186", "https://www.openstreetmap.org/node/12639964186"],
 419
 420         "https://www.openstreetmap.org/relation/7876483" =>
 421           ["relation/7876483", "https://www.openstreetmap.org/relation/7876483"],
 422
 423         "https://www.openstreetmap.org/user/aharvey" =>
 424           ["@aharvey", "https://www.openstreetmap.org/user/aharvey"],
 425
 426         "https://wiki.openstreetmap.org/wiki/Key:boundary" =>
 427           ["boundary=*", "https://wiki.openstreetmap.org/wiki/Key:boundary"],
 428
 429         "https://wiki.openstreetmap.org/wiki/Tag:boundary=place" =>
 430           ["boundary=place", "https://wiki.openstreetmap.org/wiki/Tag:boundary=place"],
 431
 432         "boundary=*" =>
 433           ["boundary=*", "https://wiki.openstreetmap.org/wiki/Key:boundary"],
 434
 435         "boundary=place" =>
 436           ["boundary=place", "https://wiki.openstreetmap.org/wiki/Tag:boundary=place"],
 437
 438         "@aharvey" =>
 439           ["@aharvey", "https://www.openstreetmap.org/user/aharvey"],
 440
 441         "node/12639964186" =>
 442           ["node/12639964186", "https://www.openstreetmap.org/node/12639964186"],
 443
 444         "node 12639964186" =>
 445           ["node/12639964186", "https://www.openstreetmap.org/node/12639964186"],
 446
 447         "n12639964186" =>
 448           ["node/12639964186", "https://www.openstreetmap.org/node/12639964186"],
 449
 450         "way/1249366504" =>
 451           ["way/1249366504", "https://www.openstreetmap.org/way/1249366504"],
 452
 453         "way 1249366504" =>
 454           ["way/1249366504", "https://www.openstreetmap.org/way/1249366504"],
 455
 456         "w1249366504" =>
 457           ["way/1249366504", "https://www.openstreetmap.org/way/1249366504"],
 458
 459         "relation/7876483" =>
 460           ["relation/7876483", "https://www.openstreetmap.org/relation/7876483"],
 461
 462         "relation 7876483" =>
 463           ["relation/7876483", "https://www.openstreetmap.org/relation/7876483"],
 464
 465         "r7876483" =>
 466           ["relation/7876483", "https://www.openstreetmap.org/relation/7876483"],
 467
 468         "changeset/163353772" =>
 469           ["changeset/163353772", "https://www.openstreetmap.org/changeset/163353772"],
 470
 471         "changeset 163353772" =>
 472           ["changeset/163353772", "https://www.openstreetmap.org/changeset/163353772"],
 473
 474         "note/4655490" =>
 475           ["note/4655490", "https://www.openstreetmap.org/note/4655490"],
 476
 477         "note 4655490" =>
 478           ["note/4655490", "https://www.openstreetmap.org/note/4655490"]
 479       }
 480
 481       cases.each do |input, (expected_text, expected_href)|
 482         r = RichText.new("text", input)
 483         assert_html r do
 484           assert_dom "a[href='#{expected_href}']", :count => 1, :text => expected_text
 485         end
 486       end
 487     end
 488   end
 489
 490   def test_text_to_html_linkify_no_year_misinterpretation
 491     r = RichText.new("text", "We thought there was no way 2020 could be worse than 2019. We were wrong. Please note 2025 is the first square year since OSM started. In that year, some osmlab repos switched from node 22 to bun 1.3.")
 492     assert_html r do
 493       assert_select "a", 0
 494     end
 495   end
 496
 497   def test_text_to_html_dont_linkify_too_easily
 498     # We used to allow this, but removed it because it
 499     # caused issues in some languages.
 500     # Eg: example below is Polish for "Reverted in 12345"
 501     r = RichText.new("text", "Wycofane w 12345")
 502
 503     assert_html r do
 504       assert_select "a", 0
 505     end
 506   end
 507
 508   def test_deactivated_linkify_expansion_in_markdown
 509     t0 = "foo `surface=metal` bar"
 510
 511     r1 = RichText.new("markdown", t0)
 512     t1 = Nokogiri::HTML.fragment(r1.to_html).text
 513
 514     assert_equal t0.delete("`"), t1.strip
 515   end
 516
 517   def test_text_to_html_linkify_trims_punctuation
 518     r = RichText.new("text", "foo `surface=metal) bar inscription=🙂 baz")
 519     assert_html r do
 520       assert_dom "a", :count => 1
 521       assert_dom "a[href$='Tag:surface=metal']", :text => "surface=metal"
 522     end
 523   end
 524
 525   def test_text_to_html_linkify_recognizes_non_standard_wiki_pages
 526     r_paren = RichText.new("text", "foo source=Isle_of_Man_Government_1:25000_map_(2007) bar")
 527     assert_html r_paren do
 528       assert_dom "a[href*='Tag:source']", :text => "source=Isle_of_Man_Government_1:25000_map_(2007)"
 529     end
 530     r_latin_ext = RichText.new("text", "foo cuisine=açaí bar")
 531     assert_html r_latin_ext do
 532       assert_dom "a[href*='Tag:cuisine']", :text => "cuisine=açaí"
 533     end
 534     r_cyrillic = RichText.new("text", "foo name=Продукты bar")
 535     assert_html r_cyrillic do
 536       assert_dom "a[href*='Tag:name']", :text => "name=Продукты"
 537     end
 538     r_cjk = RichText.new("text", "foo shop=園芸店 bar")
 539     assert_html r_cjk do
 540       assert_dom "a[href*='Tag:shop']", :text => "shop=園芸店"
 541     end
 542   end
 543
 544   def test_text_to_html_email
 545     r = RichText.new("text", "foo example@example.com bar")
 546     assert_html r do
 547       assert_select "a", 0
 548     end
 549   end
 550
 551   def test_text_to_html_escape
 552     r = RichText.new("text", "foo < bar & baz > qux")
 553     assert_html r do
 554       assert_select "p", "foo < bar & baz > qux"
 555     end
 556   end
 557
 558   def test_text_to_text
 559     r = RichText.new("text", "foo http://example.com/ bar")
 560     assert_equal "foo http://example.com/ bar", r.to_text
 561   end
 562
 563   def test_text_no_opengraph_properties
 564     r = RichText.new("text", "foo https://example.com/ bar")
 565     assert_nil r.image
 566     assert_nil r.image_alt
 567     assert_nil r.description
 568   end
 569
 570   def test_html_no_opengraph_properties
 571     r = RichText.new("html", "foo <a href='https://example.com/'>bar</a> baz")
 572     assert_nil r.image
 573     assert_nil r.image_alt
 574     assert_nil r.description
 575   end
 576
 577   def test_markdown_no_image
 578     r = RichText.new("markdown", "foo [bar](https://example.com/) baz")
 579     assert_nil r.image
 580     assert_nil r.image_alt
 581   end
 582
 583   def test_markdown_image
 584     r = RichText.new("markdown", "foo ![bar](https://example.com/image.jpg) baz")
 585     assert_equal "https://example.com/image.jpg", r.image
 586     assert_equal "bar", r.image_alt
 587   end
 588
 589   def test_markdown_first_image
 590     r = RichText.new("markdown", "foo ![bar1](https://example.com/image1.jpg) baz\nfoo ![bar2](https://example.com/image2.jpg) baz")
 591     assert_equal "https://example.com/image1.jpg", r.image
 592     assert_equal "bar1", r.image_alt
 593   end
 594
 595   def test_markdown_image_with_empty_src
 596     r = RichText.new("markdown", "![invalid]()")
 597     assert_nil r.image
 598     assert_nil r.image_alt
 599   end
 600
 601   def test_markdown_skip_image_with_empty_src
 602     r = RichText.new("markdown", "![invalid]() ![valid](https://example.com/valid.gif)")
 603     assert_equal "https://example.com/valid.gif", r.image
 604     assert_equal "valid", r.image_alt
 605   end
 606
 607   def test_markdown_html_image
 608     r = RichText.new("markdown", "<img src='https://example.com/img_element.png' alt='alt text here'>")
 609     assert_equal "https://example.com/img_element.png", r.image
 610     assert_equal "alt text here", r.image_alt
 611   end
 612
 613   def test_markdown_html_image_without_alt
 614     r = RichText.new("markdown", "<img src='https://example.com/img_element.png'>")
 615     assert_equal "https://example.com/img_element.png", r.image
 616     assert_nil r.image_alt
 617   end
 618
 619   def test_markdown_html_image_with_empty_src
 620     r = RichText.new("markdown", "<img src='' alt='forgot src'>")
 621     assert_nil r.image
 622     assert_nil r.image_alt
 623   end
 624
 625   def test_markdown_skip_html_image_with_empty_src
 626     r = RichText.new("markdown", "<img src='' alt='forgot src'> <img src='https://example.com/next_img_element.png' alt='have src'>")
 627     assert_equal "https://example.com/next_img_element.png", r.image
 628     assert_equal "have src", r.image_alt
 629   end
 630
 631   def test_markdown_html_image_without_src
 632     r = RichText.new("markdown", "<img alt='totally forgot src'>")
 633     assert_nil r.image
 634     assert_nil r.image_alt
 635   end
 636
 637   def test_markdown_skip_html_image_without_src
 638     r = RichText.new("markdown", "<img alt='totally forgot src'> <img src='https://example.com/next_img_element.png' alt='have src'>")
 639     assert_equal "https://example.com/next_img_element.png", r.image
 640     assert_equal "have src", r.image_alt
 641   end
 642
 643   def test_markdown_no_description
 644     r = RichText.new("markdown", "#Nope")
 645     assert_nil r.description
 646   end
 647
 648   def test_markdown_description
 649     r = RichText.new("markdown", "This is an article about something.")
 650     assert_equal "This is an article about something.", r.description
 651   end
 652
 653   def test_markdown_description_after_heading
 654     r = RichText.new("markdown", "#Heading\n\nHere starts the text.")
 655     assert_equal "Here starts the text.", r.description
 656   end
 657
 658   def test_markdown_description_after_image
 659     r = RichText.new("markdown", "![bar](https://example.com/image.jpg)\n\nThis is below the image.")
 660     assert_equal "This is below the image.", r.description
 661   end
 662
 663   def test_markdown_description_only_first_paragraph
 664     r = RichText.new("markdown", "This thing.\n\nMaybe also that thing.")
 665     assert_equal "This thing.", r.description
 666   end
 667
 668   def test_markdown_description_elements
 669     r = RichText.new("markdown", "*Something* **important** [here](https://example.com/).")
 670     assert_equal "Something important here.", r.description
 671   end
 672
 673   def test_markdown_html_description
 674     r = RichText.new("markdown", "<p>Can use HTML tags.</p>")
 675     assert_equal "Can use HTML tags.", r.description
 676   end
 677
 678   def test_markdown_description_max_length
 679     m = RichText::DESCRIPTION_MAX_LENGTH
 680     o = 3 # "...".length
 681
 682     r = RichText.new("markdown", "x" * m)
 683     assert_equal "x" * m, r.description
 684
 685     r = RichText.new("markdown", "y" * (m + 1))
 686     assert_equal "#{'y' * (m - o)}...", r.description
 687
 688     r = RichText.new("markdown", "*zzzzzzzzz*z" * ((m + 1) / 10.0).ceil)
 689     assert_equal "#{'z' * (m - o)}...", r.description
 690   end
 691
 692   def test_markdown_description_word_break_threshold_length
 693     m = RichText::DESCRIPTION_MAX_LENGTH
 694     t = RichText::DESCRIPTION_WORD_BREAK_THRESHOLD_LENGTH
 695     o = 3 # "...".length
 696
 697     r = RichText.new("markdown", "#{'x' * (t - o - 1)} #{'y' * (m - (t - o - 1) - 1)}")
 698     assert_equal "#{'x' * (t - o - 1)} #{'y' * (m - (t - o - 1) - 1)}", r.description
 699
 700     r = RichText.new("markdown", "#{'x' * (t - o - 1)} #{'y' * (m - (t - o - 1))}")
 701     assert_equal "#{'x' * (t - o - 1)} #{'y' * (m - (t - o - 1) - 4)}...", r.description
 702
 703     r = RichText.new("markdown", "#{'x' * (t - o)} #{'y' * (m - (t - o) - 1)}")
 704     assert_equal "#{'x' * (t - o)} #{'y' * (m - (t - o) - 1)}", r.description
 705
 706     r = RichText.new("markdown", "#{'x' * (t - o)} #{'y' * (m - (t - o))}")
 707     assert_equal "#{'x' * (t - o)}...", r.description
 708   end
 709
 710   def test_markdown_description_word_break_multiple_spaces
 711     m = RichText::DESCRIPTION_MAX_LENGTH
 712     t = RichText::DESCRIPTION_WORD_BREAK_THRESHOLD_LENGTH
 713     o = 3 # "...".length
 714
 715     r = RichText.new("markdown", "#{'x' * (t - o)}  #{'y' * (m - (t - o - 1))}")
 716     assert_equal "#{'x' * (t - o)}...", r.description
 717   end
 718
 719   private
 720
 721   def assert_html(richtext, &block)
 722     html = richtext.to_html
 723     assert_predicate html, :html_safe?
 724     root = Nokogiri::HTML::DocumentFragment.parse(html)
 725     assert_select root, "*" do
 726       yield block
 727     end
 728   end
 729 end