1 files changed, 55 insertions, 0 deletions
diff --git a/actionview/test/template/output_safety_helper_test.rb b/actionview/test/template/output_safety_helper_test.rb
index 8de0ae2f6f..b940c9dd36 100644
--- a/actionview/test/template/output_safety_helper_test.rb
+++ b/actionview/test/template/output_safety_helper_test.rb
@@ -32,4 +32,59 @@ class OutputSafetyHelperTest < ActionView::TestCase
     joined = safe_join(['"a"',['<b>','<c>']], ' <br/> ')
     assert_equal '&quot;a&quot; &lt;br/&gt; &lt;b&gt; &lt;br/&gt; &lt;c&gt;', joined
   end
+
+  test "to_sentence should escape non-html_safe values" do
+    actual = to_sentence(%w(< > & ' "))
+    assert actual.html_safe?
+    assert_equal("&lt;, &gt;, &amp;, &#39;, and &quot;", actual)
+
+    actual = to_sentence(%w(<script>))
+    assert actual.html_safe?
+    assert_equal("&lt;script&gt;", actual)
+  end
+
+  test "to_sentence does not double escape if single value is html_safe" do
+    assert_equal("&lt;script&gt;", to_sentence([ERB::Util.html_escape("<script>")]))
+    assert_equal("&lt;script&gt;", to_sentence(["&lt;script&gt;".html_safe]))
+    assert_equal("&amp;lt;script&amp;gt;", to_sentence(["&lt;script&gt;"]))
+  end
+
+  test "to_sentence connector words are checked for html safety" do
+    assert_equal "one & two, and three", to_sentence(['one', 'two', 'three'], words_connector: ' & '.html_safe)
+    assert_equal "one & two", to_sentence(['one', 'two'], two_words_connector: ' & '.html_safe)
+    assert_equal "one, two &lt;script&gt;alert(1)&lt;/script&gt; three", to_sentence(['one', 'two', 'three'], last_word_connector: ' <script>alert(1)</script> ')
+  end
+
+  test "to_sentence should not escape html_safe values" do
+    ptag = content_tag("p") do
+      safe_join(["<marquee>shady stuff</marquee>", tag("br")])
+    end
+    url = "https://example.com"
+    expected = %(<a href="#{url}">#{url}</a> and <p>&lt;marquee&gt;shady stuff&lt;/marquee&gt;<br /></p>)
+    actual = to_sentence([link_to(url, url), ptag])
+    assert actual.html_safe?
+    assert_equal(expected, actual)
+  end
+
+  test "to_sentence handles blank strings" do
+    actual = to_sentence(['', 'two', 'three'])
+    assert actual.html_safe?
+    assert_equal ", two, and three", actual
+  end
+
+  test "to_sentence handles nil values" do
+    actual = to_sentence([nil, 'two', 'three'])
+    assert actual.html_safe?
+    assert_equal ", two, and three", actual
+  end
+
+  test "to_sentence still supports ActiveSupports Array#to_sentence arguments" do
+    assert_equal "one two, and three", to_sentence(['one', 'two', 'three'], words_connector: ' ')
+    assert_equal "one & two, and three", to_sentence(['one', 'two', 'three'], words_connector: ' & '.html_safe)
+    assert_equal "onetwo, and three", to_sentence(['one', 'two', 'three'], words_connector: nil)
+    assert_equal "one, two, and also three", to_sentence(['one', 'two', 'three'], last_word_connector: ', and also ')
+    assert_equal "one, twothree", to_sentence(['one', 'two', 'three'], last_word_connector: nil)
+    assert_equal "one, two three", to_sentence(['one', 'two', 'three'], last_word_connector: ' ')
+    assert_equal "one, two and three", to_sentence(['one', 'two', 'three'], last_word_connector: ' and ')
+  end
 end