1 files changed, 48 insertions, 2 deletions
diff --git a/test/psych/test_string.rb b/test/psych/test_string.rb
index 26a4e201e5..df8fb986bb 100644
--- a/test/psych/test_string.rb
+++ b/test/psych/test_string.rb
@@ -30,8 +30,54 @@ module Psych
     end
 
     def test_doublequotes_when_there_is_a_single
-      yaml = Psych.dump "@123'abc"
-      assert_match(/---\s*"/, yaml)
+      str = "@123'abc"
+      yaml = Psych.dump str
+      assert_match /---\s*"/, yaml
+      assert_equal str, Psych.load(yaml)
+    end
+
+    def test_plain_when_shorten_than_line_width_and_no_final_line_break
+      str = "Lorem ipsum"
+      yaml = Psych.dump str, line_width: 12
+      assert_match /---\s*[^>|]+\n/, yaml
+      assert_equal str, Psych.load(yaml)
+    end
+
+    def test_plain_when_shorten_than_line_width_and_with_final_line_break
+      str = "Lorem ipsum\n"
+      yaml = Psych.dump str, line_width: 12
+      assert_match /---\s*[^>|]+\n/, yaml
+      assert_equal str, Psych.load(yaml)
+    end
+
+    def test_folded_when_longer_than_line_width_and_with_final_line_break
+      str = "Lorem ipsum dolor sit\n"
+      yaml = Psych.dump str, line_width: 12
+      assert_match /---\s*>\n(.*\n){2}\Z/, yaml
+      assert_equal str, Psych.load(yaml)
+    end
+
+    # http://yaml.org/spec/1.2/2009-07-21/spec.html#id2593651
+    def test_folded_strip_when_longer_than_line_width_and_no_newlines
+      str = "Lorem ipsum dolor sit amet, consectetur"
+      yaml = Psych.dump str, line_width: 12
+      assert_match /---\s*>-\n(.*\n){3}\Z/, yaml
+      assert_equal str, Psych.load(yaml)
+    end
+
+    def test_literal_when_inner_and_final_line_break
+      str = "Lorem ipsum\ndolor\n"
+      yaml = Psych.dump str, line_width: 12
+      assert_match /---\s*|\n(.*\n){2}\Z/, yaml
+      assert_equal str, Psych.load(yaml)
+    end
+
+    # http://yaml.org/spec/1.2/2009-07-21/spec.html#id2593651
+    def test_literal_strip_when_inner_line_break_and_no_final_line_break
+      str = "Lorem ipsum\ndolor"
+      yaml = Psych.dump str, line_width: 12
+      assert_match /---\s*|-\n(.*\n){2}\Z/, yaml
+      assert_equal str, Psych.load(yaml)
     end
 
     def test_cycle_x