1 files changed, 43 insertions, 0 deletions
diff --git a/test/psych/test_json_tree.rb b/test/psych/test_json_tree.rb
new file mode 100644
index 0000000000..a032f1e64c
--- /dev/null
+++ b/test/psych/test_json_tree.rb
@@ -0,0 +1,43 @@
+require 'test/psych/helper'
+
+module Psych
+  class TestJSONTree < TestCase
+    def test_string
+      assert_match(/(['"])foo\1/, Psych.to_json("foo"))
+    end
+
+    def test_symbol
+      assert_match(/(['"])foo\1/, Psych.to_json(:foo))
+    end
+
+    def test_nil
+      assert_match(/^null/, Psych.to_json(nil))
+    end
+
+    def test_int
+      assert_match(/^10/, Psych.to_json(10))
+    end
+
+    def test_float
+      assert_match(/^1.2/, Psych.to_json(1.2))
+    end
+
+    def test_hash
+      hash = { 'one' => 'two' }
+      json = Psych.to_json(hash)
+      assert_match(/}$/, json)
+      assert_match(/^\{/, json)
+      assert_match(/['"]one['"]/, json)
+      assert_match(/['"]two['"]/, json)
+    end
+
+    def test_list_to_json
+      list = %w{ one two }
+      json = Psych.to_json(list)
+      assert_match(/]$/, json)
+      assert_match(/^\[/, json)
+      assert_match(/['"]one['"]/, json)
+      assert_match(/['"]two['"]/, json)
+    end
+  end
+end