1 files changed, 34 insertions, 0 deletions
diff --git a/test/date/test_date_parse.rb b/test/date/test_date_parse.rb
index fb54d14b23..1504473938 100644
--- a/test/date/test_date_parse.rb
+++ b/test/date/test_date_parse.rb
@@ -1060,4 +1060,38 @@ class TestDateParse < Test::Unit::TestCase
     assert_equal(Date::ITALY + 10, d.start)
   end
 
+  def test_given_string
+    s = '2001-02-03T04:05:06Z'
+    s0 = s.dup
+
+    assert_not_equal({}, Date._parse(s))
+    assert_equal(s0, s)
+
+    assert_not_equal({}, Date._iso8601(s))
+    assert_equal(s0, s)
+
+    assert_not_equal({}, Date._rfc3339(s))
+    assert_equal(s0, s)
+
+    assert_not_equal({}, Date._xmlschema(s))
+    assert_equal(s0, s)
+
+    s = 'Sat, 3 Feb 2001 04:05:06 UT'
+    s0 = s.dup
+    assert_not_equal({}, Date._rfc2822(s))
+    assert_equal(s0, s)
+    assert_not_equal({}, Date._rfc822(s))
+    assert_equal(s0, s)
+
+    s = 'Sat, 03 Feb 2001 04:05:06 GMT'
+    s0 = s.dup
+    assert_not_equal({}, Date._httpdate(s))
+    assert_equal(s0, s)
+
+    s = 'H13.02.03T04:05:06,07Z'
+    s0 = s.dup
+    assert_not_equal({}, Date._jisx0301(s))
+    assert_equal(s0, s)
+  end
+
 end