1 files changed, 26 insertions, 0 deletions
diff --git a/activesupport/test/core_ext/regexp_ext_test.rb b/activesupport/test/core_ext/regexp_ext_test.rb
new file mode 100644
index 0000000000..f71099856d
--- /dev/null
+++ b/activesupport/test/core_ext/regexp_ext_test.rb
@@ -0,0 +1,26 @@
+class RegexpExtAccessTests < Test::Unit::TestCase
+  def test_number_of_captures
+    assert_equal 0, //.number_of_captures
+    assert_equal 1, /.(.)./.number_of_captures
+    assert_equal 2, /.(.).(?:.).(.)/.number_of_captures
+    assert_equal 3, /.((.).(?:.).(.))/.number_of_captures
+  end
+
+  def test_multiline
+    assert   //m.multiline?
+    assert ! //.multiline?
+    assert ! /(?m:)/.multiline?
+  end
+
+  def test_optionalize
+    assert "a?", Regexp.optionalize("a")
+    assert "(?:foo)?", Regexp.optionalize("foo")
+    assert "", Regexp.optionalize("")
+  end
+
+  def test_unoptionalize
+    assert "a", Regexp.unoptionalize("a?")
+    assert "foo", Regexp.unoptionalize("(?:foo)")
+    assert "", Regexp.unoptionalize("")
+  end
+end
+\ No newline at end of file