Add `exception:` keyword in Kernel#Complex()

Support `exception:` keyword argument in `Kernel#Complex()`.
If `exception:` is `false`, `Kernel#Complex()` returns `nil` if the given
value cannot be interpreted as a complex value.
The default value of `exception:` is `true`.
This is part of [Feature #12732].

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@62760 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 21 insertions, 0 deletions

diff --git a/test/ruby/test_complex.rb b/test/ruby/test_complex.rb
index c2ed1b0827..d8d8fb9cd6 100644
--- a/test/ruby/test_complex.rb
+++ b/test/ruby/test_complex.rb
@@ -746,6 +746,27 @@ class Complex_Test < Test::Unit::TestCase
 
   end
 
+  def test_Complex_without_exception
+    assert_nothing_raised(ArgumentError){
+      assert_equal(nil, Complex('5x', exception: false))
+    }
+    assert_nothing_raised(ArgumentError){
+      assert_equal(nil, Complex(Object.new, exception: false))
+    }
+    assert_nothing_raised(ArgumentError){
+      assert_equal(nil, Complex(1, Object.new, exception: false))
+    }
+
+    o = Object.new
+    def o.to_c; raise; end
+    assert_nothing_raised(ArgumentError){
+      assert_equal(nil, Complex(o, exception: false))
+    }
+    assert_nothing_raised(ArgumentError){
+      assert_equal(nil, Complex(1, o, exception: false))
+    }
+  end
+
   def test_respond
     c = Complex(1,1)
     assert_not_respond_to(c, :%)