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-rw-r--r--activesupport/test/core_ext/enumerable_test.rb8
1 files changed, 7 insertions, 1 deletions
diff --git a/activesupport/test/core_ext/enumerable_test.rb b/activesupport/test/core_ext/enumerable_test.rb
index 3180755e5f..0590846b7b 100644
--- a/activesupport/test/core_ext/enumerable_test.rb
+++ b/activesupport/test/core_ext/enumerable_test.rb
@@ -44,7 +44,13 @@ class EnumerableTests < Test::Unit::TestCase
assert_raise(TypeError) { payments.sum(&:price) }
assert_equal 60, payments.sum { |p| p.price.to_i * 2 }
end
-
+
+ def test_empty_sums
+ assert_equal 0, [].sum
+ assert_equal 0, [].sum { |i| i }
+ assert_equal Payment.new(0), [].sum(Payment.new(0))
+ end
+
def test_index_by
payments = [ Payment.new(5), Payment.new(15), Payment.new(10) ]
assert_equal(