mrkn	2018-12-24 03:54:51 +0900 (Mon, 24 Dec 2018)

  New Revision: 66518

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=66518

  Log:
    Add test case of ArithmeticSequence#sum

  Modified files:
    trunk/test/ruby/test_arithmetic_sequence.rb
Index: test/ruby/test_arithmetic_sequence.rb
===================================================================
--- test/ruby/test_arithmetic_sequence.rb	(revision 66517)
+++ test/ruby/test_arithmetic_sequence.rb	(revision 66518)
@@ -430,4 +430,10 @@ class TestArithmeticSequence < Test::Uni https://github.com/ruby/ruby/blob/trunk/test/ruby/test_arithmetic_sequence.rb#L430
     assert_num_equal_type([0.0, 0.0+1.0i, 0.0+2.0i], (0.0..).step(1.0i).take(3))
     assert_num_equal_type([0.0+0.0i, 0.0+1.0i, 0.0+2.0i], (0.0i..).step(1.0i).take(3))
   end
+
+  def test_sum
+    assert_equal([1, 3, 5, 7, 9].sum, (1..10).step(2).sum)
+    assert_equal([1.0, 2.5, 4.0, 5.5, 7.0, 8.5, 10.0].sum, (1.0..10.0).step(1.5).sum)
+    assert_equal([1/2r, 1r, 3/2r, 2, 5/2r, 3, 7/2r, 4].sum, ((1/2r)...(9/2r)).step(1/2r).sum)
+  end
 end

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