Fix Integer#ceildiv to respect #coerce (#7118)

Fixes [Bug #19343]
Merged-By: mrkn <mrkn@ruby-lang.org>
2023-01-22 18:53:02 +09:00 · 2023-01-22 18:53:02 +09:00 · 20a85ab611 · 2023-01-22 09:53:28 +00:00
commit 20a85ab611
parent cad09f7098
2 changed files with 5 additions and 1 deletions
--- a/numeric.rb
+++ b/numeric.rb
@ -278,7 +278,7 @@ class Integer
  #
  #    3.ceildiv(1.2) # => 3
  def ceildiv(other)
-    -div(-other)
+    -div(0 - other)
  end

  #
--- a/test/ruby/test_integer.rb
+++ b/test/ruby/test_integer.rb
@ -725,5 +725,9 @@ class TestInteger < Test::Unit::TestCase

    assert_equal(10, (10**100-11).ceildiv(10**99-1))
    assert_equal(11, (10**100-9).ceildiv(10**99-1))
+
+    o = Object.new
+    def o.coerce(other); [other, 10]; end
+    assert_equal(124, 1234.ceildiv(o))
  end
 end