From a678c47f6d31977e2a91cc198f115c803f0fc8e1 Mon Sep 17 00:00:00 2001 From: Kenta Murata Date: Sat, 30 Apr 2016 19:54:49 +0900 Subject: [PATCH] Fix initial value effects for sum along to ruby 2.4 Signed-off-by: Jeremy Daer --- .../lib/active_support/core_ext/enumerable.rb | 12 +-- .../test/core_ext/enumerable_test.rb | 78 +++++++++++++++++++ 2 files changed, 85 insertions(+), 5 deletions(-) diff --git a/activesupport/lib/active_support/core_ext/enumerable.rb b/activesupport/lib/active_support/core_ext/enumerable.rb index 941f20c19d..eae964bc2e 100644 --- a/activesupport/lib/active_support/core_ext/enumerable.rb +++ b/activesupport/lib/active_support/core_ext/enumerable.rb @@ -17,11 +17,12 @@ module Enumerable # The default sum of an empty list is zero. You can override this default: # # [].sum(Payment.new(0)) { |i| i.amount } # => Payment.new(0) - def sum(identity = 0, &block) + def sum(identity = nil, &block) if block_given? map(&block).sum(identity) else - inject(:+) || identity + sum = identity ? inject(identity, :+) : inject(:+) + sum || identity || 0 end end @@ -91,15 +92,16 @@ def pluck(*keys) class Range #:nodoc: # Optimize range sum to use arithmetic progression if a block is not given and # we have a range of numeric values. - def sum(identity = 0) + def sum(identity = nil) if block_given? || !(first.is_a?(Integer) && last.is_a?(Integer)) super else actual_last = exclude_end? ? (last - 1) : last if actual_last >= first - (actual_last - first + 1) * (actual_last + first) / 2 + sum = identity || 0 + sum + (actual_last - first + 1) * (actual_last + first) / 2 else - identity + identity || 0 end end end diff --git a/activesupport/test/core_ext/enumerable_test.rb b/activesupport/test/core_ext/enumerable_test.rb index 976c8b2b81..99c3236c35 100644 --- a/activesupport/test/core_ext/enumerable_test.rb +++ b/activesupport/test/core_ext/enumerable_test.rb @@ -22,6 +22,11 @@ def each end end + def assert_typed_equal(e, v, cls, msg=nil) + assert_kind_of(cls, v, msg) + assert_equal(e, v, msg) + end + def test_sums enum = GenericEnumerable.new([5, 15, 10]) assert_equal 30, enum.sum @@ -38,6 +43,40 @@ def test_sums payments = GenericEnumerable.new([ SummablePayment.new(5), SummablePayment.new(15) ]) assert_equal SummablePayment.new(20), payments.sum assert_equal SummablePayment.new(20), payments.sum { |p| p } + + sum = GenericEnumerable.new([3, 5.quo(1)]).sum + assert_typed_equal(8, sum, Rational) + + sum = GenericEnumerable.new([3, 5.quo(1)]).sum(0.0) + assert_typed_equal(8.0, sum, Float) + + sum = GenericEnumerable.new([3, 5.quo(1), 7.0]).sum + assert_typed_equal(15.0, sum, Float) + + sum = GenericEnumerable.new([3, 5.quo(1), Complex(7)]).sum + assert_typed_equal(Complex(15), sum, Complex) + assert_typed_equal(15, sum.real, Rational) + assert_typed_equal(0, sum.imag, Integer) + + sum = GenericEnumerable.new([3.5, 5]).sum + assert_typed_equal(8.5, sum, Float) + + sum = GenericEnumerable.new([2, 8.5]).sum + assert_typed_equal(10.5, sum, Float) + + sum = GenericEnumerable.new([1.quo(2), 1]).sum + assert_typed_equal(3.quo(2), sum, Rational) + + sum = GenericEnumerable.new([1.quo(2), 1.quo(3)]).sum + assert_typed_equal(5.quo(6), sum, Rational) + + sum = GenericEnumerable.new([2.0, 3.0*Complex::I]).sum + assert_typed_equal(Complex(2.0, 3.0), sum, Complex) + assert_typed_equal(2.0, sum.real, Float) + assert_typed_equal(3.0, sum.imag, Float) + + sum = GenericEnumerable.new([1, 2]).sum(10) {|v| v * 2 } + assert_typed_equal(16, sum, Integer) end def test_nil_sums @@ -55,6 +94,7 @@ def test_empty_sums assert_equal 0, GenericEnumerable.new([]).sum assert_equal 0, GenericEnumerable.new([]).sum { |i| i + 10 } assert_equal Payment.new(0), GenericEnumerable.new([]).sum(Payment.new(0)) + assert_typed_equal 0.0, GenericEnumerable.new([]).sum(0.0), Float end def test_range_sums @@ -68,6 +108,10 @@ def test_range_sums assert_equal 5, (10..0).sum(5) assert_equal 10, (10..10).sum assert_equal 42, (10...10).sum(42) + assert_typed_equal 20.0, (1..4).sum(0.0) { |i| i * 2 }, Float + assert_typed_equal 10.0, (1..4).sum(0.0), Float + assert_typed_equal 20.0, (1..4).sum(10.0), Float + assert_typed_equal 5.0, (10..0).sum(5.0), Float end def test_array_sums @@ -86,6 +130,40 @@ def test_array_sums payments = [ SummablePayment.new(5), SummablePayment.new(15) ] assert_equal SummablePayment.new(20), payments.sum assert_equal SummablePayment.new(20), payments.sum { |p| p } + + sum = [3, 5.quo(1)].sum + assert_typed_equal(8, sum, Rational) + + sum = [3, 5.quo(1)].sum(0.0) + assert_typed_equal(8.0, sum, Float) + + sum = [3, 5.quo(1), 7.0].sum + assert_typed_equal(15.0, sum, Float) + + sum = [3, 5.quo(1), Complex(7)].sum + assert_typed_equal(Complex(15), sum, Complex) + assert_typed_equal(15, sum.real, Rational) + assert_typed_equal(0, sum.imag, Integer) + + sum = [3.5, 5].sum + assert_typed_equal(8.5, sum, Float) + + sum = [2, 8.5].sum + assert_typed_equal(10.5, sum, Float) + + sum = [1.quo(2), 1].sum + assert_typed_equal(3.quo(2), sum, Rational) + + sum = [1.quo(2), 1.quo(3)].sum + assert_typed_equal(5.quo(6), sum, Rational) + + sum = [2.0, 3.0*Complex::I].sum + assert_typed_equal(Complex(2.0, 3.0), sum, Complex) + assert_typed_equal(2.0, sum.real, Float) + assert_typed_equal(3.0, sum.imag, Float) + + sum = [1, 2].sum(10) {|v| v * 2 } + assert_typed_equal(16, sum, Integer) end def test_index_by -- GitLab