323 lines
11 KiB
Ruby
323 lines
11 KiB
Ruby
# frozen_string_literal: true
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require_relative "../abstract_unit"
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require "active_support/core_ext/array"
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require "active_support/core_ext/enumerable"
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Payment = Struct.new(:price)
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ExpandedPayment = Struct.new(:dollars, :cents)
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class SummablePayment < Payment
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def +(p) self.class.new(price + p.price) end
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end
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class EnumerableTests < ActiveSupport::TestCase
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class GenericEnumerable
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include Enumerable
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def initialize(values = [1, 2, 3])
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@values = values
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end
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def each
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@values.each { |v| yield v }
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end
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end
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def assert_typed_equal(e, v, cls, msg = nil)
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assert_kind_of(cls, v, msg)
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assert_equal(e, v, msg)
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end
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def test_minimum
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payments = GenericEnumerable.new([ Payment.new(5), Payment.new(15), Payment.new(10) ])
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assert_equal 5, payments.minimum(:price)
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end
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def test_minimum_with_empty_enumerable
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payments = GenericEnumerable.new([])
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assert_nil payments.minimum(:price)
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end
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def test_maximum
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payments = GenericEnumerable.new([ Payment.new(5), Payment.new(15), Payment.new(10) ])
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assert_equal 15, payments.maximum(:price)
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end
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def test_maximum_with_empty_enumerable
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payments = GenericEnumerable.new([])
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assert_nil payments.maximum(:price)
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end
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def test_sums
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enum = GenericEnumerable.new([5, 15, 10])
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assert_equal 30, enum.sum
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assert_equal 60, enum.sum { |i| i * 2 }
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enum = GenericEnumerable.new(%w(a b c))
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assert_equal "abc", enum.sum
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assert_equal "aabbcc", enum.sum { |i| i * 2 }
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payments = GenericEnumerable.new([ Payment.new(5), Payment.new(15), Payment.new(10) ])
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assert_equal 30, payments.sum(&:price)
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assert_equal 60, payments.sum { |p| p.price * 2 }
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payments = GenericEnumerable.new([ SummablePayment.new(5), SummablePayment.new(15) ])
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assert_equal SummablePayment.new(20), payments.sum
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assert_equal SummablePayment.new(20), payments.sum { |p| p }
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sum = GenericEnumerable.new([3, 5.quo(1)]).sum
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assert_typed_equal(8, sum, Rational)
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sum = GenericEnumerable.new([3, 5.quo(1)]).sum(0.0)
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assert_typed_equal(8.0, sum, Float)
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sum = GenericEnumerable.new([3, 5.quo(1), 7.0]).sum
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assert_typed_equal(15.0, sum, Float)
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sum = GenericEnumerable.new([3, 5.quo(1), Complex(7)]).sum
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assert_typed_equal(Complex(15), sum, Complex)
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assert_typed_equal(15, sum.real, Rational)
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assert_typed_equal(0, sum.imag, Integer)
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sum = GenericEnumerable.new([3.5, 5]).sum
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assert_typed_equal(8.5, sum, Float)
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sum = GenericEnumerable.new([2, 8.5]).sum
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assert_typed_equal(10.5, sum, Float)
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sum = GenericEnumerable.new([1.quo(2), 1]).sum
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assert_typed_equal(3.quo(2), sum, Rational)
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sum = GenericEnumerable.new([1.quo(2), 1.quo(3)]).sum
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assert_typed_equal(5.quo(6), sum, Rational)
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sum = GenericEnumerable.new([2.0, 3.0 * Complex::I]).sum
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assert_typed_equal(Complex(2.0, 3.0), sum, Complex)
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assert_typed_equal(2.0, sum.real, Float)
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assert_typed_equal(3.0, sum.imag, Float)
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sum = GenericEnumerable.new([1, 2]).sum(10) { |v| v * 2 }
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assert_typed_equal(16, sum, Integer)
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end
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def test_nil_sums
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expected_raise = TypeError
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assert_raise(expected_raise) { GenericEnumerable.new([5, 15, nil]).sum }
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payments = GenericEnumerable.new([ Payment.new(5), Payment.new(15), Payment.new(10), Payment.new(nil) ])
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assert_raise(expected_raise) { payments.sum(&:price) }
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assert_equal 60, payments.sum { |p| p.price.to_i * 2 }
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end
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def test_empty_sums
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assert_equal 0, GenericEnumerable.new([]).sum
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assert_equal 0, GenericEnumerable.new([]).sum { |i| i + 10 }
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assert_equal Payment.new(0), GenericEnumerable.new([]).sum(Payment.new(0))
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assert_typed_equal 0.0, GenericEnumerable.new([]).sum(0.0), Float
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end
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def test_range_sums
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assert_equal 20, (1..4).sum { |i| i * 2 }
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assert_equal 10, (1..4).sum
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assert_equal 10, (1..4.5).sum
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assert_equal 6, (1...4).sum
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assert_equal "abc", ("a".."c").sum
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assert_equal 50_000_005_000_000, (0..10_000_000).sum
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assert_equal 0, (10..0).sum
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assert_equal 5, (10..0).sum(5)
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assert_equal 10, (10..10).sum
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assert_equal 42, (10...10).sum(42)
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assert_typed_equal 20.0, (1..4).sum(0.0) { |i| i * 2 }, Float
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assert_typed_equal 10.0, (1..4).sum(0.0), Float
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assert_typed_equal 20.0, (1..4).sum(10.0), Float
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assert_typed_equal 5.0, (10..0).sum(5.0), Float
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end
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def test_array_sums
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enum = [5, 15, 10]
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assert_equal 30, enum.sum
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assert_equal 60, enum.sum { |i| i * 2 }
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enum = %w(a b c)
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assert_equal "abc", enum.sum
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assert_equal "aabbcc", enum.sum { |i| i * 2 }
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payments = [ Payment.new(5), Payment.new(15), Payment.new(10) ]
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assert_equal 30, payments.sum(&:price)
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assert_equal 60, payments.sum { |p| p.price * 2 }
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payments = [ SummablePayment.new(5), SummablePayment.new(15) ]
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assert_equal SummablePayment.new(20), payments.sum
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assert_equal SummablePayment.new(20), payments.sum { |p| p }
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sum = [3, 5.quo(1)].sum
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assert_typed_equal(8, sum, Rational)
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sum = [3, 5.quo(1)].sum(0.0)
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assert_typed_equal(8.0, sum, Float)
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sum = [3, 5.quo(1), 7.0].sum
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assert_typed_equal(15.0, sum, Float)
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sum = [3, 5.quo(1), Complex(7)].sum
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assert_typed_equal(Complex(15), sum, Complex)
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assert_typed_equal(15, sum.real, Rational)
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assert_typed_equal(0, sum.imag, Integer)
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sum = [3.5, 5].sum
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assert_typed_equal(8.5, sum, Float)
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sum = [2, 8.5].sum
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assert_typed_equal(10.5, sum, Float)
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sum = [1.quo(2), 1].sum
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assert_typed_equal(3.quo(2), sum, Rational)
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sum = [1.quo(2), 1.quo(3)].sum
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assert_typed_equal(5.quo(6), sum, Rational)
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sum = [2.0, 3.0 * Complex::I].sum
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assert_typed_equal(Complex(2.0, 3.0), sum, Complex)
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assert_typed_equal(2.0, sum.real, Float)
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assert_typed_equal(3.0, sum.imag, Float)
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sum = [1, 2].sum(10) { |v| v * 2 }
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assert_typed_equal(16, sum, Integer)
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end
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def test_index_by
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payments = GenericEnumerable.new([ Payment.new(5), Payment.new(15), Payment.new(10) ])
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assert_equal({ 5 => Payment.new(5), 15 => Payment.new(15), 10 => Payment.new(10) },
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payments.index_by(&:price))
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assert_equal Enumerator, payments.index_by.class
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assert_nil payments.index_by.size
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assert_equal 42, (1..42).index_by.size
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assert_equal({ 5 => Payment.new(5), 15 => Payment.new(15), 10 => Payment.new(10) },
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payments.index_by.each(&:price))
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end
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def test_index_with
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payments = GenericEnumerable.new([ Payment.new(5), Payment.new(15), Payment.new(10) ])
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assert_equal({ Payment.new(5) => 5, Payment.new(15) => 15, Payment.new(10) => 10 }, payments.index_with(&:price))
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assert_equal({ title: nil, body: nil }, %i( title body ).index_with(nil))
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assert_equal({ title: [], body: [] }, %i( title body ).index_with([]))
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assert_equal({ title: {}, body: {} }, %i( title body ).index_with({}))
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assert_equal Enumerator, payments.index_with.class
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assert_nil payments.index_with.size
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assert_equal 42, (1..42).index_with.size
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assert_equal({ Payment.new(5) => 5, Payment.new(15) => 15, Payment.new(10) => 10 }, payments.index_with.each(&:price))
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end
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def test_many
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assert_equal false, GenericEnumerable.new([]).many?
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assert_equal false, GenericEnumerable.new([ 1 ]).many?
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assert_equal true, GenericEnumerable.new([ 1, 2 ]).many?
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assert_equal false, GenericEnumerable.new([]).many? { |x| x > 1 }
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assert_equal false, GenericEnumerable.new([ 2 ]).many? { |x| x > 1 }
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assert_equal false, GenericEnumerable.new([ 1, 2 ]).many? { |x| x > 1 }
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assert_equal true, GenericEnumerable.new([ 1, 2, 2 ]).many? { |x| x > 1 }
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end
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def test_many_iterates_only_on_what_is_needed
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infinity = 1.0 / 0.0
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very_long_enum = 0..infinity
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assert_equal true, very_long_enum.many?
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assert_equal true, very_long_enum.many? { |x| x > 100 }
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end
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def test_exclude?
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assert_equal true, GenericEnumerable.new([ 1 ]).exclude?(2)
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assert_equal false, GenericEnumerable.new([ 1 ]).exclude?(1)
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end
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def test_excluding
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assert_equal [1, 2, 4], GenericEnumerable.new((1..5).to_a).excluding(3, 5)
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assert_equal [3, 4, 5], GenericEnumerable.new((1..5).to_a).excluding([1, 2])
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assert_equal [[0, 1]], GenericEnumerable.new([[0, 1], [1, 0]]).excluding([[1, 0]])
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assert_equal [1, 2, 4], (1..5).to_a.excluding(3, 5)
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assert_equal [1, 2, 4], (1..5).to_set.excluding(3, 5)
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assert_equal({ foo: 1, baz: 3 }, { foo: 1, bar: 2, baz: 3 }.excluding(:bar))
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end
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def test_without
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assert_equal [1, 2, 4], GenericEnumerable.new((1..5).to_a).without(3, 5)
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assert_equal [3, 4, 5], GenericEnumerable.new((1..5).to_a).without([1, 2])
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end
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def test_pluck
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payments = GenericEnumerable.new([ Payment.new(5), Payment.new(15), Payment.new(10) ])
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assert_equal [5, 15, 10], payments.pluck(:price)
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payments = GenericEnumerable.new([
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ExpandedPayment.new(5, 99),
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ExpandedPayment.new(15, 0),
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ExpandedPayment.new(10, 50)
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])
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assert_equal [[5, 99], [15, 0], [10, 50]], payments.pluck(:dollars, :cents)
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assert_equal [], [].pluck(:price)
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assert_equal [], [].pluck(:dollars, :cents)
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end
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def test_pick
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payments = GenericEnumerable.new([ Payment.new(5), Payment.new(15), Payment.new(10) ])
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assert_equal 5, payments.pick(:price)
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payments = GenericEnumerable.new([
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ExpandedPayment.new(5, 99),
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ExpandedPayment.new(15, 0),
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ExpandedPayment.new(10, 50)
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])
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assert_equal [5, 99], payments.pick(:dollars, :cents)
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assert_nil [].pick(:price)
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assert_nil [].pick(:dollars, :cents)
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end
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def test_compact_blank
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values = GenericEnumerable.new([1, "", nil, 2, " ", [], {}, false, true])
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assert_equal [1, 2, true], values.compact_blank
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end
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def test_array_compact_blank!
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values = [1, "", nil, 2, " ", [], {}, false, true]
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values.compact_blank!
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assert_equal [1, 2, true], values
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end
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def test_hash_compact_blank
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values = { a: "", b: 1, c: nil, d: [], e: false, f: true }
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assert_equal({ b: 1, f: true }, values.compact_blank)
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end
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def test_hash_compact_blank!
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values = { a: "", b: 1, c: nil, d: [], e: false, f: true }
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values.compact_blank!
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assert_equal({ b: 1, f: true }, values)
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end
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def test_in_order_of
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values = [ Payment.new(5), Payment.new(1), Payment.new(3) ]
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assert_equal [ Payment.new(1), Payment.new(5), Payment.new(3) ], values.in_order_of(:price, [ 1, 5, 3 ])
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end
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def test_in_order_of_ignores_missing_series
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values = [ Payment.new(5), Payment.new(1), Payment.new(3) ]
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assert_equal [ Payment.new(1), Payment.new(5), Payment.new(3) ], values.in_order_of(:price, [ 1, 2, 4, 5, 3 ])
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end
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def test_in_order_of_drops_elements_not_named_in_series
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values = [ Payment.new(5), Payment.new(1), Payment.new(3) ]
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assert_equal [ Payment.new(1), Payment.new(5) ], values.in_order_of(:price, [ 1, 5 ])
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end
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end
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