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# frozen_string_literal: true
require "cases/helper"
module ActiveModel
module Type
class DecimalTest < ActiveSupport::TestCase
def test_type_cast_decimal
type = Decimal.new
assert_equal BigDecimal("0"), type.cast(BigDecimal("0"))
assert_equal BigDecimal("123"), type.cast(123.0)
assert_equal BigDecimal("1"), type.cast(:"1")
end
def test_type_cast_decimal_from_invalid_string
type = Decimal.new
assert_nil type.cast("")
assert_equal BigDecimal("1"), type.cast("1ignore")
assert_equal BigDecimal("0"), type.cast("bad1")
assert_equal BigDecimal("0"), type.cast("bad")
end
def test_type_cast_decimal_from_float_with_large_precision
type = Decimal.new(precision: ::Float::DIG + 2)
assert_equal BigDecimal("123.0"), type.cast(123.0)
end
def test_type_cast_from_float_with_unspecified_precision
type = Decimal.new
assert_equal 22.68.to_d, type.cast(22.68)
end
def test_type_cast_decimal_from_rational_with_precision
type = Decimal.new(precision: 2)
assert_equal BigDecimal("0.33"), type.cast(Rational(1, 3))
end
def test_type_cast_decimal_from_rational_with_precision_and_scale
type = Decimal.new(precision: 4, scale: 2)
assert_equal BigDecimal("0.33"), type.cast(Rational(1, 3))
end
def test_type_cast_decimal_from_rational_without_precision_defaults_to_18_36
type = Decimal.new
assert_equal BigDecimal("0.333333333333333333E0"), type.cast(Rational(1, 3))
end
def test_type_cast_decimal_from_object_responding_to_d
value = Object.new
def value.to_d
BigDecimal("1")
end
type = Decimal.new
assert_equal BigDecimal("1"), type.cast(value)
end
def test_changed?
type = Decimal.new
assert type.changed?(0.0, 0, "wibble")
assert type.changed?(5.0, 0, "wibble")
assert_not type.changed?(5.0, 5.0, "5.0wibble")
assert_not type.changed?(5.0, 5.0, "5.0")
assert_not type.changed?(-5.0, -5.0, "-5.0")
assert_not type.changed?(5.0, 5.0, "0.5e+1")
end
def test_scale_is_applied_before_precision_to_prevent_rounding_errors
type = Decimal.new(precision: 5, scale: 3)
assert_equal BigDecimal("1.250"), type.cast(1.250473853637869)
assert_equal BigDecimal("1.250"), type.cast("1.250473853637869")
end
end
end
end
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