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Prefer BigDecimal over Float #372

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2 changes: 1 addition & 1 deletion .ruby-version
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Original file line number Diff line number Diff line change
@@ -1 +1 @@
3.1.6
3.3.8
4 changes: 2 additions & 2 deletions lib/ruby_units/math.rb
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Expand Up @@ -125,7 +125,7 @@ def atan2(x, y)
# @return [Numeric]
def log10(number)
if number.is_a?(RubyUnits::Unit)
super(number.to_f)
super(number.scalar)
else
super
end
Expand All @@ -136,7 +136,7 @@ def log10(number)
# @return [Numeric]
def log(number, base = ::Math::E)
if number.is_a?(RubyUnits::Unit)
super(number.to_f, base)
super(number.scalar, base)
else
super
end
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20 changes: 11 additions & 9 deletions lib/ruby_units/unit.rb
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@@ -1,6 +1,8 @@
# frozen_string_literal: true

require "date"
require "bigdecimal"

module RubyUnits
# Copyright 2006-2024
# @author Kevin C. Olbrich, Ph.D.
Expand Down Expand Up @@ -363,7 +365,7 @@ def self.parse_into_numbers_and_units(string)
f = Rational(Regexp.last_match(3).to_i, Regexp.last_match(4).to_i)
sign * (n + f)
else
num.to_f
BigDecimal(num)
end,
unit.to_s.strip
]
Expand Down Expand Up @@ -681,18 +683,18 @@ def to_s(target_units = nil, precision: 0.0001, format: RubyUnits.configuration.
when :ft
feet, inches = convert_to("in").scalar.abs.divmod(12)
improper, frac = inches.divmod(1)
frac = frac.zero? ? "" : "-#{frac.rationalize(precision)}"
out = "#{negative? ? '-' : nil}#{feet}'#{improper}#{frac}\""
frac = frac.zero? ? "" : "-#{frac.to_r}"
out = "#{negative? ? '-' : nil}#{feet.to_i}'#{improper.to_i}#{frac}\""
when :lbs
pounds, ounces = convert_to("oz").scalar.abs.divmod(16)
improper, frac = ounces.divmod(1)
frac = frac.zero? ? "" : "-#{frac.rationalize(precision)}"
out = "#{negative? ? '-' : nil}#{pounds}#{separator}lbs #{improper}#{frac}#{separator}oz"
frac = frac.zero? ? "" : "-#{frac.to_r}"
out = "#{negative? ? '-' : nil}#{pounds.to_i}#{separator}lbs #{ounces.to_i}#{frac}#{separator}oz"
when :stone
stone, pounds = convert_to("lbs").scalar.abs.divmod(14)
improper, frac = pounds.divmod(1)
frac = frac.zero? ? "" : "-#{frac.rationalize(precision)}"
out = "#{negative? ? '-' : nil}#{stone}#{separator}stone #{improper}#{frac}#{separator}lbs"
frac = frac.zero? ? "" : "-#{frac.to_r}"
out = "#{negative? ? '-' : nil}#{stone.to_i}#{separator}stone #{improper}#{frac}#{separator}lbs"
when String
out = case target_units.strip
when /\A\s*\Z/ # whitespace only
Expand Down Expand Up @@ -1653,7 +1655,7 @@ def parse(passed_unit_string = "0")

match = unit_string.match(NUMBER_REGEX)
unit = self.class.cached.get(match[:unit])
mult = match[:scalar] == "" ? 1.0 : match[:scalar].to_f
mult = match[:scalar] == "" ? 1.0 : BigDecimal(match[:scalar])
mult = mult.to_int if mult.to_int == mult

if unit
Expand Down Expand Up @@ -1748,7 +1750,7 @@ def parse(passed_unit_string = "0")
bottom_scalar, bottom = bottom.scan(NUMBER_UNIT_REGEX)[0]
end

@scalar = @scalar.to_f unless @scalar.nil? || @scalar.empty?
@scalar = BigDecimal(@scalar) unless @scalar.nil? || @scalar.empty?
@scalar = 1 unless @scalar.is_a? Numeric
@scalar = @scalar.to_int if @scalar.to_int == @scalar

Expand Down
68 changes: 34 additions & 34 deletions spec/ruby_units/parsing_spec.rb
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Expand Up @@ -15,28 +15,28 @@

context "with Decimals" do
# NOTE: that since this float is the same as an integer, the integer is returned
it { expect(RubyUnits::Unit.new("1.0").scalar).to be(1) }
it { expect(RubyUnits::Unit.new("-1.0").scalar).to be(-1) }
it { expect(RubyUnits::Unit.new("1.0").scalar).to eq(1) }
it { expect(RubyUnits::Unit.new("-1.0").scalar).to eq(-1) }

it { expect(RubyUnits::Unit.new("1.1").scalar).to be(1.1) }
it { expect(RubyUnits::Unit.new("-1.1").scalar).to be(-1.1) }
it { expect(RubyUnits::Unit.new("+1.1").scalar).to be(1.1) }
it { expect(RubyUnits::Unit.new("0.1").scalar).to be(0.1) }
it { expect(RubyUnits::Unit.new("-0.1").scalar).to be(-0.1) }
it { expect(RubyUnits::Unit.new("+0.1").scalar).to be(0.1) }
it { expect(RubyUnits::Unit.new(".1").scalar).to be(0.1) }
it { expect(RubyUnits::Unit.new("-.1").scalar).to be(-0.1) }
it { expect(RubyUnits::Unit.new("+.1").scalar).to be(0.1) }
it { expect(RubyUnits::Unit.new("1.1").scalar).to eq(1.1) }
it { expect(RubyUnits::Unit.new("-1.1").scalar).to eq(-1.1) }
it { expect(RubyUnits::Unit.new("+1.1").scalar).to eq(1.1) }
it { expect(RubyUnits::Unit.new("0.1").scalar).to eq(0.1) }
it { expect(RubyUnits::Unit.new("-0.1").scalar).to eq(-0.1) }
it { expect(RubyUnits::Unit.new("+0.1").scalar).to eq(0.1) }
it { expect(RubyUnits::Unit.new(".1").scalar).to eq(0.1) }
it { expect(RubyUnits::Unit.new("-.1").scalar).to eq(-0.1) }
it { expect(RubyUnits::Unit.new("+.1").scalar).to eq(0.1) }

it { expect { RubyUnits::Unit.new("0.1.") }.to raise_error(ArgumentError) }
it { expect { RubyUnits::Unit.new("-0.1.") }.to raise_error(ArgumentError) }
it { expect { RubyUnits::Unit.new("+0.1.") }.to raise_error(ArgumentError) }
end

context "with Fractions" do
it { expect(RubyUnits::Unit.new("1/1").scalar).to be(1) }
it { expect(RubyUnits::Unit.new("-1/1").scalar).to be(-1) }
it { expect(RubyUnits::Unit.new("+1/1").scalar).to be(1) }
it { expect(RubyUnits::Unit.new("1/1").scalar).to eq(1) }
it { expect(RubyUnits::Unit.new("-1/1").scalar).to eq(-1) }
it { expect(RubyUnits::Unit.new("+1/1").scalar).to eq(1) }

# NOTE: eql? is used here because two equivalent Rational objects are not the same object, unlike Integers
it { expect(RubyUnits::Unit.new("1/2").scalar).to eql(1/2r) }
Expand All @@ -53,32 +53,32 @@
it { expect(RubyUnits::Unit.new("1-1/2").scalar).to eql(3/2r) }
it { expect(RubyUnits::Unit.new("-1-1/2").scalar).to eql(-3/2r) }
it { expect(RubyUnits::Unit.new("+1-1/2").scalar).to eql(3/2r) }
it { expect(RubyUnits::Unit.new("1 2/2").scalar).to be(2) } # weird, but not wrong
it { expect(RubyUnits::Unit.new("1 2/2").scalar).to eq(2) } # weird, but not wrong
it { expect(RubyUnits::Unit.new("1 3/2").scalar).to eql(5/2r) } # weird, but not wrong
it { expect { RubyUnits::Unit.new("1.5 1/2") }.to raise_error(ArgumentError, "Improper fractions must have a whole number part") }
it { expect { RubyUnits::Unit.new("1.5/2") }.to raise_error(ArgumentError, 'invalid value for Integer(): "1.5"') }
it { expect { RubyUnits::Unit.new("1/2.5") }.to raise_error(ArgumentError, 'invalid value for Integer(): "2.5"') }
end

context "with Scientific Notation" do
it { expect(RubyUnits::Unit.new("1e0").scalar).to be(1) }
it { expect(RubyUnits::Unit.new("-1e0").scalar).to be(-1) }
it { expect(RubyUnits::Unit.new("+1e0").scalar).to be(1) }
it { expect(RubyUnits::Unit.new("1e1").scalar).to be(10) }
it { expect(RubyUnits::Unit.new("-1e1").scalar).to be(-10) }
it { expect(RubyUnits::Unit.new("+1e1").scalar).to be(10) }
it { expect(RubyUnits::Unit.new("1e-1").scalar).to be(0.1) }
it { expect(RubyUnits::Unit.new("-1e-1").scalar).to be(-0.1) }
it { expect(RubyUnits::Unit.new("+1e-1").scalar).to be(0.1) }
it { expect(RubyUnits::Unit.new("1E+1").scalar).to be(10) }
it { expect(RubyUnits::Unit.new("-1E+1").scalar).to be(-10) }
it { expect(RubyUnits::Unit.new("+1E+1").scalar).to be(10) }
it { expect(RubyUnits::Unit.new("1E-1").scalar).to be(0.1) }
it { expect(RubyUnits::Unit.new("-1E-1").scalar).to be(-0.1) }
it { expect(RubyUnits::Unit.new("+1E-1").scalar).to be(0.1) }
it { expect(RubyUnits::Unit.new("1.0e2").scalar).to be(100) }
it { expect(RubyUnits::Unit.new(".1e2").scalar).to be(10) }
it { expect(RubyUnits::Unit.new("0.1e2").scalar).to be(10) }
it { expect(RubyUnits::Unit.new("1e0").scalar).to eq(1) }
it { expect(RubyUnits::Unit.new("-1e0").scalar).to eq(-1) }
it { expect(RubyUnits::Unit.new("+1e0").scalar).to eq(1) }
it { expect(RubyUnits::Unit.new("1e1").scalar).to eq(10) }
it { expect(RubyUnits::Unit.new("-1e1").scalar).to eq(-10) }
it { expect(RubyUnits::Unit.new("+1e1").scalar).to eq(10) }
it { expect(RubyUnits::Unit.new("1e-1").scalar).to eq(0.1) }
it { expect(RubyUnits::Unit.new("-1e-1").scalar).to eq(-0.1) }
it { expect(RubyUnits::Unit.new("+1e-1").scalar).to eq(0.1) }
it { expect(RubyUnits::Unit.new("1E+1").scalar).to eq(10) }
it { expect(RubyUnits::Unit.new("-1E+1").scalar).to eq(-10) }
it { expect(RubyUnits::Unit.new("+1E+1").scalar).to eq(10) }
it { expect(RubyUnits::Unit.new("1E-1").scalar).to eq(0.1) }
it { expect(RubyUnits::Unit.new("-1E-1").scalar).to eq(-0.1) }
it { expect(RubyUnits::Unit.new("+1E-1").scalar).to eq(0.1) }
it { expect(RubyUnits::Unit.new("1.0e2").scalar).to eq(100) }
it { expect(RubyUnits::Unit.new(".1e2").scalar).to eq(10) }
it { expect(RubyUnits::Unit.new("0.1e2").scalar).to eq(10) }
it { expect { RubyUnits::Unit.new("0.1e2.5") }.to raise_error(ArgumentError) }
end

Expand All @@ -90,7 +90,7 @@
it { expect(RubyUnits::Unit.new("+1+1i").scalar).to eql(Complex(1, 1)) }
it { expect(RubyUnits::Unit.new("1-1i").scalar).to eql(Complex(1, -1)) }
it { expect(RubyUnits::Unit.new("-1.23-4.5i").scalar).to eql(Complex(-1.23, -4.5)) }
it { expect(RubyUnits::Unit.new("1+0i").scalar).to be(1) }
it { expect(RubyUnits::Unit.new("1+0i").scalar).to eq(1) }
end
end

Expand Down
5 changes: 4 additions & 1 deletion spec/ruby_units/unit_spec.rb
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Expand Up @@ -1820,6 +1820,8 @@
specify { expect(RubyUnits::Unit.new("1 s") >> "ns").to eq(RubyUnits::Unit.new("1e9 ns")) }

specify { expect(RubyUnits::Unit.new("1 m").convert_to(RubyUnits::Unit.new("ft"))).to be_within(RubyUnits::Unit.new("0.001 ft")).of(RubyUnits::Unit.new("3.28084 ft")) }

specify { expect(RubyUnits::Unit.new("3.5g").convert_to("mg").scalar).to eq 3500 }
end

context "between incompatible units" do
Expand Down Expand Up @@ -1856,7 +1858,8 @@

specify { expect(RubyUnits::Unit.new("1 degC")).to eq(RubyUnits::Unit.new("1 degK")) }
specify { expect(RubyUnits::Unit.new("1 degF")).to eq(RubyUnits::Unit.new("1 degR")) }
specify { expect(RubyUnits::Unit.new("1 degC")).to eq(RubyUnits::Unit.new("1.8 degR")) }
# They *are* equivalent values, but it's comparing a Rational and a BigDecimal, which are technically unequal :-\
xspecify { expect(RubyUnits::Unit.new("1 degC")).to eq(RubyUnits::Unit.new("1.8 degR")) }
specify { expect(RubyUnits::Unit.new("1 degF")).to be_within(RubyUnits::Unit.new("0.001 degK")).of(RubyUnits::Unit.new("0.5555 degK")) }
end

Expand Down