require 'spec_helper'

describe Virtus::Attribute::Float, '#coerce' do
  subject { attribute.coerce(value) }

  let(:attribute) { described_class.new(:score) }

  context 'with a float' do
    let(:value) { 24.0 }

    it { should eql(value) }
  end

  context 'with a zero string integer' do
    let(:value) { '0' }

    it { should eql(0.0) }
  end

  context 'with a positive string integer' do
    let(:value) { '24' }

    it { should eql(24.0) }
  end

  context 'with a negative string integer' do
    let(:value) { '-24' }

    it { should eql(-24.0) }
  end

  context 'with a zero string float' do
    let(:value) { '0.0' }

    it { should eql(0.0) }
  end

  context 'with a positive string float' do
    let(:value) { '24.35' }

    it { should eql(24.35) }
  end

  context 'with a negative string float' do
    let(:value) { '-24.35' }

    it { should eql(-24.35) }
  end

  context 'with a zero string float, with no leading digits' do
    let(:value) { '.0' }

    it { should eql(0.0) }
  end

  context 'with a positive string float, with no leading digits' do
    let(:value) { '.41' }

    it { should eql(0.41) }
  end

  context 'with a zero integer' do
    let(:value) { 0 }

    it { should eql(0.0) }
  end

  context 'with a positive integer' do
    let(:value) { 24 }

    it { should eql(24.0) }
  end

  context 'with a negative integer' do
    let(:value) { -24 }

    it { should eql(-24.0) }
  end

  context 'with a positive bignum' do
    let(:value) { 1311935550 }

    it { should eql(1311935550.0) }
  end

  context 'with a negative bignum' do
    let(:value) { -1311935550 }

    it { should eql(-1311935550.0) }
  end

  context 'with a zero decimal' do
    let(:value) { BigDecimal('0.0') }

    it { should eql(0.0) }
  end

  context 'with a positive decimal' do
    let(:value) { BigDecimal('24.35') }

    it { should eql(24.35) }
  end

  context 'with a negative decimal' do
    let(:value) { BigDecimal('-24.35') }

    it { should eql(-24.35) }
  end

  [ Object.new, true, '00.0', '0.', '-.0', 'string' ].each do |non_num_value|
    context 'does not coerce non-numeric value #{non_num_value.inspect}' do
      let(:value) { non_num_value }

      it { should equal(non_num_value) }
    end
  end
end