99 lines
2.9 KiB
Ruby
99 lines
2.9 KiB
Ruby
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require 'rails_helper'
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RSpec.describe UnitConversion::ParsedUnit do
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it 'converts simple units' do
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data = {
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'c' => '[cup_us]',
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'cups' => '[cup_us]',
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'pints' => '[pt_us]',
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'gram' => 'g',
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'grams' => 'g',
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'Grams' => 'g',
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'Tbsp' => '[tbs_us]',
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'[tbs_us]' => '[tbs_us]',
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'[oz_av]' => '[oz_av]'
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}
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data.each do |input, output|
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expect(UnitConversion::ParsedUnit.new(input).unit).to eq output
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end
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end
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it 'converts mixed units' do
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data = {
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'oz/c' => '[oz_av]/[cup_us]',
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'kilograms/cups' => 'kg/[cup_us]',
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'pints/junk' => '[pt_us]/junk',
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'gram/[tbs_us]' => 'g/[tbs_us]'
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}
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data.each do |input, output|
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expect(UnitConversion::ParsedUnit.new(input).unit).to eq output
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end
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end
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describe '.to_s' do
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it 'renders friendly simple units' do
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expect(UnitConversion::ParsedUnit.new('m').to_s).to eq 'meter'
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expect(UnitConversion::ParsedUnit.new('tbsp').to_s).to eq 'tablespoon'
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expect(UnitConversion::ParsedUnit.new('gallons').to_s).to eq 'gallon'
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expect(UnitConversion::ParsedUnit.new('[cup_us]').to_s).to eq 'cup'
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expect(UnitConversion::ParsedUnit.new('junk').to_s).to eq 'junk'
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end
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it 'renders friendly compound units' do
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expect(UnitConversion::ParsedUnit.new('m/c').to_s).to eq 'meter/cup'
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expect(UnitConversion::ParsedUnit.new('[oz_av]/[cup_us]').to_s).to eq 'ounce/cup'
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end
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end
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describe '.metric?' do
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it 'returns true for metric units' do
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expect(UnitConversion::ParsedUnit.new('m').metric?).to be_truthy
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expect(UnitConversion::ParsedUnit.new('g').metric?).to be_truthy
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expect(UnitConversion::ParsedUnit.new('meter').metric?).to be_truthy
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expect(UnitConversion::ParsedUnit.new('centiliter').metric?).to be_truthy
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end
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it 'returns false for standard units' do
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expect(UnitConversion::ParsedUnit.new('c').metric?).to be_falsey
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expect(UnitConversion::ParsedUnit.new('tbsp').metric?).to be_falsey
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expect(UnitConversion::ParsedUnit.new('oz').metric?).to be_falsey
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end
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it 'returns false for unknown units' do
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expect(UnitConversion::ParsedUnit.new('cats').metric?).to be_falsey
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expect(UnitConversion::ParsedUnit.new('dogs').metric?).to be_falsey
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end
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end
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describe '.density?' do
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it 'returns true for any mass over volume unit' do
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data = [
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'gram/cup',
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'pound/gallon',
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'ounce/tablespoon',
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'ounce/centimeter3'
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]
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data.each do |input|
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expect(UnitConversion::ParsedUnit.new(input).density?).to be_truthy
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end
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end
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it 'returns false for any non density unit' do
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data = [
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'cup',
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'gram',
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'gram/hour',
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'centimeter3/ounce'
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]
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data.each do |input|
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expect(UnitConversion::ParsedUnit.new(input).density?).to be_falsey
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end
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end
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end
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end
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