key_transform_test.rb

require 'test_helper'

module ActiveModelSerializers
  class KeyTransformTest < ActiveSupport::TestCase
    def test_camel
      obj = Object.new
      scenarios = [
        {
          value: { :"some-key" => 'value' },
          expected: { SomeKey: 'value' }
        },
        {
          value: { someKey: 'value' },
          expected: { SomeKey: 'value' }
        },
        {
          value: { some_key: 'value' },
          expected: { SomeKey: 'value' }
        },
        {
          value: { 'some-key' => 'value' },
          expected: { 'SomeKey' => 'value' }
        },
        {
          value: { 'someKey' => 'value' },
          expected: { 'SomeKey' => 'value' }
        },
        {
          value: { 'some_key' => 'value' },
          expected: { 'SomeKey' => 'value' }
        },
        {
          value: :"some-value",
          expected: :SomeValue
        },
        {
          value: :some_value,
          expected: :SomeValue
        },
        {
          value: :someValue,
          expected: :SomeValue
        },
        {
          value: 'some-value',
          expected: 'SomeValue'
        },
        {
          value: 'someValue',
          expected: 'SomeValue'
        },
        {
          value: 'some_value',
          expected: 'SomeValue'
        },
        {
          value: obj,
          expected: obj
        },
        {
          value: nil,
          expected: nil
        },
        {
          value: [
            { some_value: 'value' }
          ],
          expected: [
            { SomeValue: 'value' }
          ]
        },
        {
          value: 'scope/some_value',
          expected: 'Scope/SomeValue'
        }
      ]
      scenarios.each do |s|
        result = ActiveModelSerializers::KeyTransform.camel(s[:value])
        assert_equal s[:expected], result
      end
    end

    def test_camel_lower
      obj = Object.new
      scenarios = [
        {
          value: { :"some-key" => 'value' },
          expected: { someKey: 'value' }
        },
        {
          value: { SomeKey: 'value' },
          expected: { someKey: 'value' }
        },
        {
          value: { some_key: 'value' },
          expected: { someKey: 'value' }
        },
        {
          value: { 'some-key' => 'value' },
          expected: { 'someKey' => 'value' }
        },
        {
          value: { 'SomeKey' => 'value' },
          expected: { 'someKey' => 'value' }
        },
        {
          value: { 'some_key' => 'value' },
          expected: { 'someKey' => 'value' }
        },
        {
          value: :"some-value",
          expected: :someValue
        },
        {
          value: :SomeValue,
          expected: :someValue
        },
        {
          value: :some_value,
          expected: :someValue
        },
        {
          value: 'some-value',
          expected: 'someValue'
        },
        {
          value: 'SomeValue',
          expected: 'someValue'
        },
        {
          value: 'some_value',
          expected: 'someValue'
        },
        {
          value: obj,
          expected: obj
        },
        {
          value: nil,
          expected: nil
        },
        {
          value: [
            { some_value: 'value' }
          ],
          expected: [
            { someValue: 'value' }
          ]
        },
        {
          value: 'scope/some_value',
          expected: 'scope/someValue'
        }
      ]
      scenarios.each do |s|
        result = ActiveModelSerializers::KeyTransform.camel_lower(s[:value])
        assert_equal s[:expected], result
      end
    end

    def test_dash
      obj = Object.new
      scenarios = [
        {
          value: { some_key: 'value' },
          expected: { :"some-key" => 'value' }
        },
        {
          value: { 'some_key' => 'value' },
          expected: { 'some-key' => 'value' }
        },
        {
          value: { SomeKey: 'value' },
          expected: { :"some-key" => 'value' }
        },
        {
          value: { 'SomeKey' => 'value' },
          expected: { 'some-key' => 'value' }
        },
        {
          value: { someKey: 'value' },
          expected: { :"some-key" => 'value' }
        },
        {
          value: { 'someKey' => 'value' },
          expected: { 'some-key' => 'value' }
        },
        {
          value: :some_value,
          expected: :"some-value"
        },
        {
          value: :SomeValue,
          expected: :"some-value"
        },
        {
          value: 'SomeValue',
          expected: 'some-value'
        },
        {
          value: :someValue,
          expected: :"some-value"
        },
        {
          value: 'someValue',
          expected: 'some-value'
        },
        {
          value: obj,
          expected: obj
        },
        {
          value: nil,
          expected: nil
        },
        {
          value: [
            { 'some_value' => 'value' }
          ],
          expected: [
            { 'some-value' => 'value' }
          ]
        }
      ]
      scenarios.each do |s|
        result = ActiveModelSerializers::KeyTransform.dash(s[:value])
        assert_equal s[:expected], result
      end
    end

    def test_underscore
      obj = Object.new
      scenarios = [
        {
          value: { :"some-key" => 'value' },
          expected: { some_key: 'value' }
        },
        {
          value: { 'some-key' => 'value' },
          expected: { 'some_key' => 'value' }
        },
        {
          value: { SomeKey: 'value' },
          expected: { some_key: 'value' }
        },
        {
          value: { 'SomeKey' => 'value' },
          expected: { 'some_key' => 'value' }
        },
        {
          value: { someKey: 'value' },
          expected: { some_key: 'value' }
        },
        {
          value: { 'someKey' => 'value' },
          expected: { 'some_key' => 'value' }
        },
        {
          value: :"some-value",
          expected: :some_value
        },
        {
          value: :SomeValue,
          expected: :some_value
        },
        {
          value: :someValue,
          expected: :some_value
        },
        {
          value: 'some-value',
          expected: 'some_value'
        },
        {
          value: 'SomeValue',
          expected: 'some_value'
        },
        {
          value: 'someValue',
          expected: 'some_value'
        },
        {
          value: obj,
          expected: obj
        },
        {
          value: nil,
          expected: nil
        },
        {
          value: [
            { 'some-value' => 'value' }
          ],
          expected: [
            { 'some_value' => 'value' }
          ]
        }
      ]
      scenarios.each do |s|
        result = ActiveModelSerializers::KeyTransform.underscore(s[:value])
        assert_equal s[:expected], result
      end
    end
  end
end