require 'spec_helper'

describe 'dig44' do

  let(:data) do
    {
        'a' => {
            'g' => '2',
            'e' => [
                'f0',
                'f1',
                {
                    'x' => {
                        'y' => 'z'
                    }
                },
                'f3',
            ]
        },
        'b' => true,
        'c' => false,
        'd' => '1',
        'e' => :undef,
        'f' => nil,
    }
  end

  context 'single values' do
    it 'should exist' do
      is_expected.not_to be_nil
    end

    it 'should require two arguments' do
      is_expected.to run.with_params().and_raise_error(ArgumentError)
    end

    it 'should fail if the data is not a structure' do
      is_expected.to run.with_params('test', []).and_raise_error(Puppet::Error)
    end

    it 'should fail if the path is not an array' do
      is_expected.to run.with_params({}, '').and_raise_error(Puppet::Error)
    end

    it 'should return the value if the value is string' do
      is_expected.to run.with_params(data, ['d'], 'default').and_return('1')
    end

    it 'should return true if the value is true' do
      is_expected.to run.with_params(data, ['b'], 'default').and_return(true)
    end

    it 'should return false if the value is false' do
      is_expected.to run.with_params(data, ['c'], 'default').and_return(false)
    end

    it 'should return the default if the value is nil' do
      is_expected.to run.with_params(data, ['f'], 'default').and_return('default')
    end

    it 'should return the default if the value is :undef (same as nil)' do
      is_expected.to run.with_params(data, ['e'], 'default').and_return('default')
    end

    it 'should return the default if the path is not found' do
      is_expected.to run.with_params(data, ['missing'], 'default').and_return('default')
    end
  end

  context 'structure values' do

    it 'should be able to extract a deeply nested hash value' do
      is_expected.to run.with_params(data, %w(a g), 'default').and_return('2')
    end

    it 'should return the default value if the path is too long' do
      is_expected.to run.with_params(data, %w(a g c d), 'default').and_return('default')
    end

    it 'should support an array index (number) in the path' do
      is_expected.to run.with_params(data, ['a', 'e', 1], 'default').and_return('f1')
    end

    it 'should support an array index (string) in the path' do
      is_expected.to run.with_params(data, %w(a e 1), 'default').and_return('f1')
    end

    it 'should return the default value if an array index is not a number' do
      is_expected.to run.with_params(data, %w(a b c), 'default').and_return('default')
    end

    it 'should return the default value if and index is out of array length' do
      is_expected.to run.with_params(data, %w(a e 5), 'default').and_return('default')
    end

    it 'should be able to path though both arrays and hashes' do
      is_expected.to run.with_params(data, %w(a e 2 x y), 'default').and_return('z')
    end

    it 'should return "nil" if value is not found and no default value is provided' do
      is_expected.to run.with_params(data, %w(a 1)).and_return(nil)
    end

  end
end