823a352f0f
* Extracts a value from a deeply-nested data structure * Returns default if a value could not be extracted
100 lines
3.2 KiB
Ruby
100 lines
3.2 KiB
Ruby
require 'spec_helper'
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describe 'try_get_value' do
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let(:data) do
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{
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'a' => {
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'g' => '2',
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'e' => [
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'f0',
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'f1',
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{
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'x' => {
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'y' => 'z'
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}
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},
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'f3',
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]
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},
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'b' => true,
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'c' => false,
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'd' => '1',
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}
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end
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context 'single values' do
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it 'should exist' do
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is_expected.not_to eq(nil)
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end
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it 'should be able to return a single value' do
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is_expected.to run.with_params('test').and_return('test')
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end
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it 'should use the default value if data is a single value and path is present' do
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is_expected.to run.with_params('test', 'path', 'default').and_return('default')
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end
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it 'should return default if there is no data' do
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is_expected.to run.with_params(nil, nil, 'default').and_return('default')
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end
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it 'should be able to use data structures as default values' do
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is_expected.to run.with_params('test', 'path', data).and_return(data)
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end
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end
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context 'structure values' do
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it 'should be able to extracts a single hash value' do
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is_expected.to run.with_params(data, 'd', 'default').and_return('1')
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end
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it 'should be able to extract a deeply nested hash value' do
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is_expected.to run.with_params(data, 'a/g', 'default').and_return('2')
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end
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it 'should return the default value if the path is not found' do
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is_expected.to run.with_params(data, 'missing', 'default').and_return('default')
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end
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it 'should return the default value if the path is too long' do
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is_expected.to run.with_params(data, 'a/g/c/d', 'default').and_return('default')
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end
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it 'should support an array index in the path' do
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is_expected.to run.with_params(data, 'a/e/1', 'default').and_return('f1')
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end
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it 'should return the default value if an array index is not a number' do
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is_expected.to run.with_params(data, 'a/b/c', 'default').and_return('default')
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end
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it 'should return the default value if and index is out of array length' do
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is_expected.to run.with_params(data, 'a/e/5', 'default').and_return('default')
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end
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it 'should be able to path though both arrays and hashes' do
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is_expected.to run.with_params(data, 'a/e/2/x/y', 'default').and_return('z')
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end
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it 'should be able to return "true" value' do
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is_expected.to run.with_params(data, 'b', 'default').and_return(true)
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is_expected.to run.with_params(data, 'm', true).and_return(true)
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end
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it 'should be able to return "false" value' do
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is_expected.to run.with_params(data, 'c', 'default').and_return(false)
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is_expected.to run.with_params(data, 'm', false).and_return(false)
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end
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it 'should return "nil" if value is not found and no default value is provided' do
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is_expected.to run.with_params(data, 'a/1').and_return(nil)
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end
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it 'should be able to use a custom path separator' do
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is_expected.to run.with_params(data, 'a::g', 'default', '::').and_return('2')
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is_expected.to run.with_params(data, 'a::c', 'default', '::').and_return('default')
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end
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end
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end
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