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Contents
require 'rom/array_dataset'
RSpec.describe ROM::ArrayDataset do
let(:klass) do
Class.new do
include ROM::ArrayDataset
def self.row_proc
-> i { i.each_with_object({}) { |(k,v),h| h[k.to_sym] = v } }
end
end
end
it_behaves_like 'an enumerable dataset' do
describe '#flatten' do
let(:data) { [[{ 'name' => 'Jane' }], [{ 'name' => 'Joe' }]] }
it 'returns a new dataset with flattened data' do
result = dataset.flatten
expect(result).to match_array([{ name: 'Jane' }, { name: 'Joe' }])
end
end
describe '#map!' do
context 'with a block' do
it 'returns a new dataset with mapped data' do
dataset.map! do |row|
row.merge(age: 21)
end
expect(dataset).to match_array([
{ name: 'Jane', age: 21 }, { name: 'Joe', age: 21 }
])
end
end
context 'without a block' do
it 'returns an enumerator' do
result = dataset.map!
expect(result).to be_instance_of(Enumerator)
expect(result).to match_array([
{ name: 'Jane' }, { name: 'Joe' }
])
end
end
end
describe '#values_at' do
it 'returns a new dataset with rows at given indices' do
result = dataset.values_at(1)
expect(result).to match_array([{ name: 'Joe' }])
end
end
end
end
Version data entries
18 entries across 18 versions & 1 rubygems