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require 'spec_helper'
require 'json'
describe Mongo::DBRef do
let(:object_id) do
BSON::ObjectId.new
end
describe '#as_json' do
context 'when the database is not provided' do
let(:dbref) do
described_class.new('users', object_id)
end
it 'returns the json document without database' do
expect(dbref.as_json).to eq({ '$ref' => 'users', '$id' => object_id })
end
end
context 'when the database is provided' do
let(:dbref) do
described_class.new('users', object_id, 'database')
end
it 'returns the json document with database' do
expect(dbref.as_json).to eq({
'$ref' => 'users',
'$id' => object_id,
'$db' => 'database'
})
end
end
end
describe '#initialize' do
let(:dbref) do
described_class.new('users', object_id)
end
it 'sets the collection' do
expect(dbref.collection).to eq('users')
end
it 'sets the id' do
expect(dbref.id).to eq(object_id)
end
context 'when a database is provided' do
let(:dbref) do
described_class.new('users', object_id, 'db')
end
it 'sets the database' do
expect(dbref.database).to eq('db')
end
end
end
describe '#to_bson' do
let(:dbref) do
described_class.new('users', object_id, 'database')
end
it 'converts the underlying document to bson' do
expect(dbref.to_bson.to_s).to eq(dbref.as_json.to_bson.to_s)
end
end
describe '#to_json' do
context 'when the database is not provided' do
let(:dbref) do
described_class.new('users', object_id)
end
it 'returns the json document without database' do
expect(dbref.to_json).to eq("{\"$ref\":\"users\",\"$id\":#{object_id.to_json}}")
end
end
context 'when the database is provided' do
let(:dbref) do
described_class.new('users', object_id, 'database')
end
it 'returns the json document with database' do
expect(dbref.to_json).to eq("{\"$ref\":\"users\",\"$id\":#{object_id.to_json},\"$db\":\"database\"}")
end
end
end
describe '#from_bson' do
let(:buffer) do
dbref.to_bson
end
let(:decoded) do
BSON::Document.from_bson(BSON::ByteBuffer.new(buffer.to_s))
end
context 'when a database exists' do
let(:dbref) do
described_class.new('users', object_id, 'database')
end
it 'decodes the ref' do
expect(decoded.collection).to eq('users')
end
it 'decodes the id' do
expect(decoded.id).to eq(object_id)
end
it 'decodes the database' do
expect(decoded.database).to eq('database')
end
end
context 'when no database exists' do
let(:dbref) do
described_class.new('users', object_id)
end
it 'decodes the ref' do
expect(decoded.collection).to eq('users')
end
it 'decodes the id' do
expect(decoded.id).to eq(object_id)
end
it 'sets the database to nil' do
expect(decoded.database).to be_nil
end
end
end
end
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