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require 'helper'
class TestHashVisitor < MINITEST_TEST_CLASS
describe 'hash visitor' do
def visitor_result
visitor = Visitors::ToHash.new(@context)
visitor.reset_for @resource
visitor.visit @nodes
visitor.result
end
before do
@context = Context.new
@resource = User.new(1, 'Marty')
@nodes = []
end
it 'renders empty nodes list' do
assert_equal({}, visitor_result)
end
it 'renders attributes node' do
@nodes << RablRails::Nodes::Attribute.new(id: :id)
assert_equal({ id: 1 }, visitor_result)
end
it 'renders array of nodes' do
@nodes = [
RablRails::Nodes::Attribute.new(id: :id),
RablRails::Nodes::Attribute.new(name: :name)
]
assert_equal({ id: 1, name: 'Marty' }, visitor_result)
end
describe 'with a child node' do
Address = Struct.new(:city)
before do
@template = RablRails::CompiledTemplate.new
@template.add_node(RablRails::Nodes::Attribute.new(city: :city))
@nodes << RablRails::Nodes::Child.new(:address, @template)
@address = Address.new('Paris')
end
it 'renders with resource association as data source' do
@template.data = :address
def @resource.address; end
@resource.stub :address, @address do
assert_equal({ address: { city: 'Paris' } }, visitor_result)
end
end
it 'renders with arbitrary data source' do
@template.data = :@address
@context.assigns['address'] = @address
assert_equal({ address: { city: 'Paris' } }, visitor_result)
end
it 'renders with local method as data source' do
@template.data = :address
def @context.address; end
@context.stub :address, @address do
assert_equal({ address: { city: 'Paris' } }, visitor_result)
end
end
it 'renders with a collection as data source' do
@template.data = :address
def @context.address; end
@context.stub :address, [@address, @address] do
assert_equal({ address: [
{ city: 'Paris' },
{ city: 'Paris' }
]}, visitor_result)
end
end
it 'renders if the source is nil' do
@template.data = :address
def @resource.address; end
@resource.stub :address, nil do
assert_equal({ address: nil }, visitor_result)
end
end
end
it 'renders glue nodes' do
template = RablRails::CompiledTemplate.new
template.add_node(RablRails::Nodes::Attribute.new(name: :name))
template.data = :@user
@nodes << RablRails::Nodes::Glue.new(template)
@context.assigns['user'] = @resource
assert_equal({ name: 'Marty'}, visitor_result)
end
describe 'with a code node' do
before do
@proc = ->(object) { object.name }
end
it 'renders the evaluated proc' do
@nodes << RablRails::Nodes::Code.new(:name, @proc)
assert_equal({ name: 'Marty'}, visitor_result)
end
it 'renders with a true condition' do
@nodes << RablRails::Nodes::Code.new(:name, @proc, ->(o) { true })
assert_equal({ name: 'Marty'}, visitor_result)
end
it 'renders nothing with a false condition' do
@nodes << RablRails::Nodes::Code.new(:name, @proc, ->(o) { false })
assert_equal({}, visitor_result)
end
it 'renders method called from context' do
@proc = ->(object) { context_method }
def @context.context_method; end
@nodes = [RablRails::Nodes::Code.new(:name, @proc)]
@context.stub :context_method, 'Biff' do
assert_equal({ name: 'Biff'}, visitor_result)
end
end
end
describe 'with a condition node' do
before do
@ns = [RablRails::Nodes::Attribute.new(name: :name)]
end
it 'renders transparently if the condition is met' do
@nodes << RablRails::Nodes::Condition.new(->(o) { true }, @ns)
assert_equal({ name: 'Marty' }, visitor_result)
end
it 'renders nothing if the condition is not met' do
@nodes << RablRails::Nodes::Condition.new(->(o) { false }, @ns)
assert_equal({}, visitor_result)
end
end
it 'renders a merge node' do
proc = ->(c) { { custom: c.name } }
@nodes << RablRails::Nodes::Code.new(nil, proc)
assert_equal({ custom: 'Marty' }, visitor_result)
end
it 'raises an exception when trying to merge a non hash object' do
proc = ->(c) { c.name }
@nodes << RablRails::Nodes::Code.new(nil, proc)
assert_raises(RablRails::Renderer::PartialError) { visitor_result }
end
it 'renders partial defined in code node' do
template = RablRails::CompiledTemplate.new
template.add_node(RablRails::Nodes::Attribute.new(name: :name))
proc = ->(u) { partial('users/base', object: u) }
library = MiniTest::Mock.new
library.expect :compile_template_from_path, template, ['users/base', @context]
@nodes << RablRails::Nodes::Code.new(:user, proc)
RablRails::Library.stub :instance, library do
assert_equal({ user: { name: 'Marty' } }, visitor_result)
end
library.verify
end
it 'renders partial with empty target' do
proc = ->(u) { partial('users/base', object: []) }
@nodes << RablRails::Nodes::Code.new(:users, proc)
assert_equal({ users: [] }, visitor_result)
end
it 'raises an exception when calling a partial without a target' do
proc = ->(u) { partial('users/base') }
@nodes << RablRails::Nodes::Code.new(:user, proc)
assert_raises(RablRails::Renderer::PartialError) { visitor_result }
end
describe 'when hash options are set' do
before do
RablRails.reset_configuration
@nodes << RablRails::Nodes::Attribute.new(name: :name)
end
after { RablRails.reset_configuration }
it 'replaces nil values by strings' do
RablRails.configuration.replace_nil_values_with_empty_strings = true
@resource = User.new(1, nil)
assert_equal({ name: '' }, visitor_result)
end
it 'replaces empty string by nil' do
RablRails.configuration.replace_empty_string_values_with_nil = true
@resource = User.new(1, '')
assert_equal({ name: nil }, visitor_result)
end
it 'excludes nil values' do
RablRails.configuration.exclude_nil_values = true
@resource = User.new(1, nil)
@nodes << RablRails::Nodes::Attribute.new(id: :id)
assert_equal({ id: 1 }, visitor_result)
end
it 'excludes nil values and empty strings' do
RablRails.configuration.replace_empty_string_values_with_nil = true
RablRails.configuration.exclude_nil_values = true
@resource = User.new(nil, '')
@nodes << RablRails::Nodes::Attribute.new(id: :id)
assert_equal({}, visitor_result)
end
end
end
end
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