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require 'spec_helper'
require 'dependor/shorty'
describe Dependor::AutoInject do
class SampleClassWithNoDependencies
end
class SampleClassWithDependency
takes :sample_class_with_no_dependencies
end
class SampleClassWithManualDependency
takes :manual_dep
end
class DependsOnFactoryMethod
takes :create_foo
end
module SomeModule
class SampleClassWithinSomeModule
end
end
class SomeFactory
attr_reader :foo, :sample_class_with_no_dependencies
def initialize(foo, sample_class_with_no_dependencies)
@foo = foo
@sample_class_with_no_dependencies = sample_class_with_no_dependencies
end
end
class SampleInjector
include Dependor::AutoInject
look_in_modules SomeModule
def manual_dep
"manual dep"
end
def create_foo(foo_name)
inject(SomeFactory, foo: foo_name)
end
end
let(:injector) { SampleInjector.new }
shared_examples_for 'dependency injector' do
it 'responds to the object name' do
injector.should respond_to(object_name)
end
it 'creates the object' do
injector.send(object_name).should be_an_instance_of(object_class)
end
end
context 'no dependencies' do
let(:object_name) { :sample_class_with_no_dependencies }
let(:object_class) { SampleClassWithNoDependencies }
it_behaves_like 'dependency injector'
end
context 'dependencies on other objects' do
let(:object_name) { :sample_class_with_dependency }
let(:object_class) { SampleClassWithDependency }
it_behaves_like 'dependency injector'
end
context 'dependencies on objects returned by methods on the injector' do
let(:object_name) { :sample_class_with_manual_dependency }
let(:object_class) { SampleClassWithManualDependency }
it_behaves_like 'dependency injector'
end
context 'dependencies from another module' do
let(:object_name) { :sample_class_within_some_module }
let(:object_class) { SomeModule::SampleClassWithinSomeModule }
it_behaves_like 'dependency injector'
end
context 'autoinjecting with custom dependencies' do
it "injects the dependencies which are not explicitly specified" do
injector.create_foo("the foo name").sample_class_with_no_dependencies.should be_an_instance_of(SampleClassWithNoDependencies)
end
it "passes through the dependencies that were specified" do
injector.create_foo("the foo name").foo.should == "the foo name"
end
end
context 'injecting factory methods' do
it "injects factory methods as procs" do
object = injector.depends_on_factory_method
object.create_foo.call("test").foo.should == "test"
end
end
it "raises an error if the object is not found" do
proc{ injector.unknown_object }.should raise_exception(Dependor::UnknownObject)
end
it 'responds to regular methods on injector' do
injector.should respond_to(:manual_dep)
end
end
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