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require 'spec_helper'
describe Dependor::Instantiator do
let(:injector) { double(:injector) }
let(:dependency_names) { Dependor::DependencyNamesCache.new }
let(:instantiator) { Dependor::Instantiator.new(injector, dependency_names) }
it "instantiates objects with no-arg constructors" do
klass = Class.new do
def foo
"foo"
end
end
instance = instantiator.instantiate(klass)
instance.foo.should == "foo"
end
it "instantiates objects with constructors" do
klass = Class.new do
def initialize(foo, bar, baz)
@foo = [foo, bar, baz].join('-')
end
def foo
@foo
end
end
injector.should_receive(:get).with(:foo).and_return("foo")
injector.should_receive(:get).with(:bar).and_return("bar")
injector.should_receive(:get).with(:baz).and_return("baz")
instance = instantiator.instantiate(klass)
instance.foo.should == 'foo-bar-baz'
end
end
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