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module RSpec
module Mocks
RSpec.describe "stub implementation" do
describe "with no args" do
it "execs the block when called" do
obj = double
allow(obj).to receive(:foo) { :bar }
expect(obj.foo).to eq :bar
end
end
describe "with one arg" do
it "execs the block with that arg when called" do
obj = double
allow(obj).to receive(:foo) { |given| given }
expect(obj.foo(:bar)).to eq :bar
end
end
describe "with variable args" do
it "execs the block when called" do
obj = double
allow(obj).to receive(:foo) { |*given| given.first }
expect(obj.foo(:bar)).to eq :bar
end
end
end
RSpec.describe "unstubbing with `and_call_original`" do
it "replaces the stubbed method with the original method" do
obj = Object.new
def obj.foo; :original; end
allow(obj).to receive(:foo)
allow(obj).to receive(:foo).and_call_original
expect(obj.foo).to eq :original
end
it "removes all stubs with the supplied method name" do
obj = Object.new
def obj.foo; :original; end
allow(obj).to receive(:foo).with(1)
allow(obj).to receive(:foo).with(2)
allow(obj).to receive(:foo).and_call_original
expect(obj.foo).to eq :original
end
it "does not remove any expectations with the same method name" do
obj = Object.new
def obj.foo; :original; end
expect(obj).to receive(:foo).with(3).and_return(:three)
allow(obj).to receive(:foo).with(1)
allow(obj).to receive(:foo).with(2)
allow(obj).to receive(:foo).and_call_original
expect(obj.foo(3)).to eq :three
end
shared_examples_for "stubbing `new` on class objects" do
it "restores the correct implementations when stubbed and unstubbed on a parent and child class" do
parent = stub_const("Parent", Class.new)
child = stub_const("Child", Class.new(parent))
allow(parent).to receive(:new)
allow(child).to receive(:new)
allow(parent).to receive(:new).and_call_original
allow(child).to receive(:new).and_call_original
expect(parent.new).to be_an_instance_of parent
expect(child.new).to be_an_instance_of child
end
it "restores the correct implementations when stubbed and unstubbed on a grandparent and grandchild class" do
grandparent = stub_const("GrandParent", Class.new)
parent = stub_const("Parent", Class.new(grandparent))
child = stub_const("Child", Class.new(parent))
allow(grandparent).to receive(:new)
allow(child).to receive(:new)
allow(grandparent).to receive(:new).and_call_original
allow(child).to receive(:new).and_call_original
expect(grandparent.new).to be_an_instance_of grandparent
expect(child.new).to be_an_instance_of child
end
end
context "when partial doubles are not verified" do
before { expect(RSpec::Mocks.configuration.verify_partial_doubles?).to be false }
include_examples "stubbing `new` on class objects"
end
context "when partial doubles are verified" do
include_context "with isolated configuration"
before { RSpec::Mocks.configuration.verify_partial_doubles = true }
include_examples "stubbing `new` on class objects"
if RSpec::Support::RubyFeatures.required_kw_args_supported?
binding.eval(<<-RUBY, __FILE__, __LINE__)
it "handles keyword arguments correctly" do
klass = Class.new do
def initialize(kw:)
end
end
allow(klass).to receive(:new).and_call_original
klass.new(kw: 42)
end
RUBY
end
end
end
end
end
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