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require 'spec_helper'
module Spy
describe Subroutine do
class Bar
def foo(given = nil)
end
end
let(:obj) { Bar.new }
describe "stub implementation" do
describe "with no args" do
it "execs the block when called" do
Subroutine.new(obj, :foo).hook.and_return { :bar }
expect(obj.foo).to eq :bar
end
end
describe "with one arg" do
it "execs the block with that arg when called" do
Subroutine.new(obj, :foo).hook.and_return {|given| given}
expect(obj.foo(:bar)).to eq :bar
end
end
describe "with variable args" do
it "execs the block when called" do
Subroutine.new(obj, :foo).hook.and_return {|*given| given.first}
expect(obj.foo(:bar)).to eq :bar
end
end
end
describe "unstub implementation" do
it "replaces the stubbed method with the original method" do
obj = Object.new
def obj.foo; :original; end
Subroutine.new(obj, :foo).hook.unhook
expect(obj.foo).to eq :original
end
it "restores the correct implementations when stubbed and unstubbed on a parent and child class" do
parent = Class.new
child = Class.new(parent)
Spy.on(parent, :new)
Spy.on(child, :new)
Spy.off(parent, :new)
Spy.off(child, :new)
expect(parent.new).to be_an_instance_of parent
expect(child.new).to be_an_instance_of child
end
it "raises a MockExpectationError if the method has not been stubbed" do
obj = Object.new
expect {
Spy.off(obj, :foo)
}.to raise_error
end
end
end
end
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