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require 'spec_helper'
describe Bogus::CopiesClasses do
module SampleMethods
def foo
end
def bar(x)
end
def baz(x, *y)
end
def bam(opts = {})
end
def baa(x, &block)
end
end
shared_examples_for 'the copied class' do
it "copies methods with no arguments" do
expect(subject).to respond_to(:foo)
subject.foo
end
it "copies methods with explicit arguments" do
expect(subject).to respond_to(:bar)
expect(subject.method(:bar).arity).to eq 1
subject.bar('hello')
end
it "copies methods with variable arguments" do
expect(subject).to respond_to(:baz)
subject.baz('hello', 'foo', 'bar', 'baz')
end
it "copies methods with default arguments" do
expect(subject).to respond_to(:bam)
subject.bam
subject.bam(hello: 'world')
end
it "copies methods with block arguments" do
expect(subject).to respond_to(:baa)
subject.baa('hello')
subject.baa('hello') {}
end
end
let(:copies_classes) { Bogus.inject.copies_classes }
let(:fake_class) { copies_classes.copy(klass) }
let(:fake) { fake_class.new }
class FooWithInstanceMethods
CONST = "the const"
include SampleMethods
end
context "nested constants" do
let(:klass) { FooWithInstanceMethods }
it "does not overwrite nested constants" do
expect(fake_class::CONST).to eq "the const"
end
end
context "instance methods" do
let(:klass) { FooWithInstanceMethods }
subject{ fake }
it_behaves_like 'the copied class'
end
context "constructors" do
let(:klass) {
Class.new do
def initialize(hello)
end
def foo
end
end
}
it "adds a no-arg constructor" do
instance = fake_class.__create__
expect(instance).to respond_to(:foo)
end
it "adds a constructor that allows passing the correct number of arguments" do
instance = fake_class.new('hello')
expect(instance).to respond_to(:foo)
end
end
class ClassWithClassMethods
extend SampleMethods
end
context "class methods" do
let(:klass) { ClassWithClassMethods }
subject{ fake_class }
it_behaves_like 'the copied class'
end
context "identification" do
module SomeModule
class SomeClass
end
end
let(:klass) { SomeModule::SomeClass }
it "should copy the class name" do
expect(fake.class.name).to eq 'SomeModule::SomeClass'
end
it "should override kind_of?" do
expect(fake.kind_of?(SomeModule::SomeClass)).to be_true
end
it "should override instance_of?" do
expect(fake.instance_of?(SomeModule::SomeClass)).to be_true
end
it "should override is_a?" do
expect(fake.is_a?(SomeModule::SomeClass)).to be_true
end
it "should include class name in the output of fake's class #to_s" do
expect(fake.class.to_s).to include(klass.name)
end
it "should include class name in the output of fake's #to_s" do
expect(fake.to_s).to include(klass.name)
end
it 'should override ===' do
expect(SomeModule::SomeClass === fake).to be_true
end
end
shared_examples_for 'spying' do
def should_record(method, *args)
mock(subject).__record__(method, *args)
subject.send(method, *args)
end
it "records method calls with no arguments" do
should_record(:foo)
end
it "records method calls with explicit arguments" do
should_record(:bar, 'hello')
end
it "records method calls with variable arguments" do
should_record(:baz, 'hello', 'foo', 'bar', 'baz')
end
it "records method calls with default arguments" do
should_record(:bam, hello: 'world')
end
end
context "spying on an instance" do
let(:klass) { FooWithInstanceMethods }
subject{ fake }
include_examples 'spying'
end
context "spying on copied class" do
let(:klass) { ClassWithClassMethods }
subject { fake_class }
include_examples 'spying'
end
class SomeModel
def save(*)
# ignores arguments
end
end
context "copying classes with methods with nameless parameters" do
let(:klass) { SomeModel }
it "copies those methods" do
expect(fake).to respond_to(:save)
end
end
end
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