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# frozen_string_literal: true
require 'spec_helper'
RSpec.describe StubMethodCalls do
include described_class
let(:object) do
Class.new do
def self.test_method
'test'
end
def self.test_method_two(response: nil)
response || 'test_two'
end
end
end
describe '#stub_method' do
let(:method_to_stub) { :test_method }
it 'stubs the method response' do
stub_method(object, method_to_stub) { true }
expect(object.send(method_to_stub)).to eq(true)
end
context 'when calling it on an already stubbed method' do
before do
stub_method(object, method_to_stub) { false }
end
it 'stubs correctly' do
stub_method(object, method_to_stub) { true }
expect(object.send(method_to_stub)).to eq(true)
end
end
context 'methods that accept arguments' do
it 'stubs correctly' do
stub_method(object, method_to_stub) { |a, b| a + b }
expect(object.send(method_to_stub, 1, 2)).to eq(3)
end
context 'methods that use named arguments' do
let(:method_to_stub) { :test_method_two }
it 'stubs correctly' do
stub_method(object, method_to_stub) { |a: 'test'| a }
expect(object.send(method_to_stub, a: 'testing')).to eq('testing')
expect(object.send(method_to_stub)).to eq('test')
end
context 'stubbing non-existent method' do
let(:method_to_stub) { :another_method }
it 'stubs correctly' do
stub_method(object, method_to_stub) { |a: 'test'| a }
expect(object.send(method_to_stub, a: 'testing')).to eq('testing')
expect(object.send(method_to_stub)).to eq('test')
end
end
end
end
end
describe '#restore_original_method' do
before do
stub_method(object, :test_method) { true }
end
it 'restores original behaviour' do
expect(object.test_method).to eq(true)
restore_original_method(object, :test_method)
expect(object.test_method).to eq('test')
end
context 'method is not stubbed' do
specify do
expect do
restore_original_method(object, 'some_other_method')
end.to raise_error(NotImplementedError, "some_other_method has not been stubbed on #{object}")
end
end
end
describe '#restore_original_methods' do
before do
stub_method(object, :test_method) { true }
stub_method(object, :test_method_two) { true }
end
it 'restores original behaviour' do
restore_original_methods(object)
expect(object.test_method).to eq('test')
expect(object.test_method_two).to eq('test_two')
end
end
end
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