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require 'rspec/support'
require 'rspec/support/spec/library_wide_checks'
module RSpec
describe Support do
extend Support::RubyFeatures
#it_behaves_like "library wide checks", "rspec-support",
# :consider_a_test_env_file => %r{rspec/support/spec},
# :allowed_loaded_feature_regexps => [
# /rbconfig/, # Used by RubyFeatures
# /prettyprint.rb/, /pp.rb/, /diff\/lcs/ # These are all loaded by the differ.
# ]
describe '.method_handle_for(object, method_name)' do
untampered_class = Class.new do
def foo
:bar
end
end
http_request_class = Struct.new(:method, :uri)
proxy_class = Struct.new(:original) do
undef :=~, :method
def method_missing(name, *args, &block)
original.__send__(name, *args, &block)
end
end
it 'fetches method definitions for vanilla objects' do
object = untampered_class.new
expect(Support.method_handle_for(object, :foo).call).to eq :bar
end
it 'fetches method definitions for objects with method redefined' do
request = http_request_class.new(:get, "http://foo.com/")
expect(Support.method_handle_for(request, :uri).call).to eq "http://foo.com/"
end
it 'fetches method definitions for proxy objects' do
object = proxy_class.new([])
expect(Support.method_handle_for(object, :=~)).to be_a Method
end
it 'fetches method definitions for proxy objects' do
object = proxy_class.new([])
expect(Support.method_handle_for(object, :=~)).to be_a Method
end
it 'fails with `NameError` when an undefined method is fetched ' +
'from an object that has overriden `method` to raise an Exception' do
object = double
allow(object).to receive(:method).and_raise(Exception)
expect {
Support.method_handle_for(object, :some_undefined_method)
}.to raise_error(NameError)
end
it 'fails with `NameError` when a method is fetched from an object ' +
'that has overriden `method` to not return a method' do
object = proxy_class.new(double(:method => :baz))
expect {
Support.method_handle_for(object, :=~)
}.to raise_error(NameError)
end
context "for a BasicObject subclass", :if => RUBY_VERSION.to_f > 1.8 do
let(:basic_class) do
Class.new(BasicObject) do
def foo
:bar
end
end
end
let(:basic_class_with_method_override) do
Class.new(basic_class) do
def method
:method
end
end
end
let(:basic_class_with_kernel) do
Class.new(basic_class) do
include ::Kernel
end
end
let(:basic_class_with_proxying) do
Class.new(BasicObject) do
def method_missing(name, *args, &block)
"foo".__send__(name, *args, &block)
end
end
end
it 'still works', :if => supports_rebinding_module_methods? do
object = basic_class.new
expect(Support.method_handle_for(object, :foo).call).to eq :bar
end
it 'works when `method` has been overriden', :if => supports_rebinding_module_methods? do
object = basic_class_with_method_override.new
expect(Support.method_handle_for(object, :foo).call).to eq :bar
end
it 'allows `method` to be proxied', :unless => supports_rebinding_module_methods? do
object = basic_class_with_proxying.new
expect(Support.method_handle_for(object, :reverse).call).to eq "oof"
end
it 'still works when Kernel has been mixed in' do
object = basic_class_with_kernel.new
expect(Support.method_handle_for(object, :foo).call).to eq :bar
end
end
end
describe "failure notification" do
before { @failure_notifier = RSpec::Support.failure_notifier }
after { RSpec::Support.failure_notifier = @failure_notifier }
let(:error) { NotImplementedError.new("some message") }
let(:failures) { [] }
let(:append_to_failures_array_notifier) { lambda { |failure, _opts| failures << failure } }
def notify(failure)
RSpec::Support.notify_failure(failure)
end
def append_to_failures_array_instead_of_raising
avoid_raising_errors.and change { failures }.from([]).to([error])
end
def raise_instead_of_appending_to_failures_array
raise_error(error).and avoid_changing { failures }
end
it "defaults to raising the provided exception" do
expect { notify(error) }.to raise_error(error)
end
it "can be set to another callable" do
RSpec::Support.failure_notifier = append_to_failures_array_notifier
expect {
notify(error)
}.to append_to_failures_array_instead_of_raising
end
it "isolates notifier changes to the current thread" do
RSpec::Support.failure_notifier = append_to_failures_array_notifier
Thread.new do
expect { notify(error) }.to raise_instead_of_appending_to_failures_array
end.join
end
it "can be changed for the duration of a block" do
yielded = false
RSpec::Support.with_failure_notifier(append_to_failures_array_notifier) do
yielded = true
expect {
notify(error)
}.to append_to_failures_array_instead_of_raising
end
expect(yielded).to be true
end
it "resets the notifier back to what it originally was when the block completes, even if an error was raised" do
expect {
RSpec::Support.with_failure_notifier(append_to_failures_array_notifier) do
raise "boom"
end
}.to raise_error("boom")
expect { notify(error) }.to raise_instead_of_appending_to_failures_array
end
end
describe "warning notification" do
include RSpec::Support::Warnings
before { @warning_notifier = RSpec::Support.warning_notifier }
after { RSpec::Support.warning_notifier = @warning_notifier }
let(:warnings) { [] }
let(:append_to_warnings_array_notifier) { lambda { |warning| warnings << warning } }
def append_to_array_instead_of_warning
change { warnings }.from([]).to([a_string_including('some warning')])
end
it "defaults to warning with the provided text" do
expect {
warning('some warning')
}.to output(a_string_including 'some warning').to_stderr
end
it "can be set to another callable" do
RSpec::Support.warning_notifier = append_to_warnings_array_notifier
expect {
warning('some warning')
}.to append_to_array_instead_of_warning
end
end
describe Support::AllExceptionsExceptOnesWeMustNotRescue do
it "rescues a StandardError" do
expect {
begin
raise StandardError
rescue subject
end
}.not_to raise_error
end
it 'rescues an Exception' do
expect {
begin
raise Exception
rescue subject
end
}.not_to raise_error
end
Support::AllExceptionsExceptOnesWeMustNotRescue::AVOID_RESCUING.each do |klass|
exception = if klass == SignalException
SignalException.new("INT")
else
klass
end
it "does not rescue a #{klass}" do
expect {
begin
raise exception
rescue subject
end
}.to raise_error(klass)
end
end
end
end
end
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