/
any_instance_spec.rb
1023 lines (853 loc) · 39.8 KB
/
any_instance_spec.rb
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require 'spec_helper'
require 'delegate'
module RSpec
module Mocks
describe "#any_instance" do
class CustomErrorForAnyInstanceSpec < StandardError;end
let(:klass) do
Class.new do
def existing_method; :existing_method_return_value; end
def existing_method_with_arguments(arg_one, arg_two = nil); :existing_method_with_arguments_return_value; end
def another_existing_method; end
private
def private_method; :private_method_return_value; end
end
end
let(:existing_method_return_value){ :existing_method_return_value }
context "invocation order" do
context "#stub" do
it "raises an error if 'stub' follows 'with'" do
expect { klass.any_instance.with("1").stub(:foo) }.to raise_error(NoMethodError)
end
it "raises an error if 'with' follows 'and_return'" do
expect { klass.any_instance.stub(:foo).and_return(1).with("1") }.to raise_error(NoMethodError)
end
it "raises an error if 'with' follows 'and_raise'" do
expect { klass.any_instance.stub(:foo).and_raise(1).with("1") }.to raise_error(NoMethodError)
end
it "raises an error if 'with' follows 'and_yield'" do
expect { klass.any_instance.stub(:foo).and_yield(1).with("1") }.to raise_error(NoMethodError)
end
end
context "#stub_chain" do
it "raises an error if 'stub_chain' follows 'any_instance'" do
expect { klass.any_instance.and_return("1").stub_chain(:foo, :bar) }.to raise_error(NoMethodError)
end
end
context "#should_receive" do
it "raises an error if 'should_receive' follows 'with'" do
expect { klass.any_instance.with("1").should_receive(:foo) }.to raise_error(NoMethodError)
end
it "raises an error if 'with' follows 'and_return'" do
pending "see Github issue #42"
expect { klass.any_instance.should_receive(:foo).and_return(1).with("1") }.to raise_error(NoMethodError)
end
it "raises an error if 'with' follows 'and_raise'" do
pending "see Github issue #42"
expect { klass.any_instance.should_receive(:foo).and_raise(1).with("1") }.to raise_error(NoMethodError)
end
end
end
context "with #stub" do
it "does not suppress an exception when a method that doesn't exist is invoked" do
klass.any_instance.stub(:foo)
expect { klass.new.bar }.to raise_error(NoMethodError)
end
context 'multiple methods' do
it "allows multiple methods to be stubbed in a single invocation" do
klass.any_instance.stub(:foo => 'foo', :bar => 'bar')
instance = klass.new
expect(instance.foo).to eq('foo')
expect(instance.bar).to eq('bar')
end
it "adheres to the contract of multiple method stubbing withou any instance" do
expect(Object.new.stub(:foo => 'foo', :bar => 'bar')).to eq(:foo => 'foo', :bar => 'bar')
expect(klass.any_instance.stub(:foo => 'foo', :bar => 'bar')).to eq(:foo => 'foo', :bar => 'bar')
end
context "allows a chain of methods to be stubbed using #stub_chain" do
it "given symbols representing the methods" do
klass.any_instance.stub_chain(:one, :two, :three).and_return(:four)
expect(klass.new.one.two.three).to eq(:four)
end
it "given a hash as the last argument uses the value as the expected return value" do
klass.any_instance.stub_chain(:one, :two, :three => :four)
expect(klass.new.one.two.three).to eq(:four)
end
it "given a string of '.' separated method names representing the chain" do
klass.any_instance.stub_chain('one.two.three').and_return(:four)
expect(klass.new.one.two.three).to eq(:four)
end
end
end
context "behaves as 'every instance'" do
it "stubs every instance in the spec" do
klass.any_instance.stub(:foo).and_return(result = Object.new)
expect(klass.new.foo).to eq(result)
expect(klass.new.foo).to eq(result)
end
it "stubs instance created before any_instance was called" do
instance = klass.new
klass.any_instance.stub(:foo).and_return(result = Object.new)
expect(instance.foo).to eq(result)
end
it 'handles freeze and duplication correctly' do
String.any_instance.stub(:any_method)
foo = 'foo'.freeze
expect(foo.dup.concat 'bar').to eq 'foobar'
end
end
context "with argument matching" do
before do
klass.any_instance.stub(:foo).with(:param_one, :param_two).and_return(:result_one)
klass.any_instance.stub(:foo).with(:param_three, :param_four).and_return(:result_two)
end
it "returns the stubbed value when arguments match" do
instance = klass.new
expect(instance.foo(:param_one, :param_two)).to eq(:result_one)
expect(instance.foo(:param_three, :param_four)).to eq(:result_two)
end
it "fails the spec with an expectation error when the arguments do not match" do
expect do
klass.new.foo(:param_one, :param_three)
end.to(raise_error(RSpec::Mocks::MockExpectationError))
end
end
context "with multiple stubs" do
before do
klass.any_instance.stub(:foo).and_return(1)
klass.any_instance.stub(:bar).and_return(2)
end
it "stubs a method" do
instance = klass.new
expect(instance.foo).to eq(1)
expect(instance.bar).to eq(2)
end
it "returns the same value for calls on different instances" do
expect(klass.new.foo).to eq(klass.new.foo)
expect(klass.new.bar).to eq(klass.new.bar)
end
end
context "with #and_return" do
it "stubs a method that doesn't exist" do
klass.any_instance.stub(:foo).and_return(1)
expect(klass.new.foo).to eq(1)
end
it "stubs a method that exists" do
klass.any_instance.stub(:existing_method).and_return(1)
expect(klass.new.existing_method).to eq(1)
end
it "returns the same object for calls on different instances" do
return_value = Object.new
klass.any_instance.stub(:foo).and_return(return_value)
expect(klass.new.foo).to be(return_value)
expect(klass.new.foo).to be(return_value)
end
end
context "with #and_yield" do
it "yields the value specified" do
yielded_value = Object.new
klass.any_instance.stub(:foo).and_yield(yielded_value)
klass.new.foo{|value| expect(value).to be(yielded_value)}
end
end
context 'with #and_call_original and competing #with' do
let(:klass) { Struct.new(:a_method) }
it 'can combine and_call_original, with, and_return' do
allow_any_instance_of(klass).to receive(:a_method).and_call_original
allow_any_instance_of(klass).to receive(:a_method).with(:arg).and_return('value')
expect(klass.new('org').a_method).to eq 'org'
expect(klass.new.a_method(:arg)).to eq 'value'
end
it 'can combine and_call_original, with, and_return (old syntax)' do
klass.any_instance.stub(:a_method).and_call_original
klass.any_instance.stub(:a_method).with(:arg).and_return('value')
expect(klass.new('org').a_method).to eq 'org'
expect(klass.new.a_method(:arg)).to eq 'value'
end
end
context "with #and_raise" do
it "stubs a method that doesn't exist" do
klass.any_instance.stub(:foo).and_raise(CustomErrorForAnyInstanceSpec)
expect { klass.new.foo}.to raise_error(CustomErrorForAnyInstanceSpec)
end
it "stubs a method that exists" do
klass.any_instance.stub(:existing_method).and_raise(CustomErrorForAnyInstanceSpec)
expect { klass.new.existing_method}.to raise_error(CustomErrorForAnyInstanceSpec)
end
end
context "with a block" do
it "stubs a method" do
klass.any_instance.stub(:foo) { 1 }
expect(klass.new.foo).to eq(1)
end
it "returns the same computed value for calls on different instances" do
klass.any_instance.stub(:foo) { 1 + 2 }
expect(klass.new.foo).to eq(klass.new.foo)
end
end
context "when partially mocking objects" do
let(:obj) { klass.new }
it "resets partially mocked objects correctly" do
allow_any_instance_of(klass).to receive(:existing_method).and_return("stubbed value")
# Simply resetting the proxy doesn't work
# what we need to have happen is
# ::RSpec::Mocks.any_instance_recorder_for(klass).stop_all_observation!
# but that is never invoked in ::
expect {
RSpec::Mocks.space.verify_all
}.to(
change { obj.existing_method }.from("stubbed value").to(:existing_method_return_value)
)
end
end
context "core ruby objects" do
it "works uniformly across *everything*" do
Object.any_instance.stub(:foo).and_return(1)
expect(Object.new.foo).to eq(1)
end
it "works with the non-standard constructor []" do
Array.any_instance.stub(:foo).and_return(1)
expect([].foo).to eq(1)
end
it "works with the non-standard constructor {}" do
Hash.any_instance.stub(:foo).and_return(1)
expect({}.foo).to eq(1)
end
it "works with the non-standard constructor \"\"" do
String.any_instance.stub(:foo).and_return(1)
expect("".foo).to eq(1)
end
it "works with the non-standard constructor \'\'" do
String.any_instance.stub(:foo).and_return(1)
expect(''.foo).to eq(1)
end
it "works with the non-standard constructor module" do
Module.any_instance.stub(:foo).and_return(1)
module RSpec::SampleRspecTestModule;end
expect(RSpec::SampleRspecTestModule.foo).to eq(1)
end
it "works with the non-standard constructor class" do
Class.any_instance.stub(:foo).and_return(1)
class RSpec::SampleRspecTestClass;end
expect(RSpec::SampleRspecTestClass.foo).to eq(1)
end
end
end
context "unstub implementation" do
it "replaces the stubbed method with the original method" do
klass.any_instance.stub(:existing_method)
klass.any_instance.unstub(:existing_method)
expect(klass.new.existing_method).to eq(:existing_method_return_value)
end
it "removes all stubs with the supplied method name" do
klass.any_instance.stub(:existing_method).with(1)
klass.any_instance.stub(:existing_method).with(2)
klass.any_instance.unstub(:existing_method)
expect(klass.new.existing_method).to eq(:existing_method_return_value)
end
it "removes stubs even if they have already been invoked" do
klass.any_instance.stub(:existing_method).and_return(:any_instance_value)
obj = klass.new
obj.existing_method
klass.any_instance.unstub(:existing_method)
expect(obj.existing_method).to eq(:existing_method_return_value)
end
it "removes stubs from sub class after invokation when super class was originally stubbed" do
klass.any_instance.stub(:existing_method).and_return(:any_instance_value)
obj = Class.new(klass).new
expect(obj.existing_method).to eq(:any_instance_value)
klass.any_instance.unstub(:existing_method)
expect(obj.existing_method).to eq(:existing_method_return_value)
end
it "does not remove any stubs set directly on an instance" do
klass.any_instance.stub(:existing_method).and_return(:any_instance_value)
obj = klass.new
obj.stub(:existing_method).and_return(:local_method)
klass.any_instance.unstub(:existing_method)
expect(obj.existing_method).to eq(:local_method)
end
it "does not remove any expectations with the same method name" do
klass.any_instance.should_receive(:existing_method_with_arguments).with(3).and_return(:three)
klass.any_instance.stub(:existing_method_with_arguments).with(1)
klass.any_instance.stub(:existing_method_with_arguments).with(2)
klass.any_instance.unstub(:existing_method_with_arguments)
expect(klass.new.existing_method_with_arguments(3)).to eq(:three)
end
it "raises a MockExpectationError if the method has not been stubbed" do
expect {
klass.any_instance.unstub(:existing_method)
}.to raise_error(RSpec::Mocks::MockExpectationError, 'The method `existing_method` was not stubbed or was already unstubbed')
end
end
context "with #should_not_receive" do
it "fails if the method is called" do
klass.any_instance.should_not_receive(:existing_method)
expect { klass.new.existing_method }.to raise_error(RSpec::Mocks::MockExpectationError)
end
it "passes if no method is called" do
expect { klass.any_instance.should_not_receive(:existing_method) }.to_not raise_error
end
it "passes if only a different method is called" do
klass.any_instance.should_not_receive(:existing_method)
expect { klass.new.another_existing_method }.to_not raise_error
end
context "with constraints" do
it "fails if the method is called with the specified parameters" do
klass.any_instance.should_not_receive(:existing_method_with_arguments).with(:argument_one, :argument_two)
expect {
klass.new.existing_method_with_arguments(:argument_one, :argument_two)
}.to raise_error(RSpec::Mocks::MockExpectationError)
end
it "passes if the method is called with different parameters" do
klass.any_instance.should_not_receive(:existing_method_with_arguments).with(:argument_one, :argument_two)
expect { klass.new.existing_method_with_arguments(:argument_three, :argument_four) }.to_not raise_error
end
end
context 'when used in combination with should_receive' do
it 'passes if only the expected message is received' do
klass.any_instance.should_receive(:foo)
klass.any_instance.should_not_receive(:bar)
klass.new.foo
RSpec::Mocks.space.verify_all
end
end
it "prevents confusing double-negative expressions involving `never`" do
expect {
klass.any_instance.should_not_receive(:not_expected).never
}.to raise_error(/trying to negate it again/)
end
end
context "with #should_receive" do
let(:foo_expectation_error_message) { 'Exactly one instance should have received the following message(s) but didn\'t: foo' }
let(:existing_method_expectation_error_message) { 'Exactly one instance should have received the following message(s) but didn\'t: existing_method' }
context "with an expectation is set on a method which does not exist" do
it "returns the expected value" do
klass.any_instance.should_receive(:foo).and_return(1)
expect(klass.new.foo(1)).to eq(1)
end
it "fails if an instance is created but no invocation occurs" do
expect do
klass.any_instance.should_receive(:foo)
klass.new
RSpec::Mocks.space.verify_all
end.to raise_error(RSpec::Mocks::MockExpectationError, foo_expectation_error_message)
end
it "fails if no instance is created" do
expect do
klass.any_instance.should_receive(:foo).and_return(1)
RSpec::Mocks.space.verify_all
end.to raise_error(RSpec::Mocks::MockExpectationError, foo_expectation_error_message)
end
it "fails if no instance is created and there are multiple expectations" do
expect do
klass.any_instance.should_receive(:foo)
klass.any_instance.should_receive(:bar)
RSpec::Mocks.space.verify_all
end.to raise_error(RSpec::Mocks::MockExpectationError, 'Exactly one instance should have received the following message(s) but didn\'t: bar, foo')
end
it "allows expectations on instances to take priority" do
klass.any_instance.should_receive(:foo)
klass.new.foo
instance = klass.new
instance.should_receive(:foo).and_return(result = Object.new)
expect(instance.foo).to eq(result)
end
context "behaves as 'exactly one instance'" do
it "passes if subsequent invocations do not receive that message" do
klass.any_instance.should_receive(:foo)
klass.new.foo
klass.new
end
it "fails if the method is invoked on a second instance" do
instance_one = klass.new
instance_two = klass.new
expect do
klass.any_instance.should_receive(:foo)
instance_one.foo
instance_two.foo
end.to raise_error(RSpec::Mocks::MockExpectationError, "The message 'foo' was received by #{instance_two.inspect} but has already been received by #{instance_one.inspect}")
end
end
context "normal expectations on the class object" do
it "fail when unfulfilled" do
expect do
klass.any_instance.should_receive(:foo)
klass.should_receive(:woot)
klass.new.foo
RSpec::Mocks.space.verify_all
end.to(raise_error(RSpec::Mocks::MockExpectationError) do |error|
expect(error.message).not_to eq(existing_method_expectation_error_message)
end)
end
it "pass when expectations are met" do
klass.any_instance.should_receive(:foo)
klass.should_receive(:woot).and_return(result = Object.new)
klass.new.foo
expect(klass.woot).to eq(result)
end
end
end
context "with an expectation is set on a method that exists" do
it "returns the expected value" do
klass.any_instance.should_receive(:existing_method).and_return(1)
expect(klass.new.existing_method(1)).to eq(1)
end
it "fails if an instance is created but no invocation occurs" do
expect do
klass.any_instance.should_receive(:existing_method)
klass.new
RSpec::Mocks.space.verify_all
end.to raise_error(RSpec::Mocks::MockExpectationError, existing_method_expectation_error_message)
end
it "fails if no instance is created" do
expect do
klass.any_instance.should_receive(:existing_method)
RSpec::Mocks.space.verify_all
end.to raise_error(RSpec::Mocks::MockExpectationError, existing_method_expectation_error_message)
end
it "fails if no instance is created and there are multiple expectations" do
expect do
klass.any_instance.should_receive(:existing_method)
klass.any_instance.should_receive(:another_existing_method)
RSpec::Mocks.space.verify_all
end.to raise_error(RSpec::Mocks::MockExpectationError, 'Exactly one instance should have received the following message(s) but didn\'t: another_existing_method, existing_method')
end
context "after any one instance has received a message" do
it "passes if subsequent invocations do not receive that message" do
klass.any_instance.should_receive(:existing_method)
klass.new.existing_method
klass.new
end
it "fails if the method is invoked on a second instance" do
instance_one = klass.new
instance_two = klass.new
expect do
klass.any_instance.should_receive(:existing_method)
instance_one.existing_method
instance_two.existing_method
end.to raise_error(RSpec::Mocks::MockExpectationError, "The message 'existing_method' was received by #{instance_two.inspect} but has already been received by #{instance_one.inspect}")
end
end
end
it 'works with a BasicObject subclass that mixes in Kernel', :if => defined?(BasicObject) do
klass = Class.new(BasicObject) do
include ::Kernel
def foo; end
end
klass.any_instance.should_receive(:foo)
klass.new.foo
end
it 'works with a SimpleDelegator subclass', :if => (RUBY_VERSION.to_f > 1.8) do
klass = Class.new(SimpleDelegator) do
def foo; end
end
klass.any_instance.should_receive(:foo)
klass.new(Object.new).foo
end
context "with argument matching" do
before do
klass.any_instance.should_receive(:foo).with(:param_one, :param_two).and_return(:result_one)
klass.any_instance.should_receive(:foo).with(:param_three, :param_four).and_return(:result_two)
end
it "returns the expected value when arguments match" do
instance = klass.new
expect(instance.foo(:param_one, :param_two)).to eq(:result_one)
expect(instance.foo(:param_three, :param_four)).to eq(:result_two)
end
it "fails when the arguments match but different instances are used" do
instances = Array.new(2) { klass.new }
expect do
expect(instances[0].foo(:param_one, :param_two)).to eq(:result_one)
expect(instances[1].foo(:param_three, :param_four)).to eq(:result_two)
end.to raise_error(RSpec::Mocks::MockExpectationError)
# ignore the fact that should_receive expectations were not met
instances.each { |instance| reset instance }
end
it "is not affected by the invocation of existing methods on other instances" do
expect(klass.new.existing_method_with_arguments(:param_one, :param_two)).to eq(:existing_method_with_arguments_return_value)
instance = klass.new
expect(instance.foo(:param_one, :param_two)).to eq(:result_one)
expect(instance.foo(:param_three, :param_four)).to eq(:result_two)
end
it "fails when arguments do not match" do
instance = klass.new
expect do
instance.foo(:param_one, :param_three)
end.to raise_error(RSpec::Mocks::MockExpectationError)
# ignore the fact that should_receive expectations were not met
reset instance
end
end
context "message count" do
context "the 'once' constraint" do
it "passes for one invocation" do
klass.any_instance.should_receive(:foo).once
klass.new.foo
end
it "fails when no instances are declared" do
expect do
klass.any_instance.should_receive(:foo).once
RSpec::Mocks.space.verify_all
end.to raise_error(RSpec::Mocks::MockExpectationError, foo_expectation_error_message)
end
it "fails when an instance is declared but there are no invocations" do
expect do
klass.any_instance.should_receive(:foo).once
klass.new
RSpec::Mocks.space.verify_all
end.to raise_error(RSpec::Mocks::MockExpectationError, foo_expectation_error_message)
end
it "fails for more than one invocation" do
expect do
klass.any_instance.should_receive(:foo).once
instance = klass.new
2.times { instance.foo }
verify instance
end.to raise_error(RSpec::Mocks::MockExpectationError)
end
end
context "the 'twice' constraint" do
it "passes for two invocations" do
klass.any_instance.should_receive(:foo).twice
instance = klass.new
2.times { instance.foo }
end
it "fails for more than two invocations" do
expect do
klass.any_instance.should_receive(:foo).twice
instance = klass.new
3.times { instance.foo }
verify instance
end.to raise_error(RSpec::Mocks::MockExpectationError)
end
end
context "the 'exactly(n)' constraint" do
it "passes for n invocations where n = 3" do
klass.any_instance.should_receive(:foo).exactly(3).times
instance = klass.new
3.times { instance.foo }
end
it "fails for n invocations where n < 3" do
expect do
klass.any_instance.should_receive(:foo).exactly(3).times
instance = klass.new
2.times { instance.foo }
verify instance
end.to raise_error(RSpec::Mocks::MockExpectationError)
end
it "fails for n invocations where n > 3" do
expect do
klass.any_instance.should_receive(:foo).exactly(3).times
instance = klass.new
4.times { instance.foo }
verify instance
end.to raise_error(RSpec::Mocks::MockExpectationError)
end
end
context "the 'at_least(n)' constraint" do
it "passes for n invocations where n = 3" do
klass.any_instance.should_receive(:foo).at_least(3).times
instance = klass.new
3.times { instance.foo }
end
it "fails for n invocations where n < 3" do
expect do
klass.any_instance.should_receive(:foo).at_least(3).times
instance = klass.new
2.times { instance.foo }
verify instance
end.to raise_error(RSpec::Mocks::MockExpectationError)
end
it "passes for n invocations where n > 3" do
klass.any_instance.should_receive(:foo).at_least(3).times
instance = klass.new
4.times { instance.foo }
end
end
context "the 'at_most(n)' constraint" do
it "passes for n invocations where n = 3" do
klass.any_instance.should_receive(:foo).at_most(3).times
instance = klass.new
3.times { instance.foo }
end
it "passes for n invocations where n < 3" do
klass.any_instance.should_receive(:foo).at_most(3).times
instance = klass.new
2.times { instance.foo }
end
it "fails for n invocations where n > 3" do
expect do
klass.any_instance.should_receive(:foo).at_most(3).times
instance = klass.new
4.times { instance.foo }
verify instance
end.to raise_error(RSpec::Mocks::MockExpectationError)
end
end
context "the 'never' constraint" do
it "passes for 0 invocations" do
klass.any_instance.should_receive(:foo).never
RSpec::Mocks.space.verify_all
end
it "fails on the first invocation" do
expect do
klass.any_instance.should_receive(:foo).never
klass.new.foo
end.to raise_error(RSpec::Mocks::MockExpectationError)
end
context "when combined with other expectations" do
it "passes when the other expecations are met" do
klass.any_instance.should_receive(:foo).never
klass.any_instance.should_receive(:existing_method).and_return(5)
expect(klass.new.existing_method).to eq(5)
end
it "fails when the other expecations are not met" do
expect do
klass.any_instance.should_receive(:foo).never
klass.any_instance.should_receive(:existing_method).and_return(5)
RSpec::Mocks.space.verify_all
end.to raise_error(RSpec::Mocks::MockExpectationError, existing_method_expectation_error_message)
end
end
end
end
end
context "when resetting post-verification" do
let(:space) { RSpec::Mocks.space }
context "existing method" do
before(:each) do
klass.any_instance # to force it to be tracked
end
context "with stubbing" do
context "public methods" do
before(:each) do
klass.any_instance.stub(:existing_method).and_return(1)
expect(klass.method_defined?(:__existing_method_without_any_instance__)).to be_truthy
end
it "restores the class to its original state after each example when no instance is created" do
space.verify_all
expect(klass.method_defined?(:__existing_method_without_any_instance__)).to be_falsey
expect(klass.new.existing_method).to eq(existing_method_return_value)
end
it "restores the class to its original state after each example when one instance is created" do
klass.new.existing_method
space.verify_all
expect(klass.method_defined?(:__existing_method_without_any_instance__)).to be_falsey
expect(klass.new.existing_method).to eq(existing_method_return_value)
end
it "restores the class to its original state after each example when more than one instance is created" do
klass.new.existing_method
klass.new.existing_method
space.verify_all
expect(klass.method_defined?(:__existing_method_without_any_instance__)).to be_falsey
expect(klass.new.existing_method).to eq(existing_method_return_value)
end
end
context "private methods" do
before :each do
klass.any_instance.stub(:private_method).and_return(:something)
space.verify_all
end
it "cleans up the backed up method" do
expect(klass.method_defined?(:__existing_method_without_any_instance__)).to be_falsey
end
it "restores a stubbed private method after the spec is run" do
expect(klass.private_method_defined?(:private_method)).to be_truthy
end
it "ensures that the restored method behaves as it originally did" do
expect(klass.new.send(:private_method)).to eq(:private_method_return_value)
end
end
end
context "with expectations" do
context "private methods" do
before :each do
klass.any_instance.should_receive(:private_method).and_return(:something)
klass.new.private_method
space.verify_all
end
it "cleans up the backed up method" do
expect(klass.method_defined?(:__existing_method_without_any_instance__)).to be_falsey
end
it "restores a stubbed private method after the spec is run" do
expect(klass.private_method_defined?(:private_method)).to be_truthy
end
it "ensures that the restored method behaves as it originally did" do
expect(klass.new.send(:private_method)).to eq(:private_method_return_value)
end
end
context "ensures that the subsequent specs do not see expectations set in previous specs" do
context "when the instance created after the expectation is set" do
it "first spec" do
klass.any_instance.should_receive(:existing_method).and_return(Object.new)
klass.new.existing_method
end
it "second spec" do
expect(klass.new.existing_method).to eq(existing_method_return_value)
end
end
context "when the instance created before the expectation is set" do
before :each do
@instance = klass.new
end
it "first spec" do
klass.any_instance.should_receive(:existing_method).and_return(Object.new)
@instance.existing_method
end
it "second spec" do
expect(@instance.existing_method).to eq(existing_method_return_value)
end
end
end
it "ensures that the next spec does not see that expectation" do
klass.any_instance.should_receive(:existing_method).and_return(Object.new)
klass.new.existing_method
space.verify_all
expect(klass.new.existing_method).to eq(existing_method_return_value)
end
end
end
context "with multiple calls to any_instance in the same example" do
it "does not prevent the change from being rolled back" do
klass.any_instance.stub(:existing_method).and_return(false)
klass.any_instance.stub(:existing_method).and_return(true)
RSpec::Mocks.space.verify_all
expect(klass.new).to respond_to(:existing_method)
expect(klass.new.existing_method).to eq(existing_method_return_value)
end
end
it "adds an class to the current space when #any_instance is invoked" do
expect {
klass.any_instance
}.to change { space.any_instance_recorders.size }.by(1)
end
it "adds an instance to the current space when stubbed method is invoked" do
klass.any_instance.stub(:foo)
instance = klass.new
instance.foo
expect(RSpec::Mocks.space.proxies.keys).to include(instance.object_id)
end
end
context "passing the receiver to the implementation block" do
context "when configured to pass the instance" do
include_context 'with isolated configuration'
before(:each) do
RSpec::Mocks.configuration.yield_receiver_to_any_instance_implementation_blocks = true
end
describe "an any instance stub" do
it "passes the instance as the first arg of the implementation block" do
instance = klass.new
expect { |b|
klass.any_instance.should_receive(:bees).with(:sup, &b)
instance.bees(:sup)
}.to yield_with_args(instance, :sup)
end
it "does not pass the instance to and_call_original" do
klass = Class.new do
def call(*args)
args.first
end
end
klass.any_instance.should_receive(:call).and_call_original
instance = klass.new
expect(instance.call(:bees)).to be :bees
end
end
describe "an any instance expectation" do
it "doesn't effect with" do
instance = klass.new
klass.any_instance.should_receive(:bees).with(:sup)
instance.bees(:sup)
end
it "passes the instance as the first arg of the implementation block" do
instance = klass.new
expect { |b|
klass.any_instance.should_receive(:bees).with(:sup, &b)
instance.bees(:sup)
}.to yield_with_args(instance, :sup)
end
end
end
context "when configured not to pass the instance" do
include_context 'with isolated configuration'
before(:each) do
RSpec::Mocks.configuration.yield_receiver_to_any_instance_implementation_blocks = false
end
describe "an any instance stub" do
it "does not pass the instance to the implementation block" do
instance = klass.new
expect { |b|
klass.any_instance.should_receive(:bees).with(:sup, &b)
instance.bees(:sup)
}.to yield_with_args(:sup)
end
it "does not cause with to fail when the instance is passed" do
instance = klass.new
klass.any_instance.should_receive(:bees).with(:faces)
instance.bees(:faces)
end
end
end
end
context 'when used in conjunction with a `dup`' do
it "doesn't cause an infinite loop" do
pending "This intermittently fails on JRuby" if RUBY_PLATFORM == 'java'
Object.any_instance.stub(:some_method)
o = Object.new
o.some_method
expect { o.dup.some_method }.to_not raise_error
end
it "doesn't bomb if the object doesn't support `dup`" do
klass = Class.new do
undef_method :dup
end
klass.any_instance
end
it "doesn't fail when dup accepts parameters" do
klass = Class.new do
def dup(funky_option)
end
end
klass.any_instance
expect { klass.new.dup('Dup dup dup') }.to_not raise_error
end
end
context "when directed at a method defined on a superclass" do
let(:sub_klass) { Class.new(klass) }
it "stubs the method correctly" do
klass.any_instance.stub(:existing_method).and_return("foo")
expect(sub_klass.new.existing_method).to eq "foo"
end
it "mocks the method correctly" do
instance_one = sub_klass.new
instance_two = sub_klass.new
expect do
klass.any_instance.should_receive(:existing_method)
instance_one.existing_method
instance_two.existing_method
end.to raise_error(RSpec::Mocks::MockExpectationError, "The message 'existing_method' was received by #{instance_two.inspect} but has already been received by #{instance_one.inspect}")
end
end
context "when a class overrides Object#method" do
let(:http_request_class) { Struct.new(:method, :uri) }
it "stubs the method correctly" do
http_request_class.any_instance.stub(:existing_method).and_return("foo")
expect(http_request_class.new.existing_method).to eq "foo"