Add additional specs for contract validation (#37)

The specs for contract validation did not specifically test for the
cases where a contract class had methods specifying rest (**args),
keyrest (**kwargs) or block (&block) parameters.

Add tests for these cases to protect against bugs being introduced to
the validation.

spec/sinject/container_spec.rb

@@ -260,6 +260,132 @@ def with_args(first, second = false, third = true, fourth:, fifth:, sixth: true)
  expect(container.registered?(:foo)).to be_truthy
  end
  end
+
+ context 'that specifies rest parameters' do
+ let(:contract) do
+ Class.new do
+ def with_rest_args(first, second, *args); end
+ end
+ end
+
+ context 'and the class does not specify them' do
+ it 'raises DependencyContractInvalidParametersException' do
+ klass = Class.new do
+ def with_rest_args(first, second); end
+ end
+
+ expect { container.register(key: :foo, class: klass, contract: contract) }
+ .to raise_error Sinject::DependencyContractInvalidParametersException
+ end
+ end
+
+ context 'and the class specifies an additional parameter' do
+ it 'raises DependencyContractInvalidParametersException' do
+ klass = Class.new do
+ def with_rest_args(first, second, args); end
+ end
+
+ expect { container.register(key: :foo, class: klass, contract: contract) }
+ .to raise_error Sinject::DependencyContractInvalidParametersException
+ end
+ end
+
+ context 'and the class specifies the rest arguments' do
+ it 'registers the dependency' do
+ klass = Class.new do
+ def with_rest_args(first, second, *args); end
+ end
+
+ container.register(key: :foo, class: klass, contract: contract)
+ expect(container.registered?(:foo)).to be_truthy
+ end
+ end
+ end
+
+ context 'that specifies keyrest parameters' do
+ let(:contract) do
+ Class.new do
+ def with_kwrest_args(foo, bar:, **kwargs); end
+ end
+ end
+
+ context 'and the class does not specify them' do
+ it 'raises DependencyContractInvalidParametersException' do
+ klass = Class.new do
+ def with_kwrest_args(foo, bar:); end
+ end
+
+ expect { container.register(key: :foo, class: klass, contract: contract) }
+ .to raise_error Sinject::DependencyContractInvalidParametersException
+ end
+ end
+
+ context 'and the class specifies a required keyword param of the same name' do
+ it 'raises DependencyContractInvalidParametersException' do
+ klass = Class.new do
+ def with_kwrest_args(foo, bar:, kwargs:); end
+ end
+
+ expect { container.register(key: :foo, class: klass, contract: contract) }
+ .to raise_error Sinject::DependencyContractInvalidParametersException
+ end
+ end
+
+ context 'and the class specifies an optional keyword param of the same name' do
+ it 'raises DependencyContractInvalidParametersException' do
+ pending('Bug: If the contract specifies keyrest params, '\
+ 'the class should pass validation only if it also specifies keyrest args')
+
+ klass = Class.new do
+ def with_kwrest_args(foo, bar:, kwargs: nil); end
+ end
+
+ expect { container.register(key: :foo, class: klass, contract: contract) }
+ .to raise_error Sinject::DependencyContractInvalidParametersException
+ end
+ end
+
+ context 'and the class specifies them' do
+ it 'registers the dependency' do
+ klass = Class.new do
+ def with_kwrest_args(foo, bar:, **kwargs); end
+ end
+
+ container.register(key: :foo, class: klass, contract: contract)
+ expect(container.registered?(:foo)).to be_truthy
+ end
+ end
+ end
+
+ context 'when the contract expects a block' do
+ let(:contract) do
+ Class.new do
+ def with_block(foo, &block); end
+ end
+ end
+
+ context 'and the class does not' do
+ it 'raises DependencyContractInvalidParametersException' do
+ klass = Class.new do
+ def with_block(foo); end
+ end
+
+ expect { container.register(key: :foo, class: klass, contract: contract) }
+ .to raise_error Sinject::DependencyContractInvalidParametersException
+ end
+ end
+
+ context 'and the class does too' do
+ it 'registers the dependency' do
+ klass = Class.new do
+ def with_block(foo, &block); end
+ end
+
+ container.register(key: :foo, class: klass, contract: contract)
+ expect(container.registered?(:foo)).to be_truthy
+ end
+ end
+ end
  end
  end