tests/test_multibindings_bind_provider.py

#!/usr/bin/env python3
#  Copyright 2016 Google Inc. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS-IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

from absl.testing import parameterized
from fruit_test_common import *

COMMON_DEFINITIONS = '''
    #include "test_common.h"

    struct Annotation1 {};
    struct Annotation2 {};
    
    template <typename T>
    using WithNoAnnot = T;
    
    template <typename T>
    using WithAnnot1 = fruit::Annotated<Annotation1, T>;
    '''

class TestMultibindingsBindProvider(parameterized.TestCase):
    @parameterized.parameters([
        'X()',
        'new X()',
    ])
    def test_bind_multibinding_provider_success(self, ConstructX):
        source = '''
            struct X : public ConstructionTracker<X> {
              INJECT(X()) = default;
            };
    
            fruit::Component<> getComponent() {
              return fruit::createComponent()
                .addMultibindingProvider([](){return ConstructX;});
            }
    
            int main() {
              fruit::Injector<> injector(getComponent);
    
              Assert(X::num_objects_constructed == 0);
              Assert(injector.getMultibindings<X>().size() == 1);
              Assert(X::num_objects_constructed == 1);
            }
            '''
        expect_success(
            COMMON_DEFINITIONS,
            source,
            locals())

    @parameterized.parameters([
        'WithNoAnnot',
        'WithAnnot1',
    ])
    def test_bind_multibinding_provider_abstract_class_success(self, WithAnnot):
        source = '''
            struct I {
              virtual int foo() = 0;
              virtual ~I() = default;
            };
            
            struct X : public I {
              int foo() override {
                return 5;
              }
            };
    
            fruit::Component<> getComponent() {
              return fruit::createComponent()
                .addMultibindingProvider<WithAnnot<I*>()>([](){return static_cast<I*>(new X());});
            }
    
            int main() {
              fruit::Injector<> injector(getComponent);
    
              Assert(injector.getMultibindings<WithAnnot<I>>().size() == 1);
              Assert(injector.getMultibindings<WithAnnot<I>>()[0]->foo() == 5);
            }
            '''
        expect_success(
            COMMON_DEFINITIONS,
            source,
            locals())

    @parameterized.parameters([
        'WithNoAnnot',
        'WithAnnot1',
    ])
    def test_bind_multibinding_provider_abstract_class_with_no_virtual_destructor_error(self, WithAnnot):
        source = '''
            struct I {
              virtual int foo() = 0;
            };
            
            struct X : public I {
              int foo() override {
                return 5;
              }
            };
    
            fruit::Component<> getComponent() {
              return fruit::createComponent()
                .addMultibindingProvider<WithAnnot<I*>()>([](){return static_cast<I*>(new X());});
            }
            '''
        expect_compile_error(
            'MultibindingProviderReturningPointerToAbstractClassWithNoVirtualDestructorError<I>',
            r'registerMultibindingProvider\(\) was called with a lambda that returns a pointer to T, but T is an abstract class with no virtual destructor',
            COMMON_DEFINITIONS,
            source,
            locals())

    @multiple_parameters([
        ('X()', 'X'),
        ('new X()', 'X*'),
    ], [
        'WithNoAnnot',
        'WithAnnot1',
    ], [
        'Y',
        'const Y',
        'Y*',
        'const Y*',
        'Y&',
        'const Y&',
        'std::shared_ptr<Y>',
        'fruit::Provider<Y>',
        'fruit::Provider<const Y>',
    ])
    def test_bind_multibinding_provider_with_param_success(self, ConstructX, XPtr, WithAnnot, YVariant):
        source = '''
            struct Y {};
        
            struct X : public ConstructionTracker<X> {};
            
            fruit::Component<WithAnnot<Y>> getYComponent() {
              return fruit::createComponent()
                .registerConstructor<WithAnnot<Y>()>();
            }
    
            fruit::Component<> getComponent() {
              return fruit::createComponent()
                .install(getYComponent)
                .addMultibindingProvider<XPtr(WithAnnot<YVariant>)>([](YVariant){ return ConstructX; });
            }
    
            int main() {
              fruit::Injector<> injector(getComponent);
    
              Assert(X::num_objects_constructed == 0);
              Assert(injector.getMultibindings<X>().size() == 1);
              Assert(X::num_objects_constructed == 1);
            }
            '''
        expect_success(
            COMMON_DEFINITIONS,
            source,
            locals())

    @multiple_parameters([
        ('X()', 'X'),
        ('new X()', 'X*'),
    ], [
        'WithNoAnnot',
        'WithAnnot1',
    ], [
        'Y',
        'const Y',
        'const Y*',
        'const Y&',
        'fruit::Provider<const Y>',
    ])
    def test_bind_multibinding_provider_with_param_const_binding_success(self, ConstructX, XPtr, WithAnnot, YVariant):
        source = '''
            struct Y {};
        
            struct X : public ConstructionTracker<X> {};
            
            const Y y{};
            
            fruit::Component<WithAnnot<const Y>> getYComponent() {
              return fruit::createComponent()
                .bindInstance<WithAnnot<Y>, Y>(y);
            }
    
            fruit::Component<> getComponent() {
              return fruit::createComponent()
                .install(getYComponent)
                .addMultibindingProvider<XPtr(WithAnnot<YVariant>)>([](YVariant){ return ConstructX; });
            }
    
            int main() {
              fruit::Injector<> injector(getComponent);
    
              Assert(X::num_objects_constructed == 0);
              Assert(injector.getMultibindings<X>().size() == 1);
              Assert(X::num_objects_constructed == 1);
            }
            '''
        expect_success(
            COMMON_DEFINITIONS,
            source,
            locals())

    @multiple_parameters([
        ('X()', 'X'),
        ('new X()', 'X*'),
    ], [
        ('WithNoAnnot', 'Y'),
        ('WithAnnot1', 'fruit::Annotated<Annotation1, Y>'),
    ], [
        'Y*',
        'Y&',
        'std::shared_ptr<Y>',
        'fruit::Provider<Y>',
    ])
    def test_bind_multibinding_provider_with_param_error_nonconst_param_required(self, ConstructX, XPtr, WithAnnot, YAnnotRegex, YVariant):
        source = '''
            struct Y {};
            struct X {};
            
            fruit::Component<WithAnnot<const Y>> getYComponent();
    
            fruit::Component<> getComponent() {
              return fruit::createComponent()
                .install(getYComponent)
                .addMultibindingProvider<XPtr(WithAnnot<YVariant>)>([](YVariant){ return ConstructX; });
            }
            '''
        expect_compile_error(
            'NonConstBindingRequiredButConstBindingProvidedError<YAnnotRegex>',
            'The type T was provided as constant, however one of the constructors/providers/factories in this component',
            COMMON_DEFINITIONS,
            source,
            locals())

    @multiple_parameters([
        ('X()', 'X'),
        ('new X()', 'X*'),
    ], [
        ('WithNoAnnot', 'Y'),
        ('WithAnnot1', 'fruit::Annotated<Annotation1, Y>'),
    ], [
        'Y*',
        'Y&',
        'std::shared_ptr<Y>',
        'fruit::Provider<Y>',
    ])
    def test_bind_multibinding_provider_with_param_error_nonconst_param_required_install_after(self, ConstructX, XPtr, WithAnnot, YAnnotRegex, YVariant):
        source = '''
            struct Y {};
            struct X {};
            
            fruit::Component<WithAnnot<const Y>> getYComponent();
    
            fruit::Component<> getComponent() {
              return fruit::createComponent()
                .addMultibindingProvider<XPtr(WithAnnot<YVariant>)>([](YVariant){ return ConstructX; })
                .install(getYComponent);
            }
            '''
        expect_compile_error(
            'NonConstBindingRequiredButConstBindingProvidedError<YAnnotRegex>',
            'The type T was provided as constant, however one of the constructors/providers/factories in this component',
            COMMON_DEFINITIONS,
            source,
            locals())

    def test_bind_multibinding_provider_requiring_nonconst_then_requiring_const_ok(self):
        source = '''
            struct X {};
            struct Y {};
    
            fruit::Component<> getRootComponent() {
              return fruit::createComponent()
                .addMultibindingProvider([](X&) { return Y(); })
                .addMultibindingProvider([](const X&) { return Y(); })
                .registerConstructor<X()>();
            }
            
            int main() {
              fruit::Injector<> injector(getRootComponent);
              injector.getMultibindings<Y>();
            }
            '''
        expect_success(
            COMMON_DEFINITIONS,
            source,
            locals())

    def test_bind_multibinding_provider_requiring_nonconst_then_requiring_const_declaring_const_requirement_error(self):
        source = '''
            struct X {};
            struct Y {};
    
            fruit::Component<fruit::Required<const X>> getRootComponent() {
              return fruit::createComponent()
                .addMultibindingProvider([](X&) { return Y(); })
                .addMultibindingProvider([](const X&) { return Y(); });
            }
            '''
        expect_compile_error(
            'ConstBindingDeclaredAsRequiredButNonConstBindingRequiredError<X>',
            'The type T was declared as a const Required type in the returned Component, however',
            COMMON_DEFINITIONS,
            source,
            locals())

    def test_bind_multibinding_provider_requiring_const_then_requiring_nonconst_ok(self):
        source = '''
            struct X {};
            struct Y {};
    
            fruit::Component<> getRootComponent() {
              return fruit::createComponent()
                .addMultibindingProvider([](const X&) { return Y(); })
                .addMultibindingProvider([](X&) { return Y(); })
                .registerConstructor<X()>();
            }
            
            int main() {
              fruit::Injector<> injector(getRootComponent);
              injector.getMultibindings<Y>();
            }
            '''
        expect_success(
            COMMON_DEFINITIONS,
            source,
            locals())

    def test_bind_multibinding_provider_requiring_const_then_requiring_nonconst_declaring_const_requirement_error(self):
        source = '''
            struct X {};
            struct Y {};
    
            fruit::Component<fruit::Required<const X>> getRootComponent() {
              return fruit::createComponent()
                .addMultibindingProvider([](const X&) { return Y(); })
                .addMultibindingProvider([](X&) { return Y(); });
            }
            '''
        expect_compile_error(
            'ConstBindingDeclaredAsRequiredButNonConstBindingRequiredError<X>',
            'The type T was declared as a const Required type in the returned Component, however',
            COMMON_DEFINITIONS,
            source,
            locals())

    @multiple_parameters([
        ('X()', 'X'),
        ('new X()', 'X*'),
    ], [
        ('Y', 'Y', 'Y**', r'Y\*\*'),
        ('Y', 'Y', 'std::shared_ptr<Y>*', r'std::shared_ptr<Y>\*'),
        ('Y', 'const Y', 'Y**', r'Y\*\*'),
        ('Y', 'const Y', 'std::shared_ptr<Y>*', r'std::shared_ptr<Y>\*'),
        ('fruit::Annotated<Annotation1, Y>', 'fruit::Annotated<Annotation1, Y>', 'Y**', r'Y\*\*'),
        ('fruit::Annotated<Annotation1, Y>', 'fruit::Annotated<Annotation1, const Y>', 'Y**', r'Y\*\*'),
    ])
    def test_bind_multibinding_provider_with_param_error_type_not_injectable(self, ConstructX, XPtr, YAnnot, ConstYAnnot, YVariant, YVariantRegex):
        source = '''
            struct Y {};
            struct X {};
            
            fruit::Component<> getComponent() {
              return fruit::createComponent()
                .addMultibindingProvider<XPtr(YVariant)>([](YVariant){ return ConstructX; });
            }
            '''
        expect_compile_error(
            'NonInjectableTypeError<YVariantRegex>',
            'The type T is not injectable.',
            COMMON_DEFINITIONS,
            source,
            locals())

    @parameterized.parameters([
        ('X()', 'X', 'X'),
        ('X()', 'fruit::Annotated<Annotation1, X>', 'fruit::Annotated<Annotation1, X>'),
        ('new X()', 'X', 'X*'),
        ('new X()', 'fruit::Annotated<Annotation1, X>', 'fruit::Annotated<Annotation1, X*>'),
    ])
    def test_bind_multibinding_provider_explicit_signature_success(self, ConstructX, XAnnot, XPtrAnnot):
        source = '''
            struct X : public ConstructionTracker<X> {
              INJECT(X()) = default;
    
              static bool constructed;
            };
    
            fruit::Component<> getComponent() {
              return fruit::createComponent()
                .addMultibindingProvider<XPtrAnnot()>([](){return ConstructX;});
            }
    
            int main() {
              fruit::Injector<> injector(getComponent);
    
              Assert(X::num_objects_constructed == 0);
              Assert(injector.getMultibindings<XAnnot>().size() == 1);
              Assert(X::num_objects_constructed == 1);
            }
            '''
        expect_success(
            COMMON_DEFINITIONS,
            source,
            locals())

    @parameterized.parameters([
        ('X()', 'X', 'X'),
        ('X()', 'fruit::Annotated<Annotation1, X>', 'fruit::Annotated<Annotation1, X>'),
        ('new X()', 'X', 'X*'),
        ('new X()', 'fruit::Annotated<Annotation1, X>', 'fruit::Annotated<Annotation1, X*>'),
    ])
    def test_bind_multibinding_provider_explicit_signature_with_normalized_component_success(self, ConstructX, XAnnot, XPtrAnnot):
        source = '''
            struct X : public ConstructionTracker<X> {
              INJECT(X()) = default;
    
              static bool constructed;
            };
    
            fruit::Component<> getComponent() {
              return fruit::createComponent()
                .addMultibindingProvider<XPtrAnnot()>([](){return ConstructX;});
            }
            
            fruit::Component<> getEmptyComponent() {
              return fruit::createComponent();
            }
    
            int main() {
              fruit::NormalizedComponent<> normalizedComponent(getComponent);
              fruit::Injector<> injector(normalizedComponent, getEmptyComponent);
    
              Assert(X::num_objects_constructed == 0);
              Assert(injector.getMultibindings<XAnnot>().size() == 1);
              Assert(X::num_objects_constructed == 1);
            }
            '''
        expect_success(
            COMMON_DEFINITIONS,
            source,
            locals())

    @parameterized.parameters([
        ('X', 'X*', 'int'),
        ('fruit::Annotated<Annotation1, X>', 'fruit::Annotated<Annotation1, X*>', 'fruit::Annotated<Annotation2, int>'),
    ])
    def test_multiple_providers(self, XAnnot, XPtrAnnot, intAnnot):
        source = '''
            struct X {};
    
            fruit::Component<> getComponent() {
              return fruit::createComponent()
                .registerProvider<intAnnot()>([](){return 42;})
                .addMultibindingProvider<XAnnot(intAnnot)>([](int){return X();})
                .addMultibindingProvider<XPtrAnnot(intAnnot)>([](int){return new X();});
            }
    
            int main() {
              fruit::Injector<> injector(getComponent);
    
              std::vector<X*> multibindings = injector.getMultibindings<XAnnot>();
              Assert(multibindings.size() == 2);
            }
            '''
        expect_success(
            COMMON_DEFINITIONS,
            source,
            locals())

    @multiple_parameters([
        'X()',
        'new X()',
    ], [
        'X',
        'fruit::Annotated<Annotation1, X>',
    ])
    def test_bind_multibinding_provider_malformed_signature(self, ConstructX, XAnnot):
        source = '''
            struct X {};
    
            fruit::Component<> getComponent() {
              return fruit::createComponent()
                .addMultibindingProvider<XAnnot>([](){return ConstructX;});
            }
            '''
        expect_compile_error(
            'NotASignatureError<XAnnot>',
            'CandidateSignature was specified as parameter, but it.s not a signature.',
            COMMON_DEFINITIONS,
            source,
            locals())

    @multiple_parameters([
        'X(n)',
        'new X(n)',
    ], [
        'X',
        'fruit::Annotated<Annotation1, X>',
    ])
    def test_bind_multibinding_provider_lambda_with_captures_error(self, ConstructX, XAnnot):
        source = '''
            struct X {
              X(int) {}
            };
    
            fruit::Component<> getComponent() {
              int n = 3;
              return fruit::createComponent()
                .addMultibindingProvider<XAnnot()>([=]{return ConstructX;});
            }
            '''
        expect_compile_error(
            'FunctorUsedAsProviderError<.*>',
            'A stateful lambda or a non-lambda functor was used as provider',
            COMMON_DEFINITIONS,
            source,
            locals())

    # TODO: should XPtrAnnot be just XAnnot in the signature?
    # Make sure the behavior here is consistent with registerProvider() and registerFactory().
    @parameterized.parameters([
        ('X', 'X*', '(struct )?X'),
        ('fruit::Annotated<Annotation1, X>', 'fruit::Annotated<Annotation1, X*>', '(struct )?fruit::Annotated<(struct )?Annotation1, ?(struct )?X>'),
    ])
    def test_provider_returns_nullptr_error(self, XAnnot, XPtrAnnot, XAnnotRegex):
        source = '''
            struct X {};
    
            fruit::Component<> getComponent() {
              return fruit::createComponent()
                  .addMultibindingProvider<XPtrAnnot()>([](){return (X*)nullptr;});
            }
    
            int main() {
              fruit::Injector<> injector(getComponent);
              injector.getMultibindings<XAnnot>();
            }
            '''
        expect_runtime_error(
            'Fatal injection error: attempting to get an instance for the type XAnnotRegex but the provider returned nullptr',
            COMMON_DEFINITIONS,
            source,
            locals())

if __name__ == '__main__':
    absltest.main()