tests/test_eager_injection.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 X {
      INJECT(X()) {
        Assert(!constructed);
        constructed = true;
      }
      
      static bool constructed;
    };
    
    bool X::constructed = false;
    
    struct Y {
      Y() {
        Assert(!constructed);
        constructed = true;
      }
      
      static bool constructed;
    };
    
    bool Y::constructed = false;
    
    struct Z {
      Z() {
        Assert(!constructed);
        constructed = true;
      }
      
      static bool constructed;
    };
    
    bool Z::constructed = false;
    '''

class TestEagerInjection(parameterized.TestCase):
    def test_eager_injection_deprecated(self):
        source = '''
            fruit::Component<X> getComponent() {
              return fruit::createComponent()
                .addMultibindingProvider([](){return new Y();})
                .registerConstructor<Z()>();
            }
            
            int main() {
              
              fruit::Injector<X> injector(getComponent);
              
              Assert(!X::constructed);
              Assert(!Y::constructed);
              Assert(!Z::constructed);
              
              injector.eagerlyInjectAll();
              
              Assert(X::constructed);
              Assert(Y::constructed);
              // Z still not constructed, it's not reachable from Injector<X>.
              Assert(!Z::constructed);
              
              return 0;
            }
            '''
        expect_generic_compile_error(
            'deprecation|deprecated',
            COMMON_DEFINITIONS,
            source)

    def test_eager_injection(self):
        source = '''
            fruit::Component<X> getComponent() {
              return fruit::createComponent()
                .addMultibindingProvider([](){return new Y();})
                .registerConstructor<Z()>();
            }
            
            int main() {
              
              fruit::Injector<X> injector(getComponent);
              
              Assert(!X::constructed);
              Assert(!Y::constructed);
              Assert(!Z::constructed);
              
              injector.eagerlyInjectAll();
              
              Assert(X::constructed);
              Assert(Y::constructed);
              // Z still not constructed, it's not reachable from Injector<X>.
              Assert(!Z::constructed);
              
              return 0;
            }
            '''
        expect_success(
            COMMON_DEFINITIONS,
            source,
            locals(),
            ignore_deprecation_warnings=True)

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