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 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;
    '''

def test_eager_injection_deprecated():
    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():
    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__':
    main(__file__)