tests/meta/test_graph.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 = '''
    #define IN_FRUIT_CPP_FILE
    
    #include "meta/common.h"
    #include <fruit/impl/meta/graph.h>
    
    struct A1 {};
    struct B1 {};
    struct C1 {};
    struct D1 {};
    struct E1 {};
    
    using A = Type<A1>;
    using B = Type<B1>;
    using C = Type<C1>;
    using D = Type<D1>;
    using E = Type<E1>;
    '''

def test_GraphFindLoop():
    source = '''
        int main() {
          // A -> B, D
          // C -> D
          AssertSameType(Id<GraphFindLoop(Vector<Pair<A, Vector<B, D>>, Pair<C, Vector<D>>, Pair<B, Vector<>>>)>, None);
        
          // A -> B
          // B -> B
          // C -> B
          AssertSameType(Id<GraphFindLoop(Vector<Pair<A, Vector<B>>, Pair<B, Vector<B>>, Pair<C, Vector<B>>>)>, Vector<B>);
        
          // A -> D, B
          // B -> C
          // C -> A
          // The order in the result here *does* matter, but rotations of the correct (A,B,C) sequence are also ok.
          // Fix this test as appropriate.
          AssertSameType(Id<GraphFindLoop(Vector<Pair<A, Vector<D, B>>, Pair<B, Vector<C>>, Pair<C, Vector<A>>>)>, Vector<B, C, A>);
        }
        '''
    expect_success(
        COMMON_DEFINITIONS,
        source,
        locals())

if __name__== '__main__':
    main(__file__)