Fix issue with union type

[sav007]

Closes #183

[digitalbuddha]

better but not perfect.
this works:

 {
     program(id:$id) {
       firstLoad {
         ...onBlock
       }
     }
   }

   fragment onBlock on Block {
     title
     showTitle
     showMore
     showSection
     firstLoad {
       ... onAssetsConnection
     }
     moreAssets {
       ... onAssetsConnection
     }
   }

   fragment onAssetsConnection on AssetsConnection {
     edges {
        node {
         ... assetFragment
       }
     }
   }

   fragment assetFragment on Article {
                promo_summary

   }

This does not work

query SimpleQuery($id:String!)
 {
     program(id:$id) {
       firstLoad {
         ...onBlock
       }
     }
   }

   fragment onBlock on Block {
     title
     showTitle
     showMore
     showSection
     firstLoad {
       ... onAssetsConnection
     }
     moreAssets {
       ... onAssetsConnection
     }
   }

   fragment onAssetsConnection on AssetsConnection {
     edges {
       node {

         ... on Article {
           promo_summary
         }
       }
     }
   }

[digitalbuddha]

for reference here are the IR that was generated
this is the one that does not compile

{
    "operations": [
        {
            "filePath": "/Users/206847/apollo-android-copy/apollo-sample/src/main/graphql/com/example/foo.graphql",
            "operationName": "SimpleQuery",
            "operationType": "query",
            "variables": [],
            "source": "query SimpleQuery {\n  program(id: \"mobile-home\") {\n    __typename\n    firstLoad {\n      __typename\n      ...onBlock\n    }\n  }\n}",
            "fields": [
                {
                    "responseName": "program",
                    "fieldName": "program",
                    "type": "Program",
                    "args": [
                        {
                            "name": "id",
                            "value": "mobile-home"
                        }
                    ],
                    "fields": [
                        {
                            "responseName": "firstLoad",
                            "fieldName": "firstLoad",
                            "type": "[Programmable]",
                            "fields": [],
                            "fragmentSpreads": [
                                "onBlock"
                            ],
                            "inlineFragments": []
                        }
                    ],
                    "fragmentSpreads": [],
                    "inlineFragments": []
                }
            ],
            "fragmentsReferenced": [
                "onBlock",
                "onAssetsConnection"
            ]
        }
    ],
    "fragments": [
        {
            "filePath": "/Users/206847/apollo-android-copy/apollo-sample/src/main/graphql/com/example/foo.graphql",
            "fragmentName": "onBlock",
            "source": "fragment onBlock on Block {\n  __typename\n  title\n  showTitle\n  showMore\n  showSection\n  firstLoad {\n    __typename\n    ...onAssetsConnection\n  }\n  moreAssets {\n    __typename\n    ...onAssetsConnection\n  }\n}",
            "typeCondition": "Block",
            "fields": [
                {
                    "responseName": "title",
                    "fieldName": "title",
                    "type": "String"
                },
                {
                    "responseName": "showTitle",
                    "fieldName": "showTitle",
                    "type": "Boolean"
                },
                {
                    "responseName": "showMore",
                    "fieldName": "showMore",
                    "type": "Boolean!"
                },
                {
                    "responseName": "showSection",
                    "fieldName": "showSection",
                    "type": "Boolean"
                },
                {
                    "responseName": "firstLoad",
                    "fieldName": "firstLoad",
                    "type": "AssetsConnection",
                    "fields": [],
                    "fragmentSpreads": [
                        "onAssetsConnection"
                    ],
                    "inlineFragments": []
                },
                {
                    "responseName": "moreAssets",
                    "fieldName": "moreAssets",
                    "type": "AssetsConnection",
                    "fields": [],
                    "fragmentSpreads": [
                        "onAssetsConnection"
                    ],
                    "inlineFragments": []
                }
            ],
            "fragmentSpreads": [],
            "inlineFragments": [],
            "fragmentsReferenced": [
                "onAssetsConnection"
            ]
        },
        {
            "filePath": "/Users/206847/apollo-android-copy/apollo-sample/src/main/graphql/com/example/foo.graphql",
            "fragmentName": "onAssetsConnection",
            "source": "fragment onAssetsConnection on AssetsConnection {\n  __typename\n  edges {\n    __typename\n    node {\n      __typename\n      ... on Article {\n        __typename\n        promo_summary\n      }\n    }\n  }\n}",
            "typeCondition": "AssetsConnection",
            "fields": [
                {
                    "responseName": "edges",
                    "fieldName": "edges",
                    "type": "[AssetsEdge]",
                    "fields": [
                        {
                            "responseName": "node",
                            "fieldName": "node",
                            "type": "Asset",
                            "fields": [],
                            "fragmentSpreads": [],
                            "inlineFragments": [
                                {
                                    "typeCondition": "Article",
                                    "fields": [
                                        {
                                            "responseName": "promo_summary",
                                            "fieldName": "promo_summary",
                                            "type": "String"
                                        }
                                    ],
                                    "fragmentSpreads": []
                                }
                            ]
                        }
                    ],
                    "fragmentSpreads": [],
                    "inlineFragments": []
                }
            ],
            "fragmentSpreads": [],
            "inlineFragments": [],
            "fragmentsReferenced": []
        }
    ],
    "typesUsed": []
}

[12:17]
now this is the working one with fragments seperated:

{
    "operations": [
        {
            "filePath": "/Users/206847/apollo-android-copy/apollo-sample/src/main/graphql/com/example/foo.graphql",
            "operationName": "SimpleQuery",
            "operationType": "query",
            "variables": [],
            "source": "query SimpleQuery {\n  program(id: \"mobile-home\") {\n    __typename\n    firstLoad {\n      __typename\n      ...onBlock\n    }\n  }\n}",
            "fields": [
                {
                    "responseName": "program",
                    "fieldName": "program",
                    "type": "Program",
                    "args": [
                        {
                            "name": "id",
                            "value": "mobile-home"
                        }
                    ],
                    "fields": [
                        {
                            "responseName": "firstLoad",
                            "fieldName": "firstLoad",
                            "type": "[Programmable]",
                            "fields": [],
                            "fragmentSpreads": [
                                "onBlock"
                            ],
                            "inlineFragments": []
                        }
                    ],
                    "fragmentSpreads": [],
                    "inlineFragments": []
                }
            ],
            "fragmentsReferenced": [
                "onBlock",
                "onAssetsConnection",
                "assetFragment"
            ]
        }
    ],
    "fragments": [
        {
            "filePath": "/Users/206847/apollo-android-copy/apollo-sample/src/main/graphql/com/example/foo.graphql",
            "fragmentName": "onBlock",
            "source": "fragment onBlock on Block {\n  __typename\n  title\n  showTitle\n  showMore\n  showSection\n  firstLoad {\n    __typename\n    ...onAssetsConnection\n  }\n  moreAssets {\n    __typename\n    ...onAssetsConnection\n  }\n}",
            "typeCondition": "Block",
            "fields": [
                {
                    "responseName": "title",
                    "fieldName": "title",
                    "type": "String"
                },
                {
                    "responseName": "showTitle",
                    "fieldName": "showTitle",
                    "type": "Boolean"
                },
                {
                    "responseName": "showMore",
                    "fieldName": "showMore",
                    "type": "Boolean!"
                },
                {
                    "responseName": "showSection",
                    "fieldName": "showSection",
                    "type": "Boolean"
                },
                {
                    "responseName": "firstLoad",
                    "fieldName": "firstLoad",
                    "type": "AssetsConnection",
                    "fields": [],
                    "fragmentSpreads": [
                        "onAssetsConnection"
                    ],
                    "inlineFragments": []
                },
                {
                    "responseName": "moreAssets",
                    "fieldName": "moreAssets",
                    "type": "AssetsConnection",
                    "fields": [],
                    "fragmentSpreads": [
                        "onAssetsConnection"
                    ],
                    "inlineFragments": []
                }
            ],
            "fragmentSpreads": [],
            "inlineFragments": [],
            "fragmentsReferenced": [
                "onAssetsConnection",
                "assetFragment"
            ]
        },
        {
            "filePath": "/Users/206847/apollo-android-copy/apollo-sample/src/main/graphql/com/example/foo.graphql",
            "fragmentName": "onAssetsConnection",
            "source": "fragment onAssetsConnection on AssetsConnection {\n  __typename\n  edges {\n    __typename\n    node {\n      __typename\n      ...assetFragment\n    }\n  }\n}",
            "typeCondition": "AssetsConnection",
            "fields": [
                {
                    "responseName": "edges",
                    "fieldName": "edges",
                    "type": "[AssetsEdge]",
                    "fields": [
                        {
                            "responseName": "node",
                            "fieldName": "node",
                            "type": "Asset",
                            "fields": [],
                            "fragmentSpreads": [
                                "assetFragment"
                            ],
                            "inlineFragments": []
                        }
                    ],
                    "fragmentSpreads": [],
                    "inlineFragments": []
                }
            ],
            "fragmentSpreads": [],
            "inlineFragments": [],
            "fragmentsReferenced": [
                "assetFragment"
            ]
        },
        {
            "filePath": "/Users/206847/apollo-android-copy/apollo-sample/src/main/graphql/com/example/foo.graphql",
            "fragmentName": "assetFragment",
            "source": "fragment assetFragment on Article {\n  __typename\n  promo_summary\n}",
            "typeCondition": "Article",
            "fields": [
                {
                    "responseName": "promo_summary",
                    "fieldName": "promo_summary",
                    "type": "String"
                }
            ],
            "fragmentSpreads": [],
            "inlineFragments": [],
            "fragmentsReferenced": []
        }
    ],
    "typesUsed": []
}