func testWatchedQueryDoesNotRefetchAfterUnrelatedQuery()

in ApolloTests/WatchQueryTests.swift [133:193]
50 lines of code
1 McCabe index (conditional complexity)

  func testWatchedQueryDoesNotRefetchAfterUnrelatedQuery() throws {
    let initialRecords: RecordSet = [
      "QUERY_ROOT": ["hero": Reference(key: "QUERY_ROOT.hero")],
      "QUERY_ROOT.hero": [
        "name": "R2-D2",
        "__typename": "Droid",
        "friends": [
          Reference(key: "QUERY_ROOT.hero.friends.0"),
          Reference(key: "QUERY_ROOT.hero.friends.1"),
          Reference(key: "QUERY_ROOT.hero.friends.2")
        ]
      ],
      "QUERY_ROOT.hero.friends.0": ["__typename": "Human", "name": "Luke Skywalker"],
      "QUERY_ROOT.hero.friends.1": ["__typename": "Human", "name": "Han Solo"],
      "QUERY_ROOT.hero.friends.2": ["__typename": "Human", "name": "Leia Organa"],
      ]

    withCache(initialRecords: initialRecords) { (cache) in
      let networkTransport = MockNetworkTransport(body: [
        "data": [
          "hero": [
            "name": "Artoo",
            "__typename": "Droid"
          ]
        ]
        ])
      let store = ApolloStore(cache: cache)
      let client = ApolloClient(networkTransport: networkTransport, store: store)

      let query = HeroAndFriendsNamesQuery()

      var verifyResult: OperationResultHandler<HeroAndFriendsNamesQuery>

      verifyResult = { (result, error) in
        XCTAssertNil(error)
        XCTAssertNil(result?.errors)

        guard let data = result?.data else { XCTFail(); return }
        XCTAssertEqual(data.hero?.name, "R2-D2")
        let friendsNames = data.hero?.friends?.compactMap { $0?.name }
        XCTAssertEqual(friendsNames, ["Luke Skywalker", "Han Solo", "Leia Organa"])
      }

      let expectation = self.expectation(description: "Fetching query")

      _ = client.watch(query: query) { (result, error) in
        verifyResult(result, error)
        expectation.fulfill()
      }

      waitForExpectations(timeout: 5, handler: nil)

      verifyResult = { (result, error) in
        XCTFail()
      }

      client.fetch(query: HeroNameQuery(episode: .empire), cachePolicy: .fetchIgnoringCacheData)
      
      waitFor(timeInterval: 1.0)
    }
  }