[Standing Unit Tests - MCT Article]

StandingUnitTests-MCT.swift

class StandingsEndpointLocalRequest: StandingsEndpointRequest {
	
    let tournamentId: Int32
    let file: String

    init(file: String, tournamentId: Int32) {
        self.file = file
        self.tournamentId = tournamentId
    }

    override func urlRequest() -> URLRequest {
        let file = Bundle(for: StandingsEndpointLocalRequest.self).url(forResource: self.file, withExtension: "json")
        return URLRequest(url: file!)
    }
}

class StandingsDatasourceTests: XCTestCase {

    func testParsing() {
        // Given
        let datasource = self.testDatasourceFetchStandings()

        // When
        UtilitiesForTest.requestAndWaitSuccess(test: self, dataSource: datasource)
        let standings = datasource.fetchedResultsController?.fetchedObjects as? [Standing]

        // Then
        XCTAssertNotNil(standings)
        XCTAssertEqual(standings!.count, 3, "There should be 3 standings")
    }

    func testDuplicating() {
        // Given
        let datasource = self.testDatasourceFetchStandings()

        // When
        UtilitiesForTest.requestAndWaitSuccess(test: self, dataSource: datasource)
        UtilitiesForTest.requestAndWaitSuccess(test: self, dataSource: datasource)
       	let standings = datasource.fetchedResultsController?.fetchedObjects as? [Standing]

        // Then
        XCTAssertEqual(standings!.count, 3, "There should be 3 standings")
    }
  
  
    func testGroupFiltering() {
         // Given
         let datasource = self.testDatasourceFetchStandings(groupName: "Group B")

         // When
         UtilitiesForTest.requestAndWaitSuccess(test: self, dataSource: datasource)
     	 let standings = datasource.fetchedResultsController?.fetchedObjects as? [Standing]

         // Then
         XCTAssertEqual(standings!.count, 2, "There should be 2 standings for `Group B`")
     }
}

extension StandingsDatasourceTests {
    private func testDatasourceFetchStandings(
        file: String = "tournamentStandingsSample.json",
        tournamentId: Int32 = 10,
        groupName: String? = nil) -> StandingsDatasource {

        let memoryCDC = MemoryCoreDataController()
        let dataController = MemoryRequestDataConnectionController(manage:memoryCDC.mainManagedObjectContext)

        let entityRequest = StandingsEntityRequest(tournamentId: tournamentId, groupName: groupName)
        let endpointRequest = StandingsEndpointLocalRequest(file: file, tournamentId: tournamentId)
        
      	return StandingsDatasource(
          	endpointRequest: endpointRequest,
         	entityRequest: entityRequest,
            managedObjectContext: memoryCDC.mainManagedObjectContext,
            dataController: dataController
        )
    }
}