Frisbee/Tests/FrisbeeTests/Requestables/NetworkGetTests.swift at 540fe8d714ef9e1816a94c9ad2fe35d27cb305c7 · ronanrodrigo/Frisbee · GitHub

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import XCTest
@testable import Frisbee

final class NetworkGetTests: XCTestCase {

    private let invalidUrlString = "🤷‍♂️"
    private let validUrlString = "http://www.com.br"

    #if !os(Linux)

    func testGetWhenThrowsAnErrorAtQueryAdapterThenGenerateFailResult() {
        let session = MockURLSession(results: [.error(SomeError.some)])
        let urlQueryAdapter = URLWithQueryTrhrowErrorFakeBuildable()
        urlQueryAdapter.errorToThrow = .invalidEntity
        let query = Empty()
        let getter = NetworkGet(queryAdapter: urlQueryAdapter, urlSession: session)
        var generatedResult: Result<Empty>!

        let cancellabe = getter.get(url: validUrlString, query: query) { generatedResult = $0 }
        //run NillCancellable
        cancellabe.cancel()

        XCTAssertEqual(generatedResult.error, .invalidEntity)
        XCTAssertNil(generatedResult.data)
    }

    func testInitWithCustomUrlSessionThenKeepSameReferenceOfUrlSession() {
        let urlSession = URLSession(configuration: .default)
        let networkGetter = NetworkGet(urlSession: urlSession)

        XCTAssertEqual(urlSession, networkGetter.urlSession)
    }

    func testGetWhenURLStringIsInvalidFormatThenExecuteCompletionHandlerWithInvalidURLError() {
        var generatedResult: Result<Data?>!

        NetworkGet().get(url: invalidUrlString) { generatedResult = $0 }

        XCTAssertEqual(generatedResult, Result.fail(.invalidUrl))
    }

    func testGetWhenValidURLThenGenerateSuccessResult() {
        let session = MockURLSession(results: [.success(Empty.data, URLResponse())])
        let getter = NetworkGet(urlSession: session)
        var generatedResult: Result<Empty>!

        getter.get(url: validUrlString) { generatedResult = $0 }

        XCTAssertEqual(generatedResult.data, Empty())
        XCTAssertNil(generatedResult.error)
    }

    func testGetWhenValidURLWithoutBodyThenGenerateSuccessResult() {
        let session = MockURLSession(results: [.success(nil, URLResponse())])
        let getter = NetworkGet(urlSession: session)
        var generatedResult: Result<Empty>!

        getter.get(url: validUrlString) { generatedResult = $0 }

        XCTAssertNil(generatedResult.data)
        XCTAssertNil(generatedResult.error)
    }

    func testGetWhenInvalidURLThenGenerateFailResult() {
        let session = MockURLSession(results: [])
        let getter = NetworkGet(urlSession: session)
        var generatedResult: Result<Empty>!

        getter.get(url: invalidUrlString) { generatedResult = $0 }

        XCTAssertEqual(generatedResult.error, .invalidUrl)
        XCTAssertNil(generatedResult.data)
    }

    func testGetWithQueryWhenInvalidURLThenGenerateFailResult() {
        let session = MockURLSession(results: [])
        let getter = NetworkGet(urlSession: session)
        let query = Empty()
        var generatedResult: Result<Empty>!

        getter.get(url: invalidUrlString, query: query) { generatedResult = $0 }

        XCTAssertEqual(generatedResult.error, .invalidUrl)
        XCTAssertNil(generatedResult.data)
    }

    func testGetWhenValidURLAndRequestFailsThenGenerateFailResult() {
        let session = MockURLSession(results: [.error(SomeError.some)])
        let getter = NetworkGet(urlSession: session)
        var generatedResult: Result<Empty>!

        getter.get(url: validUrlString) { generatedResult = $0 }

        XCTAssertEqual(generatedResult.error, .other(localizedDescription: SomeError.some.localizedDescription))
        XCTAssertNil(generatedResult.data)
    }
    #endif

}