Alamofire/Tests/ResponseSerializationTests.swift

// ResponseSerializationTests.swift
//
// Copyright (c) 2014–2015 Alamofire Software Foundation (http://alamofire.org/)
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

import Alamofire
import Foundation
import XCTest

class ResponseSerializationTestCase: BaseTestCase {

    // MARK: - Data Response Serializer Tests

    func testThatDataResponseSerializerSucceedsWhenDataIsNotNil() {
        // Given
        let serializer = Request.dataResponseSerializer()
        let data = "data".dataUsingEncoding(NSUTF8StringEncoding)!

        // When
        let result = serializer.serializeResponse(nil, nil, data)

        // Then
        XCTAssertTrue(result.isSuccess, "result is success should be true")
        XCTAssertNotNil(result.value, "result value should not be nil")
        XCTAssertNil(result.data, "result data should be nil")
        XCTAssertNil(result.error, "result error should be nil")
    }

    func testThatDataResponseSerializerFailsWhenDataIsNil() {
        // Given
        let serializer = Request.dataResponseSerializer()

        // When
        let result = serializer.serializeResponse(nil, nil, nil)

        // Then
        XCTAssertTrue(result.isFailure, "result is failure should be true")
        XCTAssertNil(result.value, "result value should be nil")
        XCTAssertNil(result.data, "result data should be nil")
        XCTAssertNotNil(result.error, "result error should not be nil")

        if let error = result.error {
            XCTAssertEqual(error.domain, Error.Domain, "error domain should match expected value")
            XCTAssertEqual(error.code, Error.Code.DataSerializationFailed.rawValue, "error code should match expected value")
        } else {
            XCTFail("error should not be nil")
        }
    }

    // MARK: - String Response Serializer Tests

    func testThatStringResponseSerializerFailsWhenDataIsNil() {
        // Given
        let serializer = Request.stringResponseSerializer()

        // When
        let result = serializer.serializeResponse(nil, nil, nil)

        // Then
        XCTAssertTrue(result.isFailure, "result is failure should be true")
        XCTAssertNil(result.value, "result value should be nil")
        XCTAssertNil(result.data, "result data should be nil")
        XCTAssertNotNil(result.error, "result error should not be nil")

        if let error = result.error {
            XCTAssertEqual(error.domain, Error.Domain, "error domain should match expected value")
            XCTAssertEqual(error.code, Error.Code.StringSerializationFailed.rawValue, "error code should match expected value")
        } else {
            XCTFail("error should not be nil")
        }
    }

    func testThatStringResponseSerializerSucceedsWhenDataIsEmpty() {
        // Given
        let serializer = Request.stringResponseSerializer()

        // When
        let result = serializer.serializeResponse(nil, nil, NSData())

        // Then
        XCTAssertTrue(result.isSuccess, "result is success should be true")
        XCTAssertNotNil(result.value, "result value should not be nil")
        XCTAssertNil(result.data, "result data should be nil")
        XCTAssertNil(result.error, "result error should be nil")
    }

    func testThatStringResponseSerializerSucceedsWithUTF8DataAndNoProvidedEncoding() {
        let serializer = Request.stringResponseSerializer()
        let data = "data".dataUsingEncoding(NSUTF8StringEncoding)!

        // When
        let result = serializer.serializeResponse(nil, nil, data)

        // Then
        XCTAssertTrue(result.isSuccess, "result is success should be true")
        XCTAssertNotNil(result.value, "result value should not be nil")
        XCTAssertNil(result.data, "result data should be nil")
        XCTAssertNil(result.error, "result error should be nil")
    }

    func testThatStringResponseSerializerSucceedsWithUTF8DataAndUTF8ProvidedEncoding() {
        let serializer = Request.stringResponseSerializer(encoding: NSUTF8StringEncoding)
        let data = "data".dataUsingEncoding(NSUTF8StringEncoding)!

        // When
        let result = serializer.serializeResponse(nil, nil, data)

        // Then
        XCTAssertTrue(result.isSuccess, "result is success should be true")
        XCTAssertNotNil(result.value, "result value should not be nil")
        XCTAssertNil(result.data, "result data should be nil")
        XCTAssertNil(result.error, "result error should be nil")
    }

    func testThatStringResponseSerializerSucceedsWithUTF8DataUsingResponseTextEncodingName() {
        let serializer = Request.stringResponseSerializer()
        let data = "data".dataUsingEncoding(NSUTF8StringEncoding)!
        let response = NSHTTPURLResponse(
            URL: NSURL(string: "https://httpbin.org/get")!,
            statusCode: 200,
            HTTPVersion: "HTTP/1.1",
            headerFields: ["Content-Type": "image/jpeg; charset=utf-8"]
        )

        // When
        let result = serializer.serializeResponse(nil, response, data)

        // Then
        XCTAssertTrue(result.isSuccess, "result is success should be true")
        XCTAssertNotNil(result.value, "result value should not be nil")
        XCTAssertNil(result.data, "result data should be nil")
        XCTAssertNil(result.error, "result error should be nil")
    }

    func testThatStringResponseSerializerFailsWithUTF32DataAndUTF8ProvidedEncoding() {
        // Given
        let serializer = Request.stringResponseSerializer(encoding: NSUTF8StringEncoding)
        let data = "random data".dataUsingEncoding(NSUTF32StringEncoding)!

        // When
        let result = serializer.serializeResponse(nil, nil, data)

        // Then
        XCTAssertTrue(result.isFailure, "result is failure should be true")
        XCTAssertNil(result.value, "result value should be nil")
        XCTAssertNotNil(result.data, "result data should not be nil")
        XCTAssertNotNil(result.error, "result error should not be nil")

        if let error = result.error {
            XCTAssertEqual(error.domain, Error.Domain, "error domain should match expected value")
            XCTAssertEqual(error.code, Error.Code.StringSerializationFailed.rawValue, "error code should match expected value")
        } else {
            XCTFail("error should not be nil")
        }
    }

    func testThatStringResponseSerializerFailsWithUTF32DataAndUTF8ResponseEncoding() {
        // Given
        let serializer = Request.stringResponseSerializer()
        let data = "random data".dataUsingEncoding(NSUTF32StringEncoding)!
        let response = NSHTTPURLResponse(
            URL: NSURL(string: "https://httpbin.org/get")!,
            statusCode: 200,
            HTTPVersion: "HTTP/1.1",
            headerFields: ["Content-Type": "image/jpeg; charset=utf-8"]
        )

        // When
        let result = serializer.serializeResponse(nil, response, data)

        // Then
        XCTAssertTrue(result.isFailure, "result is failure should be true")
        XCTAssertNil(result.value, "result value should be nil")
        XCTAssertNotNil(result.data, "result data should not be nil")
        XCTAssertNotNil(result.error, "result error should not be nil")

        if let error = result.error {
            XCTAssertEqual(error.domain, Error.Domain, "error domain should match expected value")
            XCTAssertEqual(error.code, Error.Code.StringSerializationFailed.rawValue, "error code should match expected value")
        } else {
            XCTFail("error should not be nil")
        }
    }

    // MARK: - JSON Response Serializer Tests

    func testThatJSONResponseSerializerFailsWhenDataIsNil() {
        // Given
        let serializer = Request.JSONResponseSerializer()

        // When
        let result = serializer.serializeResponse(nil, nil, nil)

        // Then
        XCTAssertTrue(result.isFailure, "result is failure should be true")
        XCTAssertNil(result.value, "result value should be nil")
        XCTAssertNil(result.data, "result data should be nil")
        XCTAssertNotNil(result.error, "result error should not be nil")

        if let error = result.error {
            XCTAssertEqual(error.domain, Error.Domain, "error domain should match expected value")
            XCTAssertEqual(error.code, Error.Code.JSONSerializationFailed.rawValue, "error code should match expected value")
        } else {
            XCTFail("error should not be nil")
        }
    }

    func testThatJSONResponseSerializerFailsWhenDataIsEmpty() {
        // Given
        let serializer = Request.JSONResponseSerializer()

        // When
        let result = serializer.serializeResponse(nil, nil, NSData())

        // Then
        XCTAssertTrue(result.isFailure, "result is failure should be true")
        XCTAssertNil(result.value, "result value should be nil")
        XCTAssertNotNil(result.data, "result data should not be nil")
        XCTAssertNotNil(result.error, "result error should not be nil")

        if let error = result.error {
            XCTAssertEqual(error.domain, NSCocoaErrorDomain, "error domain should match expected value")
            XCTAssertEqual(error.code, 3840, "error code should match expected value")
        } else {
            XCTFail("error should not be nil")
        }
    }

    func testThatJSONResponseSerializerSucceedsWhenDataIsValidJSON() {
        // Given
        let serializer = Request.stringResponseSerializer()
        let data = "{\"json\": true}".dataUsingEncoding(NSUTF8StringEncoding)!

        // When
        let result = serializer.serializeResponse(nil, nil, data)

        // Then
        XCTAssertTrue(result.isSuccess, "result is success should be true")
        XCTAssertNotNil(result.value, "result value should not be nil")
        XCTAssertNil(result.data, "result data should be nil")
        XCTAssertNil(result.error, "result error should be nil")
    }

    func testThatJSONResponseSerializerFailsWhenDataIsInvalidJSON() {
        // Given
        let serializer = Request.JSONResponseSerializer()
        let data = "definitely not valid json".dataUsingEncoding(NSUTF8StringEncoding)!

        // When
        let result = serializer.serializeResponse(nil, nil, data)

        // Then
        XCTAssertTrue(result.isFailure, "result is failure should be true")
        XCTAssertNil(result.value, "result value should be nil")
        XCTAssertNotNil(result.data, "result data should not be nil")
        XCTAssertNotNil(result.error, "result error should not be nil")

        if let error = result.error {
            XCTAssertEqual(error.domain, NSCocoaErrorDomain, "error domain should match expected value")
            XCTAssertEqual(error.code, 3840, "error code should match expected value")
        } else {
            XCTFail("error should not be nil")
        }
    }

    // MARK: - Property List Response Serializer Tests

    func testThatPropertyListResponseSerializerFailsWhenDataIsNil() {
        // Given
        let serializer = Request.propertyListResponseSerializer()

        // When
        let result = serializer.serializeResponse(nil, nil, nil)

        // Then
        XCTAssertTrue(result.isFailure, "result is failure should be true")
        XCTAssertNil(result.value, "result value should be nil")
        XCTAssertNil(result.data, "result data should be nil")
        XCTAssertNotNil(result.error, "result error should not be nil")

        if let error = result.error {
            XCTAssertEqual(error.domain, Error.Domain, "error domain should match expected value")
            XCTAssertEqual(error.code, Error.Code.PropertyListSerializationFailed.rawValue, "error code should match expected value")
        } else {
            XCTFail("error should not be nil")
        }
    }

    func testThatPropertyListResponseSerializerFailsWhenDataIsEmpty() {
        // Given
        let serializer = Request.propertyListResponseSerializer()

        // When
        let result = serializer.serializeResponse(nil, nil, NSData())

        // Then
        XCTAssertTrue(result.isFailure, "result is failure should be true")
        XCTAssertNil(result.value, "result value should be nil")
        XCTAssertNotNil(result.data, "result data should not be nil")
        XCTAssertNotNil(result.error, "result error should not be nil")

        if let error = result.error {
            XCTAssertEqual(error.domain, NSCocoaErrorDomain, "error domain should match expected value")
            XCTAssertEqual(error.code, 3840, "error code should match expected value")
        } else {
            XCTFail("error should not be nil")
        }
    }

    func testThatPropertyListResponseSerializerSucceedsWhenDataIsValidPropertyListData() {
        // Given
        let serializer = Request.propertyListResponseSerializer()
        let data = NSKeyedArchiver.archivedDataWithRootObject(["foo": "bar"])

        // When
        let result = serializer.serializeResponse(nil, nil, data)

        // Then
        XCTAssertTrue(result.isSuccess, "result is success should be true")
        XCTAssertNotNil(result.value, "result value should not be nil")
        XCTAssertNil(result.data, "result data should be nil")
        XCTAssertNil(result.error, "result error should be nil")
    }

    func testThatPropertyListResponseSerializerFailsWhenDataIsInvalidPropertyListData() {
        // Given
        let serializer = Request.JSONResponseSerializer()
        let data = "definitely not valid plist data".dataUsingEncoding(NSUTF8StringEncoding)!

        // When
        let result = serializer.serializeResponse(nil, nil, data)

        // Then
        XCTAssertTrue(result.isFailure, "result is failure should be true")
        XCTAssertNil(result.value, "result value should be nil")
        XCTAssertNotNil(result.data, "result data should not be nil")
        XCTAssertNotNil(result.error, "result error should not be nil")

        if let error = result.error {
            XCTAssertEqual(error.domain, NSCocoaErrorDomain, "error domain should match expected value")
            XCTAssertEqual(error.code, 3840, "error code should match expected value")
        } else {
            XCTFail("error should not be nil")
        }
    }
}