差异 1.0.2

差异 1.0.2

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由 Krzysztof Zabłocki，Ben Henshall 维护。

差异 1.0.2

  • 由
  • Krzysztof Zablocki

Version License Platform

Difference

更好的方法来识别两个实例之间的差异。

你写过测试吗？通常它们使用等式断言，例如 XCTAssertEqual，如果对象不相等会发生什么？Xcode 会向你展示一屏的文字

这迫使你手动扫描文本并试图找出确切的问题，如果你可以只了解哪个属性不同呢？

安装

CocoaPods

将 pod 'Difference' 添加到您的 Podfile。

Carthage

将 github "krzysztofzablocki/Difference" 添加到您的 Cartfile。

SwiftPM

在您的Package manifest文件中添加以下依赖项：.package(name: "Difference", url: "https://github.com/krzysztofzablocki/Difference.git", .branch("master"))

使用lldb

输入以下命令以查看两个实例之间的差异：

po dumpDiff(expected, received)

与XCTest集成

将其添加到您的测试目标中

public func XCTAssertEqual<T: Equatable>(_ expected: @autoclosure () throws -> T, _ received: @autoclosure () throws -> T, file: StaticString = #filePath, line: UInt = #line) {
    do {
        let expected = try expected()
        let received = try received()
        XCTAssertTrue(expected == received, "Found difference for \n" + diff(expected, received).joined(separator: ", "), file: file, line: line)
    }
    catch {
        XCTFail("Caught error while testing: \(error)", file: file, line: line)
    }
}

如果您使用的是Xcode 11或更早的版本，将#filePath替换为#file。

与Quick集成

将其添加到您的测试目标中

public func equalDiff<T: Equatable>(_ expectedValue: T?) -> Predicate<T> {
    return Predicate.define { actualExpression in
        let receivedValue = try actualExpression.evaluate()

        if receivedValue == nil {
            var message = ExpectationMessage.fail("")
            if let expectedValue = expectedValue {
                message = ExpectationMessage.expectedCustomValueTo("equal <\(expectedValue)>", actual: "nil")
            }
            return PredicateResult(status: .fail, message: message)
        }
        if expectedValue == nil {
            return PredicateResult(status: .fail, message: ExpectationMessage.fail("").appendedBeNilHint())
        }

        return PredicateResult(bool: receivedValue == expectedValue, message: ExpectationMessage.fail("Found difference for " + diff(expectedValue, receivedValue).joined(separator: ", ")))
    }
}

编写以下代码以查看两个实例之间的差异：expect(received).to(equalDiff(expected))

与组合架构集成

如果您正在使用组合架构的nameLabels配置以获取更适合减少器仪表化的差异，则可以使用此功能

diff(oldState, newState, indentationType: .pipe, nameLabels: .comparing)

您可以在基于以下代码的自己的ReducerInstrumentation变体中使用此函数：ReducerInstrumentation code based on this

这样，您的差异将类似于以下内容

Received action:
  AppAction.home(.howTo(.setSelectedSlide))
State:
home:
|	selectedHowTo:
|	|	selectedSlide:
|	|	|	Current: 8mnkni91h4fe
|	|	|	Previous: exei4wpqsmdk