Swift Mock Generator Xcode Extension

A simple Xcode extension for generate mock class.

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How does it work

MockGen parse string source code and generate mock. Mostly thanks SwiftSemantics and SwiftSyntax MockGen works with Xcode alert. You should first tap fix button when Xcode say Type 'XClass' does not conform to protocol 'XProtocol'. Then run extension. Extension reads your current file and generate mock. MockGen doesn't need to read your entire project.

Installation

• Download MockGen
• Move MockGen to Applications folder
• Open System Preferences
• Open Extensions and Xcode Source Editor. Activate MockGen

Features

• Spy mock generation
• Simple and fast
• No need access all files
• Powered by Apples open source SwiftSyntax and other.

Cons

• MockGen can't determinate variables accessors. All variables generate mocks with get set accessors.

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ProductProtocol

protocol ProductProtocol {
    var name: String { get }
    var favoriteStatus: String { get set }

    func openImages()
    func description() -> String
    func addToBasket(completion: (Bool) -> Void)
}

Xcode fixed MockProduct

final class MockProduct: ProductProtocol {
    var name: String

    var favoriteStatus: String

    func openImages() {
        <#code#>
    }

    func description() -> String {
        <#code#>
    }

    func addToBasket(completion: (Bool) -> Void) {
        <#code#>
    }
}

MockGen generated mock

final class MockProduct: ProductProtocol {
    var invokedNameSetter = false
    var invokedNameSetterCount = 0
    var invokedName: String?
    var invokedNameList: [String] = []
    var invokedNameGetter = false
    var invokedNameGetterCount = 0
    var stubbedName: String!
    var name: String {
        set {
            invokedNameSetter = true
            invokedNameSetterCount += 1
            invokedName = newValue
            invokedNameList.append(newValue)
        }
        get {
            invokedNameGetter = true
            invokedNameGetterCount += 1
            return stubbedName
        }
    }

    var invokedFavoriteStatusSetter = false
    var invokedFavoriteStatusSetterCount = 0
    var invokedFavoriteStatus: String?
    var invokedFavoriteStatusList: [String] = []
    var invokedFavoriteStatusGetter = false
    var invokedFavoriteStatusGetterCount = 0
    var stubbedFavoriteStatus: String!
    var favoriteStatus: String {
        set {
            invokedFavoriteStatusSetter = true
            invokedFavoriteStatusSetterCount += 1
            invokedFavoriteStatus = newValue
            invokedFavoriteStatusList.append(newValue)
        }
        get {
            invokedFavoriteStatusGetter = true
            invokedFavoriteStatusGetterCount += 1
            return stubbedFavoriteStatus
        }
    }

    var invokedOpenImages = false
    var invokedOpenImagesCount = 0
    func openImages() {
        invokedOpenImages = true
        invokedOpenImagesCount += 1
    }

    var invokedDescription = false
    var invokedDescriptionCount = 0
    var stubbedDescriptionResult: String!
    func description() -> String {
        invokedDescription = true
        invokedDescriptionCount += 1
        return stubbedDescriptionResult
    }

    var invokedAddToBasket = false
    var invokedAddToBasketCount = 0
    var stubbedAddToBasketCompletionResult: (Bool, Void)?
    func addToBasket(completion: (Bool) -> Void) {
        invokedAddToBasket = true
        invokedAddToBasketCount += 1
        if let result = stubbedAddToBasketCompletionResult {
            _ = completion(result.0)
        }
    }
}

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Similar Projects

• SwiftMockGeneratorForXcode
• Rubicon
• Parrot
• mockolo

Credits

• SwiftSemantics - Forked and updated SwiftSemantics
• SwiftSyntax
• swift-format