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How to use ExpectationGroup class

Best Mockingbird code snippet using ExpectationGroup

OrderedVerification.swift

Source:OrderedVerification.swift

...149      baseInvocation: capturedExpectation.invocation,150      unexpectedInvocations: unexpectedInvocations,151      priorToBase: true152    )153    throw ExpectationGroup.Failure(error: failure,154                                   sourceLocation: capturedExpectation.expectation.sourceLocation)155  }156}157private func assertNoInvocationsAfter(_ capturedExpectation: CapturedExpectation,158                                      baseInvocation: Invocation?,159                                      contexts: [UUID: MockingContext]) throws {160  let allInvocations = getAllInvocations(in: contexts, after: baseInvocation)161  guard !allInvocations.isEmpty else { return }162  163  let failure = TestFailure.unexpectedInvocations(164    baseInvocation: capturedExpectation.invocation,165    unexpectedInvocations: allInvocations,166    priorToBase: false167  )168  throw ExpectationGroup.Failure(error: failure,169                                 sourceLocation: capturedExpectation.expectation.sourceLocation)170}171private struct Solution {172  let firstInvocation: Invocation?173  let lastInvocation: Invocation?174  175  enum Failure: Error {176    case unsatisfiable177  }178}179private func satisfy(_ capturedExpectations: [CapturedExpectation],180                     at index: Int = 0,181                     baseInvocation: Invocation? = nil,182                     contexts: [UUID: MockingContext],183                     options: OrderedVerificationOptions) throws -> Solution {184  let capturedExpectation = capturedExpectations[index]185  let allInvocations = findInvocations(in: capturedExpectation.mockingContext,186                                       with: capturedExpectation.invocation.selectorName,187                                       before: nil,188                                       after: baseInvocation)189  var nextInvocationIndex = 1190  191  while true {192    if options.contains(.onlyConsecutiveInvocations), baseInvocation != nil {193      try assertNoInvocationsBefore(capturedExpectation,194                                    baseInvocation: baseInvocation,195                                    contexts: contexts)196    }197    do {198      // Try to satisfy the current expectations.199      let allInvocations = try expect(capturedExpectation.mockingContext,200                                      handled: capturedExpectation.invocation,201                                      using: capturedExpectation.expectation,202                                      before: allInvocations.get(nextInvocationIndex),203                                      after: baseInvocation)204      guard index+1 < capturedExpectations.count else { // Found a solution!205        return Solution(firstInvocation: allInvocations.first, lastInvocation: allInvocations.last)206      }207      208      // Potential match with the current base invocation, try satisfying the next expectation.209      let allMatchingInvocations = allInvocations.filter({ $0.isEqual(to: capturedExpectation.invocation) })210      let result = try satisfy(capturedExpectations,211                               at: index+1,212                               baseInvocation: allMatchingInvocations.first,213                               contexts: contexts,214                               options: options)215      216      // Check if still satisfiable when using the next invocation as a constraint.217      if let nextBaseInvocation = result.firstInvocation {218        try expect(capturedExpectation.mockingContext,219                   handled: capturedExpectation.invocation,220                   using: capturedExpectation.expectation,221                   before: nextBaseInvocation,222                   after: baseInvocation)223      }224      225      return Solution(firstInvocation: allInvocations.first, lastInvocation: result.lastInvocation)226    } catch let error as ExpectationGroup.Failure { // Propagate the precondition failure.227      throw error228    } catch { // Unable to satisfy the current expectation.229      guard nextInvocationIndex+1 <= allInvocations.count else {230        throw Solution.Failure.unsatisfiable // Unable to grow the window further.231      }232      nextInvocationIndex += 1 // Grow the invocation window.233    }234  }235}236/// Internal helper for `inOrder` verification scopes.237///   1. Creates an attributed `DispatchQueue` scope which collects all verifications.238///   2. Checks invocations on each mock using the provided `options`.239func createOrderedContext(at sourceLocation: SourceLocation,240                          options: OrderedVerificationOptions,241                          block scope: () -> Void) {242  let group = ExpectationGroup { group in243    let contexts = group.expectations.reduce(into: [UUID: MockingContext]()) {244      (result, expectation) in245      result[expectation.mockingContext.identifier] = expectation.mockingContext246    }247    248    // Check for invocations prior to the first expectation's invocation(s).249    if options.contains(.noInvocationsBefore), let firstExpectation = group.expectations.first {250      try assertNoInvocationsBefore(firstExpectation, baseInvocation: nil, contexts: contexts)251    }252    253    do {254      let result = try satisfy(group.expectations, contexts: contexts, options: options)255      256      // Check for invocations after the last expectation's invocation(s).257      if options.contains(.noInvocationsAfter), let lastExpectation = group.expectations.last {258        try assertNoInvocationsAfter(lastExpectation,259                                     baseInvocation: result.lastInvocation,260                                     contexts: contexts)261      }262    } catch let error as ExpectationGroup.Failure {263      throw error // Propagate wrapped precondition error.264    } catch _ as Solution.Failure {265      // It's difficult to clearly determine which expectation is breaking the group, so instead266      // just throw an error at the group level instead.267      let allInvocations = getAllInvocations(in: contexts, after: nil)268      let failure = TestFailure.unsatisfiableExpectations(capturedExpectations: group.expectations,269                                                          allInvocations: allInvocations)270      throw ExpectationGroup.Failure(error: failure, sourceLocation: sourceLocation)271    } catch {272      fatalError("Unexpected error type") // This shouldn't happen.273    }274  }275  276  let queue = DispatchQueue(label: "co.bird.mockingbird.verify.inOrder")277  queue.setSpecific(key: ExpectationGroup.contextKey, value: group)278  queue.sync { scope() }279  280  do {281    try group.verify()282  } catch let error as ExpectationGroup.Failure {283    FailTest(String(describing: error),284             file: error.sourceLocation.file,285             line: error.sourceLocation.line)286  } catch {287    fatalError("Unexpected error type") // This shouldn't happen.288  }289}...

ExpectationGroup.swift

Source:ExpectationGroup.swift

1//2//  ExpectationGroup.swift3//  MockingbirdFramework4//5//  Created by Andrew Chang on 5/31/20.6//7import Foundation8/// A deferred expectation that can be fulfilled when an invocation arrives later.9struct CapturedExpectation {10  let mockingContext: MockingContext11  let invocation: Invocation12  let expectation: Expectation13}14/// Stores all expectations invoked by verification methods within a scoped context.15class ExpectationGroup {16  static let contextKey = DispatchSpecificKey<ExpectationGroup>()17  18  private(set) weak var parent: ExpectationGroup?19  private let verificationBlock: (ExpectationGroup) throws -> Void20  21  init(_ verificationBlock: @escaping (ExpectationGroup) throws -> Void) {22    self.parent = DispatchQueue.currentExpectationGroup23    self.verificationBlock = verificationBlock24  }25  26  struct Failure: Error {27    let error: TestFailure28    let sourceLocation: SourceLocation29  }30  func verify(context: ExpectationGroup? = nil) throws {31    if let parent = parent, context == nil {32      parent.addSubgroup(self)33    } else {34      try verificationBlock(self)35    }36  }37  38  private(set) var expectations = [CapturedExpectation]()39  func addExpectation(mockingContext: MockingContext,40                      invocation: Invocation,41                      expectation: Expectation) {42    expectations.append(CapturedExpectation(mockingContext: mockingContext,43                                            invocation: invocation,44                                            expectation: expectation))45  }46  47  private(set) var subgroups = [ExpectationGroup]()48  func addSubgroup(_ subgroup: ExpectationGroup) {49    subgroups.append(subgroup)50  }51}52extension DispatchQueue {53  class var currentExpectationGroup: ExpectationGroup? {54    return DispatchQueue.getSpecific(key: ExpectationGroup.contextKey)55  }56}...

ExpectationGroup

Using AI Code Generation

1import Mockingbird2import XCTest3class ExpectationGroupTests: XCTestCase {4    override func setUp() {5        super.setUp()6        expectationGroup = ExpectationGroup()7    }8    func testExpectationGroup() {9        let order = expectationGroup.expectation("order")10        let payment = expectationGroup.expectation("payment")11        let delivery = expectationGroup.expectation("delivery")12        expectationGroup.notify(on: DispatchQueue.main) {13            print("All tasks done")14        }15        DispatchQueue.main.asyncAfter(deadline: .now() + 0.1) {16            order.fulfill()17        }18        DispatchQueue.main.asyncAfter(deadline: .now() + 0.2) {19            payment.fulfill()20        }21        DispatchQueue.main.asyncAfter(deadline: .now() + 0.3) {22            delivery.fulfill()23        }24        wait(for: [expectationGroup.expectation], timeout: 1)25    }26}27import Mockingbird28import XCTest29class ExpectationGroupTests: XCTestCase {30    override func setUp() {31        super.setUp()32        expectationGroup = ExpectationGroup()33    }34    func testExpectationGroup() {35        let order = expectationGroup.expectation("order")36        let payment = expectationGroup.expectation("payment")37        let delivery = expectationGroup.expectation("delivery")38        expectationGroup.notify(on: DispatchQueue.main) {39            print("All tasks done")40        }41        DispatchQueue.main.asyncAfter(deadline: .now() + 0.1) {42            order.fulfill()43        }44        DispatchQueue.main.asyncAfter(deadline: .now() + 0.2) {45            payment.fulfill()46        }47        DispatchQueue.main.asyncAfter(deadline: .now() + 0.3) {48            delivery.fulfill()49        }50        wait(for: [expectationGroup.expectation], timeout: 1)51    }52}

ExpectationGroup

Using AI Code Generation

1import Mockingbird2let expectationGroup = ExpectationGroup()3let expectation = expectationGroup.createExpectation()4let expectationGroup = XCTestExpectation(description: "test")5let expectation = expectationGroup.expectation(description: "test")6import Mockingbird7let expectationGroup = ExpectationGroup()8let expectation = expectationGroup.createExpectation()9let expectationGroup = XCTestExpectation(description: "test")10let expectation = expectationGroup.expectation(description: "test")11import Mockingbird12let expectationGroup = ExpectationGroup()13let expectation = expectationGroup.createExpectation()14let expectationGroup = XCTestExpectation(description: "test")15let expectation = expectationGroup.expectation(description: "test")16import Mockingbird17let expectationGroup = ExpectationGroup()18let expectation = expectationGroup.createExpectation()19let expectationGroup = XCTestExpectation(description: "test")20let expectation = expectationGroup.expectation(description: "test")21import Mockingbird22let expectationGroup = ExpectationGroup()23let expectation = expectationGroup.createExpectation()24let expectationGroup = XCTestExpectation(description: "test")25let expectation = expectationGroup.expectation(description: "test")26import Mockingbird27let expectationGroup = ExpectationGroup()28let expectation = expectationGroup.createExpectation()29let expectationGroup = XCTestExpectation(description: "test")30let expectation = expectationGroup.expectation(description: "test")31import Mockingbird32let expectationGroup = ExpectationGroup()33let expectation = expectationGroup.createExpectation()

ExpectationGroup

Using AI Code Generation

1import Mockingbird2let group = ExpectationGroup()3let mock = mock(MyProtocol.self, named: "mock", in: group)4when(mock.method()).thenDoNothing()5verify(mock.method()).wasCalled(in: group)6import Mockingbird7let mock = mock(MyProtocol.self)8when(mock.method()).thenDoNothing()9when(mock.method()).thenThrow(MyError())10when(mock.method()).thenReturn("value")11when(mock.method()).then { _ in "value" }12when(mock.method()).thenCallRealImplementation()13##### `thenDoNothing()`14import Mockingbird15let mock = mock(MyProtocol.self)16when(mock.method()).thenDoNothing()17##### `thenThrow(_:)`18import Mockingbird19let mock = mock(MyProtocol.self)20when(mock.method()).thenThrow(MyError())21##### `thenReturn(_:)`22import Mockingbird23let mock = mock(MyProtocol.self)24when(mock.method()).thenReturn("value")25##### `then(_:)`26import Mocking

ExpectationGroup

Using AI Code Generation

1import XCTest2import Mockingbird3import MockingbirdXCTest4import MyFramework5class ExpectationGroupTest: XCTestCase {6    func testExpectationGroup() {7        let mockMyFramework = mock(MyFramework.self)8        let myExpectationGroup = ExpectationGroup()9        myExpectationGroup.setExpectation()10        given(mockMyFramework.myFunction()) ~> { _ in11            myExpectationGroup.wait()12        }13        XCTAssertEqual(myFramework.myFunction(), "myFunction")14        myExpectationGroup.verify()15        myExpectationGroup.setExpectation()16        given(mockMyFramework.myFunction()) ~> { _ in17            myExpectationGroup.wait()18        }19        XCTAssertEqual(myFramework.myFunction(), "myFunction")20        myExpectationGroup.verify()21    }22}

ExpectationGroup

Using AI Code Generation

1import XCTest2import Mockingbird3@testable import MockingbirdTestsHost4class ExpectationGroupTests: XCTestCase {5  override func setUp() {6    super.setUp()7    mock = mock(ExpectationGroupProtocol.self)8    group = ExpectationGroup()9    expectation = XCTestExpectation(description: "ExpectationGroupTests")10  }11  override func tearDown() {12    super.tearDown()13  }14  func testExpectationGroup() {15    let expectation1 = group.expectation(description: "Expectation 1")16    let expectation2 = group.expectation(description: "Expectation 2")17    let expectation3 = group.expectation(description: "Expectation 3")18    given(mock.doSomethingWithCompletionHandler(any())) ~> { (completion: @escaping () -> Void) in19      completion()20    }21    mock.doSomethingWithCompletionHandler {22      self.group.notify {23        XCTAssertTrue(self.group.isFulfilled)24        expectation1.fulfill()25        expectation2.fulfill()26        expectation3.fulfill()27      }28    }29    wait(for: [expectation1, expectation2, expectation3], timeout: 1)30  }31}

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