Question

尝试对网络电话进行单元测试并收到以下错误：

API violation - multiple calls made to -[XCTestExpectation fulfill]

如果之前写过这种风格的测试，但这个似乎是在创建错误而我似乎无法弄清楚为什么。

func testAccessKeys() {
    let expected = expectation(description: "Run the Access request")
    sut.request(.Access, data: nil) { finished, response in
        if response != nil && finished == true {
            if let json = response as? [String:Any] {
                if json["id"] as? String != nil, json["secret"] as? String != nil {
                    XCTAssertNotNil(json)
                    expected.fulfill()
                } else {
                    XCTFail("Access response was not in correct format")
                    expected.fulfill()
                }
            } else {
                XCTFail("Access request was not a dictionary")
                expected.fulfill()
            }
        } else {
            XCTFail("Access response was nil")
            expected.fulfill()
        }
    }
    waitForExpectations(timeout: 3) { error in
        if let error = error {
            XCTFail("Access request failure: \(error.localizedDescription)")
        }
    }

}

更新简化通话解决了问题：

func testAccessKeys() {
    let expected = expectation(description: "Run the Access request")
    sut.request(.Access, data: nil) { finished, response in
        if response != nil && finished == true {
            if let json = response as? [String:Any] {
                if json["id"] as? String != nil, json["secret"] as? String != nil {
                    print("ID: \(String(describing: json["id"]))")
                    print("Secret: \(String(describing: json["secret"]))")
                    expected.fulfill()
                } else {
                    XCTFail("Access response was not in correct format")
                }
            } else {
                XCTFail("Access request was not a dictionary")
            }
        } else {
            XCTFail("Access response was nil")
        }
    }
    waitForExpectations(timeout: 3, handler: nil)
}

Answer 1

我有类似的问题。我通过确保只expectation.fulfill()被调用一次来解决它。如果您有多个期望，还请确保您的期望具有不同的描述。例如：self.expectation(description: "expected description"）
多次调用它会导致崩溃。
就我而言，我有一个依赖于另一个测试用例的测试用例。在那里，期望被多次召唤。我把它做成一个了解决了
您可能已经将UPDATE发布为答案！

API违规 - 在Swift 4中进行多次调用

1 个答案: