使用 XCTestCase Objective-C 进行多次测试性能

Question

我在测试类中有 2 种性能测试方法。如果我单独运行它们，它们会通过。如果我运行孔类方法，它们会失败并显示消息：

**** 由于未捕获的异常“NSInternalInconsistencyException”而终止应用程序，原因：“API 违规 - 多次调用 -[XCTestExpectation 完成]。”*

有没有办法将一对性能测试包含在一个类中？

这里是示例代码：

- (void)testPerformanceAuthenticateWithLogin {
    XCTestExpectation *authenticateExpectation = [self expectationWithDescription:@"Authenticate With Login"];
    __block int userID = 0;
    [self measureBlock:^{
        [AuthenticationService authenticateWithLogin:email password:password success:^(AuthenticationResponse *result) {
            XCTAssert(result.isAuthenticated);
            userID = result.userID;
            [authenticateExpectation fulfill];
        } failure:^(NSError *error) {
            XCTAssertNil(error);
        }];
    }];
    [self waitForExpectationsWithTimeout:3 handler:^(NSError *error) {
        XCTAssertNil(error);
        [AuthenticationService logoutWithServicePersonID:userID success:nil failure:nil];
    }];
}

- (void)testPerformanceGetServicePersonByID {
    XCTestExpectation *getServicePersonExpectation = [self expectationWithDescription:@"get Service Person By ID"];
    __block int userID = 0;
    [AuthenticationService authenticateWithLogin:email password:password success:^(AuthenticationResponse *result) {
        userID = result.userID;
        [self loginSuccess:result];
        [self measureBlock:^{
            [ServicePersonService getServicePersonByIDWithServicePersonID:userID success:^(ServicePersonDTO *result) {
                XCTAssertNotNil(result);
                [getServicePersonExpectation fulfill];
            } failure:^(NSError *error) {
                XCTAssertNil(error);
            }];
        }];
    } failure:^(NSError *error) {
        XCTAssertNil(error);
    }];

    [self waitForExpectationsWithTimeout:3 handler:^(NSError *error) {
        XCTAssertNil(error);
        [AuthenticationService logoutWithServicePersonID:userID success:nil failure:nil];
    }];
}

Answer 1

measureBlock 实际上多次运行块内的代码以确定平均值。

如果我理解正确，您想测量身份验证需要多长时间。如果是这样的话：

• 您可以将期望放在测量块中，这样每次测量迭代完成时，测试迭代都会等待期望得到满足，然后再次执行块
• 您可以稍微提高预期超时时间以防万一。

我做过这样的事情（对我有用）：

- (void)testPerformanceAuthenticateWithLogin {
    [self measureBlock:^{
        __block int userID = 0;
        XCTestExpectation *authenticateExpectation = [self expectationWithDescription:@"Authenticate With Login"];

        [AuthenticationService authenticateWithLogin:email password:password success:^(AuthenticationResponse *result) {
            XCTAssert(result.isAuthenticated);
            userID = result.userID;
            [authenticateExpectation fulfill];
        } failure:^(NSError *error) {
            XCTAssertNil(error);
        }];

        [self waitForExpectationsWithTimeout:10 handler:^(NSError *error) {
            XCTAssertNil(error);
            [AuthenticationService logoutWithServicePersonID:userID success:nil failure:nil];
        }];
    }];
}