iOS-单元测试

参考资料

iOS进阶之单元测试-视频

概念

单元测试可以分为：

（1）逻辑测试
（2）性能测试
（3）异步测试
（4）UI测试

逻辑错误，通过断言XCTAssertEqual
TDD,测试驱动开发
shift+Command+0(开发者文档)

调用顺序：

+(void)setUp;
-(void)setUp;//把杯子里面的水倒干净，重新进行测试。
-(void)testExample;
-(void)tearDown;
-(void)setUp;
-(void)testPerformanceExample;
-(void)tearDown;

测试的基本结构

1.Given （创建测试添加。数据、初始化的对象、值。OCMock(用来创建测试条件)）
2.When （测试方法的参数里面。）
3.Then （断言，是否符合预期。）

eg:

    //1.Given
    XCTestExpectation *expectation = [self expectationWithDescription:@"Asyn Test is failed"];
    
    //2.When
    ViewController *vc = [ViewController new];
    [vc sendAsynRequest:^{
        //3.Then
        [expectation fulfill];//指定时间内没有执行这个方法，异常对象就会抛出
    }];
    
    [self waitForExpectationsWithTimeout:2 handler:^(NSError * _Nullable error) {
        NSLog(@"---%@",error.localizedDescription);
    }];

从哪里开始测试？

测试方法

1.盒子方法。白盒测试，黑盒测试，灰盒测试。

demo

ViewController.h

///逻辑测试
- (NSInteger)addWithNum1:(NSInteger)num1 num2:(NSInteger)num2;
///性能测试
- (void)loadDatas;
///异步测试
- (void)sendAsynRequest:(void(^)(id))block;

ViewController.m

///逻辑测试
- (NSInteger)addWithNum1:(NSInteger)num1 num2:(NSInteger)num2{
    return num1+num2;
}

///性能测试
- (void)loadDatas{
    for (NSInteger i=0; i<200; i++) {
        NSLog(@"性能测试。。。");
    }
}

///异步测试
- (void)sendAsynRequest:(void(^)(id))block{
    dispatch_async(dispatch_get_global_queue(0, 0), ^{
        [NSThread sleepForTimeInterval:3];
        dispatch_async(dispatch_get_main_queue(), ^{
            if (block) {
                block(@(random()));
            }
        });
    });
}

ViewControllerTests.m

///逻辑测试
- (void)testLogic{
    //1.Given
    NSInteger a = 1;
    NSInteger b = 2;
    
    //2.When
    ViewController *vc = [ViewController new];
    NSInteger add = [vc addWithNum1:a num2:b];
    
    //3.Then
    XCTAssertEqual(add, 3);
}

///异步测试
- (void)testAsync{
    //1.Given
    XCTestExpectation *expectation = [self expectationWithDescription:@"Asyn Test is failed"];
    
    //2.When
    ViewController *vc = [ViewController new];
    [vc sendAsynRequest:^(id obj){
        //3.Then
        XCTAssertNotNil(obj);
        [expectation fulfill];//指定时间内没有执行这个方法，异常对象就会抛出
    }];
    
    [self waitForExpectationsWithTimeout:4 handler:^(NSError * _Nullable error) {
        NSLog(@"---%@",error.localizedDescription);
    }];
}

- (void)testPerformanceExample {
    // This is an example of a performance test case.
    
    //性能测试
    [self measureMetrics:@[XCTPerformanceMetric_WallClockTime] automaticallyStartMeasuring:NO forBlock:^{
        
        ViewController *vc = [ViewController new];
        [self startMeasuring];
        [vc loadDatas];
        [self stopMeasuring];
    }];

    
//    [self measureBlock:^{
//        // Put the code you want to measure the time of here.
//        ViewController *vc = [ViewController new];
//        [vc loadDatas];
//    }];
}