单元测试

测试用例开始之前自定义初始状态。

- (void)setUp {
    self.vc = [[ViewController alloc] init];
}

测试用例结束后提供执行清除。

- (void)tearDown {
    // Put teardown code here. This method is called after the invocation of each test method in the class.
    self.vc = nil;
}

逻辑测试

- (void)testExample {
    // This is an example of a functional test case.
    // Use XCTAssert and related functions to verify your tests produce the correct results.
    // 10 + 20 = 30 = 20 ?
    // 测试三部曲
    // give -- 我们给预期
    int num1 = 10;
    int num2 = 20;
    // when
    int num3 = [self.vc getPlus:num1 num2:num2];
    // then
    XCTAssertEqual(num3, 30,@"没有达到预想结果");
}

异步测试 - test开头

- (void)testAsy{
    // give
    XCTestExpectation *ec = [self expectationWithDescription:@"你是好人"];
    // when
    [self.vc loadData:^(id data) {
        // give
        // when - 逻辑
        XCTAssertNotNil(data);
        [ec fulfill]; //完成填充
    }];
    // then
    [self waitForExpectationsWithTimeout:5 handler:^(NSError * _Nullable error) {
        NSLog(@"error = %@",error);
    }]; 
}

性能测试+异步测试

// 性能只有相对性 -- 1s
- (void)testPerformanceExample {
    // This is an example of a performance test case.
    [self measureBlock:^{
        // 测试性能
        // 总时间
        // 平均时间
        // 散列分布
        // 数学统计学
        // 不做测试考虑范围
        [self.vcß openCamera];//提供条件
        
        [self.vc openCamera];//局部测试
    }];
}

局部性能测试

- (void)testPerformance{
    
    [self measureMetrics:@[XCTPerformanceMetric_WallClockTime] automaticallyStartMeasuring:NO forBlock:^{
        [self.vc openCamera];//提供条件
        
        [self startMeasuring];
        [self.vc openCamera];//局部测试
        [self stopMeasuring];
    }];
}