Airtest IDE 自动化测试6 - 断言存在( assert_exists)和 断言不存在(assert_not_exists)

前言

Airtest IDE 提供了四种断言快捷断言的方式

• assert_exists 断言存在
• assert_not_exists 断言不存在
• assert_equal 断言相等
• assert_not_equal 断言不相等

断言存在(assert_exists)

assert_exists(*args, **kwargs) 设备屏幕上存在断言目标
参数:

• v 要检查的目标
• msg 断言的简短描述，它将被记录在报告中
• AssertionError 如果断言失败

返回:

• 目标坐标

支持平台: Android, Windows, iOS
示例: assert_exists(Template(r"tpl1607324047907.png"), "assert exists")

使用示例，断言 "我的" 页面存在 "登录/注册" 按钮

运行用例后查看测试报告

断言不存在(assert_not_exists)

assert_not_exists 跟上面的 assert_exists 用法一样
断言我的页面不存在“新课推荐”

断言失败 AssertionError

当断言失败的时候，会抛出AssertionError异常，程序不会继续往下走了
在我的页面，查找“新课推荐”，故意让断言失败

如果出现断言失败，会出现AssertionError: Template(D:\airtest_code\a3.air\tpl1621832250338.png) does not exist in screen, message: 我的-存在登录/注册按钮

airtest.core.error.TargetNotFoundError: 'Picture Template(D:\\airtest_code\\a3.air\\tpl1621832250338.png) not found in screen'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "airtest\cli\runner.py", line 73, in runTest
  File "site-packages\six.py", line 703, in reraise
  File "airtest\cli\runner.py", line 70, in runTest
  File "D:\airtest_code\a3.air\a3.py", line 12, in <module>
    assert_exists(Template(r"tpl1621832250338.png", record_pos=(-0.39, 0.069), resolution=(720, 1280)), "我的-存在登录/注册按钮")
  File "airtest\utils\logwraper.py", line 90, in wrapper
  File "airtest\core\api.py", line 669, in assert_exists
AssertionError: Template(D:\airtest_code\a3.air\tpl1621832250338.png) does not exist in screen, message: 我的-存在登录/注册按钮

----------------------------------------------------------------------
Ran 1 test in 41.761s

FAILED (failures=1)

关于查找超时

当页面上找不到元素的时候，不会立马断言失败，此时会有个timeout时间，默认是20秒。

ST.FIND_TIMEOUT是在setting.py文件配置的，默认查找超时是20s

# airtest.core.setting.py
class Settings(object):

    DEBUG = False
    LOG_DIR = None
    LOG_FILE = "log.txt"
    RESIZE_METHOD = staticmethod(cocos_min_strategy)
    # keypoint matching: kaze/brisk/akaze/orb, contrib: sift/surf/brief
    CVSTRATEGY = ["surf", "tpl", "brisk"]
    if sys.version_info[:2] > (3, 7):
        CVSTRATEGY = ["kaze", "tpl", "brisk"]
    KEYPOINT_MATCHING_PREDICTION = True
    THRESHOLD = 0.7  # [0, 1]
    THRESHOLD_STRICT = None  # dedicated parameter for assert_exists
    OPDELAY = 0.1
    FIND_TIMEOUT = 20
    FIND_TIMEOUT_TMP = 3
    PROJECT_ROOT = os.environ.get("PROJECT_ROOT", "")  # for ``using`` other script
    SNAPSHOT_QUALITY = 10  # 1-100 https://pillow.readthedocs.io/en/5.1.x/handbook/image-file-formats.html#jpeg
    # Image compression size, e.g. 1200, means that the size of the screenshot does not exceed 1200*1200
    IMAGE_MAXSIZE = os.environ.get("IMAGE_MAXSIZE", None)
    SAVE_IMAGE = True

判断元素不存在,查找超时时间是FIND_TIMEOUT_TMP = 3