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appium三种等待元素的方法

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    [LV.9]测试副司令

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    发表于 2019-1-7 16:35:55 | 只看该作者 回帖奖励 |倒序浏览 |阅读模式
    学过selenium的都知道,一般等待元素加载有三种办法:
    (1)sleep                  强制等待。示例:Thread.sleep(60000)
    (2)implicitlyWait   隐式等待。全局等待30s不管元素是否已经加载

    示例:driver.manage().timeouts().implicitlyWait(30, TimeUnit.SECONDS);
    (3)WebDriverWait     显示等待,这个需要增加一定等待时间,显示等待时间可以通过WebDriverWait 和util来决定,比如这个timeOut是60,如果该元素60s以内出现就不在等待
    1. WebDriverWait wait = new WebDriverWait(driver, 60);
    2.     WebElement e= wait.until(new  ExpectedCondition<WebElement>() {
    3.             @Override
    4.             public WebElement apply(WebDriver d) {
    5.                 return d.findElement(By.id("q"));
    6.             }
    7.         })
    复制代码

    以上三种方法中,只用WebDriverWait是selenium所特有,在java-client中也找不到相应的,如果想使用这种方法怎么办?

    改造轮子,首先添加AndroidDriverWait.java, 其实是将WebDriverWait的类型改成AndroidDriverWait

    具体代码如下:

    1. import org.openqa.selenium.NotFoundException;
    2. import org.openqa.selenium.TimeoutException;
    3. import org.openqa.selenium.WebDriver;
    4. import org.openqa.selenium.WebDriverException;
    5. import org.openqa.selenium.remote.RemoteWebDriver;
    6. import org.openqa.selenium.support.ui.Clock;
    7. import org.openqa.selenium.support.ui.FluentWait;
    8. import org.openqa.selenium.support.ui.Sleeper;
    9. import org.openqa.selenium.support.ui.SystemClock;

    10. import io.appium.java_client.android.AndroidDriver;

    11. import java.util.concurrent.TimeUnit;

    12. /**
    13.   * A specialization of {[url=home.php?mod=space&uid=26824]@link[/url] FluentWait} that uses WebDriver instances.
    14.   */
    15. public class AndroidDriverWait extends FluentWait<AndroidDriver> {
    16.    public final static long DEFAULT_SLEEP_TIMEOUT = 500;
    17.    private final WebDriver driver;

    18.    /**
    19.     * Wait will ignore instances of NotFoundException that are encountered (thrown) by default in
    20.     * the 'until' condition, and immediately propagate all others.  You can add more to the ignore
    21.     * list by calling ignoring(exceptions to add).
    22.     *
    23.     * @param driver The WebDriver instance to pass to the expected conditions
    24.     * @param timeOutInSeconds The timeout in seconds when an expectation is called
    25.     * @see AndroidDriverWait#ignoring(java.lang.Class)
    26.     */
    27.    public AndroidDriverWait(AndroidDriver driver, long timeOutInSeconds) {
    28.      this(driver, new SystemClock(), Sleeper.SYSTEM_SLEEPER, timeOutInSeconds, DEFAULT_SLEEP_TIMEOUT);
    29.    }

    30.    /**
    31.     * Wait will ignore instances of NotFoundException that are encountered (thrown) by default in
    32.     * the 'until' condition, and immediately propagate all others.  You can add more to the ignore
    33.     * list by calling ignoring(exceptions to add).
    34.     *
    35.     * @param driver The WebDriver instance to pass to the expected conditions
    36.     * @param timeOutInSeconds The timeout in seconds when an expectation is called
    37.     * @param sleepInMillis The duration in milliseconds to sleep between polls.
    38.     * @see AndroidDriverWait#ignoring(java.lang.Class)
    39.     */
    40.    public AndroidDriverWait(AndroidDriver driver, long timeOutInSeconds, long sleepInMillis) {
    41.      this(driver, new SystemClock(), Sleeper.SYSTEM_SLEEPER, timeOutInSeconds, sleepInMillis);
    42.    }

    43.    /**
    44.     * @param driver The WebDriver instance to pass to the expected conditions
    45.     * @param clock The clock to use when measuring the timeout
    46.     * @param sleeper Object used to make the current thread go to sleep.
    47.     * @param timeOutInSeconds The timeout in seconds when an expectation is
    48.     * @param sleepTimeOut The timeout used whilst sleeping. Defaults to 500ms called.
    49.     */
    50.    public AndroidDriverWait(AndroidDriver driver, Clock clock, Sleeper sleeper, long timeOutInSeconds,
    51.        long sleepTimeOut) {
    52.      super(driver, clock, sleeper);
    53.      withTimeout(timeOutInSeconds, TimeUnit.SECONDS);
    54.      pollingEvery(sleepTimeOut, TimeUnit.MILLISECONDS);
    55.      ignoring(NotFoundException.class);
    56.      this.driver = driver;
    57.    }

    58.    @Override
    59.    protected RuntimeException timeoutException(String message, Throwable lastException) {
    60.      TimeoutException ex = new TimeoutException(message, lastException);
    61.      ex.addInfo(WebDriverException.DRIVER_INFO, driver.getClass().getName());
    62.      if (driver instanceof RemoteWebDriver) {
    63.        RemoteWebDriver remote = (RemoteWebDriver) driver;
    64.        if (remote.getSessionId() != null) {
    65.          ex.addInfo(WebDriverException.SESSION_ID, remote.getSessionId().toString());
    66.        }
    67.        if (remote.getCapabilities() != null) {
    68.          ex.addInfo("Capabilities", remote.getCapabilities().toString());
    69.        }
    70.      }
    71.      throw ex;
    72.    }
    73. }
    复制代码

    接着需要修改接口:ExpectedCondition,将其WebDriver的类型替换为AndroidDriver

    具体代码:

    public interface ExpectedCondition<T> extends Function<AndroidDriver, T> {}

    经过修改之后,就可以在appium中直接使用:

    1. //wait for 60s if WebElemnt show up less than 60s , then return , until 60s
    2.         WebElement showClose = new AndroidDriverWait(driver, 60)
    3.                 .until(new ExpectedCondition<WebElement>() {
    4.                     public WebElement apply(AndroidDriver d) {
    5.                         return d.findElement(By
    6.                                 .id("com.zhihu.android:id/showcase_close"));
    7.                     }

    8.                 });
    复制代码




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