通常配合public WebDriverWait(WebDriver driver, Duration timeout)和public V until(Function<? super T, V> isTrue)使用
ExpectedConditions类均返回ExpectedCondition对象，ExpectedCondition继承Function
1、 检查页面title是否是指定字符串
public static ExpectedCondition<Boolean> titleIs(final String title)
title：预期的标题，必须完全匹配.
示例：5秒内等待页面title成为“百度一下，你就知道”，否则抛出异常。
ExpectedCondition<Boolean> b = ExpectedConditions.titleIs("百度一下，你就知道");
new WebDriverWait(driver, Duration.ofSeconds(5)).until(b);
2、检查页面title是否包含指定字符串
public static ExpectedCondition<Boolean> titleContains(final String title)
title：包含的字符串
示例：5秒内等待页面title包含“百度一下”，否则抛出异常。
ExpectedCondition<Boolean> b = ExpectedConditions. titleContains ("百度一下");
new WebDriverWait(driver, Duration.ofSeconds(5)).until(b);
3、检查当前页面URL是否为指定URL
public static ExpectedCondition<Boolean> urlToBe(final String url)
4、检查当前页面URL包含指定字符串文本
public static ExpectedCondition<Boolean> urlContains(final String fraction)
5、检查当前页面URL是否匹配指定正则表达式
public static ExpectedCondition<Boolean> urlMatches(final String regex)
6、检查页面上是否存在指定元素（不一定可见）（By locator）
public static ExpectedCondition<WebElement> presenceOfElementLocated(final By locator)
示例：5秒内判断页面是否存在指定元素，不存在则抛出异常
By locator = By.name("name") ;
ExpectedCondition<WebElement> w = ExpectedConditions. presenceOfElementLocated(locator)
new WebDriverWait(driver, Duration.ofSeconds(5)).until(w);
7、检查页面上是否存在指定元素，且元素是可见的（By locator）
public static ExpectedCondition<WebElement> visibilityOfElementLocated(final By locator)
8、检查页面上所有与定位器匹配的元素存在且可见（By locator）
public static ExpectedCondition<List<WebElement>> visibilityOfAllElementsLocatedBy(final By locator)
示例：
By locator = By.name("id") ;
ExpectedCondition<List<WebElement>> ws= ExpectedConditions.visibilityOfAllElementsLocatedBy(locator) ;
new WebDriverWait(driver, Duration.ofSeconds(5)).until(ws);
9、检查页面上所有指定的元素存在且可见（WebElement… elements）
public static ExpectedCondition<List<WebElement>> visibilityOfAllElements(final WebElement... elements)
public static ExpectedCondition<List<WebElement>> visibilityOfAllElements(final List<WebElement> elements)
示例：
List<WebElement> elements = driver.findElements(By.id("id")) ;
ExpectedCondition<List<WebElement>> lw = ExpectedConditions. visibilityOfAllElements(elements) ;
WebElement element = driver.findElement(By.name("name"));
WebElement element1 = driver.findElement(By.name("name"));
ExpectedCondition<List<WebElement>> lw = ExpectedConditions.visibilityOfAllElements(element1,element) ;
new WebDriverWait(driver, Duration.ofSeconds(5)).until(lw);
10、检查页面上指定的元素存在且可见（WebElement element）
public static ExpectedCondition<WebElement> visibilityOf(final WebElement element)
示例：
WebElement element = driver.findElement(By.id("id")) ;
ExpectedCondition< WebElement> lw = ExpectedConditions.visibilityOf(element) ;
new WebDriverWait(driver, Duration.ofSeconds(5)).until(lw);
11、检查页面上是否存在至少一个满足定位的元素（By locator）
public static ExpectedCondition<List<WebElement>> presenceOfAllElementsLocatedBy(final By locator)
示例：
By locator = By.name("id") ;
ExpectedCondition<List<WebElement>> lw = ExpectedConditions. presenceOfAllElementsLocatedBy (locator) ;
new WebDriverWait(driver, Duration.ofSeconds(5)).until(lw);
12、检查指定元素的文本值是否与指定字符串一致（常用于等待同一元素文本值变更）
public static ExpectedCondition<Boolean> textToBePresentInElement(final WebElement element,final String text)
13、检查指定定位的文本值是否与指定字符串一致
public static ExpectedCondition<Boolean> textToBePresentInElementLocated(final By locator,final String text)
14、检查指定元素的‘value’是否与指定字符串一致
public static ExpectedCondition<Boolean> textToBePresentInElementValue(final WebElement element,final String text)
15、检查指定定位的‘value’是否与指定字符串一致
public static ExpectedCondition<Boolean> textToBePresentInElementValue(final By locator,final String text)
16、检查是否可切换至指定的iframe，如果可以，则完成切换
public static ExpectedCondition<WebDriver> frameToBeAvailableAndSwitchToIt(final String frameLocator)
frameLocator：id或name
public static ExpectedCondition<WebDriver> frameToBeAvailableAndSwitchToIt(final By locator)
public static ExpectedCondition<WebDriver> frameToBeAvailableAndSwitchToIt(final int frameLocator)
frameLocator：index索引
public static ExpectedCondition<WebDriver> frameToBeAvailableAndSwitchToIt(final WebElement frameLocator)
17、检查元素在页面上不可见或不存在
public static ExpectedCondition<Boolean> invisibilityOfElementLocated(final By locator)
18、检查页面元素是可见的，并且是可点击的
public static ExpectedCondition<WebElement> elementToBeClickable(final By locator)
public static ExpectedCondition<WebElement> elementToBeClickable(final WebElement element)
19、检查页面元素是否被选中
public static ExpectedCondition<Boolean> elementToBeSelected(final WebElement element)
20、检查页面指定定位元素的指定属性有特定的值
public static ExpectedCondition<Boolean> attributeToBe(final By locator,final String attribute,final String value)
public static ExpectedCondition<Boolean> attributeToBe(final WebElement element,final String attribute,final String value)
attribute：属性名称
value：指定的属性值
21、检查页面指定定位元素有指定的文本
public static ExpectedCondition<Boolean> textToBe(final By locator, final String value)
22、检查页面指定元素的指定属性包含特定的字符串
public static ExpectedCondition<Boolean> attributeContains(final WebElement element,final String attribute,final String value)
public static ExpectedCondition<Boolean> attributeContains(final By locator,final String attribute,final String value)
23、检查指定元素的指定属性值非空
public static ExpectedCondition<Boolean> attributeToBeNotEmpty(final WebElement element,final String attribute)
24、检查给定的所有元素存在但不可见（多个元素）
public static ExpectedCondition<Boolean> invisibilityOfAllElements(final WebElement... elements)
public static ExpectedCondition<Boolean> invisibilityOfAllElements(final List<WebElement> elements)
25、检查指定元素不可见（单个元素）
public static ExpectedCondition<Boolean> invisibilityOf(final WebElement element)