Java 参数在 TestNG 中传递默认值
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时间：2020-08-13 14:28:04 来源:igfitidea点击:
Parameters is passing default value in TestNG
提问by Learner
I'm facing the strange problem. Before writing here, I have done some research on this, but unable to solve the issue.
我正面临着奇怪的问题。在写这里之前，我对此做了一些研究，但无法解决问题。
I'm passing parameters but it is taking the default value for the parameter i.e. "no-Value".
我正在传递参数，但它采用参数的默认值，即“无值”。
Here is my code
这是我的代码
package rough;
import org.testng.annotations.AfterMethod;
import org.testng.annotations.Optional;
import org.testng.annotations.Parameters;
import org.testng.annotations.Test;
import org.testng.annotations.BeforeMethod;
import org.testng.Assert;
import java.util.regex.Pattern;
import java.util.concurrent.TimeUnit;
import org.junit.*;
import static org.hamcrest.CoreMatchers.*;
import org.openqa.selenium.*;
import org.openqa.selenium.chrome.ChromeDriver;
import org.openqa.selenium.firefox.FirefoxDriver;
import org.openqa.selenium.ie.InternetExplorerDriver;
import org.openqa.selenium.support.ui.Select;
public class Browsers {
private WebDriver driver;
private String baseUrl;
private boolean acceptNextAlert = true;
private StringBuffer verificationErrors = new StringBuffer();
@BeforeMethod
public void tearDown1() throws Exception {
System.out.println("Hello starting");
}
@Test
@Parameters({ "BROWSER" })
public void setUp(@Optional String BROWSER) throws Exception {
if(BROWSER.equalsIgnoreCase("FF"))
{
driver = new FirefoxDriver();
}
else
if(BROWSER.equalsIgnoreCase("IE"))
{
System.setProperty("webdriver.ie.driver", "g:/Selenium Jar Files/IEDriverServer.exe");
driver = new InternetExplorerDriver();
}
baseUrl = "http://book.theautomatedtester.co.uk/";
driver.manage().timeouts().implicitlyWait(30, TimeUnit.SECONDS);
System.out.println("Hello starting1111");
driver.get(baseUrl+"/chapter1");
driver.findElement(By.id("radiobutton")).click();
Select(driver.findElement(By.id("selecttype"))).selectByVisibleText("Selenium RC");
}
@AfterMethod
public void tearDown() throws Exception {
String verificationErrorString = verificationErrors.toString();
if (!"".equals(verificationErrorString)) {
Assert.fail(verificationErrorString);
}
}
private boolean isElementPresent(By by) {
try {
driver.findElement(by);
return true;
} catch (NoSuchElementException e) {
return false;
}
}
private boolean isAlertPresent() {
try {
driver.switchTo().alert();
return true;
} catch (NoAlertPresentException e) {
return false;
}
}
private String closeAlertAndGetItsText() {
try {
Alert alert = driver.switchTo().alert();
String alertText = alert.getText();
if (acceptNextAlert) {
alert.accept();
} else {
alert.dismiss();
}
return alertText;
} finally {
acceptNextAlert = true;
}
}
}
The XML used here is
这里使用的 XML 是
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE suite SYSTEM "http://testng.org/testng-1.0.dtd">
<suite name="Suite" parallel="True">
<test name="Test">
<parameter name = "BROWSER" value="FF"/>
<classes>
<class name="rough.Browsers"/>
</classes>
<test name="Test">
<parameter name = "BROWSER" value="IE"/>
<classes>
<class name="rough.Browsers"/>
</classes>
</test> <!-- Test -->
</suite> <!-- Suite -->
When I'm running the code getting this error:
当我运行代码时出现此错误：
[TestNG] Running:
C:\Users\Administrator\AppData\Local\Temp\testng-eclipse-2137105747\testng-customsuite.xml
Hello starting
FAILED: setUp("not-found")
java.lang.NullPointerException
at rough.Browsers.setUp(Browsers.java:55)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:84)
at org.testng.internal.Invoker.invokeMethod(Invoker.java:714)
at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:901)
at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1231)
at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:127)
at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:111)
at org.testng.TestRunner.privateRun(TestRunner.java:767)
at org.testng.TestRunner.run(TestRunner.java:617)
at org.testng.SuiteRunner.runTest(SuiteRunner.java:334)
at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:329)
at org.testng.SuiteRunner.privateRun(SuiteRunner.java:291)
at org.testng.SuiteRunner.run(SuiteRunner.java:240)
at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)
at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:86)
at org.testng.TestNG.runSuitesSequentially(TestNG.java:1224)
at org.testng.TestNG.runSuitesLocally(TestNG.java:1149)
at org.testng.TestNG.run(TestNG.java:1057)
at org.testng.remote.RemoteTestNG.run(RemoteTestNG.java:111)
at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:204)
at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:175)
回答by Akbar
From testng documentation, this is how @optional is used.
从 testng 文档中，这就是 @optional 的使用方式。
@Parameters("db")
@Test
public void testNonExistentParameter(@Optional("mysql") String db) { ... }
If no parameter named "db" is found in your testng.xml file, your test method will receive the default value specified inside the @Optional annotation: "mysql".
Try by correcting your code accordingly. I think that should resolve the issue. If it still doesn't then declare the parameters at the suite tag level in testng.xml and test it.
尝试相应地更正您的代码。我认为这应该可以解决问题。如果仍然没有，则在 testng.xml 中的套件标记级别声明参数并对其进行测试。
