我不熟悉使用Selenium和Java进行测试。试图自动执行银行应用程序的登录功能:
在此过程中,我面临一种方法的空指针异常。
首先,我有两个课程:
打开(此类包括打开浏览器,使用凭据登录并使用@BeforeMethod
,@Test
和@AfterMethod
关闭浏览器的方法)
登录(包括具有凭据详细信息的方法)
我想做的是在@Test
注释下调用从类登录到类打开的方法。有人可以帮我解决以下错误
公开课:
package Jprogramming;
import java.util.concurrent.TimeUnit;
import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.chrome.ChromeDriver;
import org.testng.annotations.*;
public class open {
WebDriver driver;
@BeforeMethod
public void link() {
System.out.println("setting bank application");
System.setProperty("webdriver.chrome.driver","E:\\Java_Work\\chromedriver_win32\\chromedriver.exe" );
WebDriver driver = new ChromeDriver();
driver.manage().timeouts().implicitlyWait(10,TimeUnit.SECONDS);
driver.get("https://parabank.parasoft.com");
driver.manage().window().maximize();
}
@Test
public void credentials() {
login la = new login(driver);
la.username();
la.password();
la.login();
}
@AfterMethod
public void teardown() {
driver.quit();
}
}
班级登录:
package Jprogramming;
import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
public class login {
WebDriver driver;
By username = By.name("username");
By password = By.name("password");
By login = By.xpath("//*[@id='loginPanel']/form/div[3]/input");
public login(WebDriver driver) {
this.driver=driver;
}
public void username() {
driver.findElement(username).sendKeys("abc");
}
public void password() {
driver.findElement(password).sendKeys("cba");
}
public void login() {
driver.findElement(login).click();
}
}
我看到以下错误:
[RemoteTestNG] detected TestNG version 6.14.2
setting bank application
Starting ChromeDriver 2.45.615291 (ec3682e3c9061c10f26ea9e5cdcf3c53f3f74387) on port 47261
Only local connections are allowed.
May 06, 2019 1:53:42 PM org.openqa.selenium.remote.ProtocolHandshake createSession
INFO: Detected dialect: OSS
FAILED CONFIGURATION: @AfterMethod teardown
java.lang.NullPointerException
at Jprogramming.open.teardown(open.java:40)
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:124)
at org.testng.internal.MethodInvocationHelper.invokeMethodConsideringTimeout(MethodInvocationHelper.java:59)
at org.testng.internal.Invoker.invokeConfigurationMethod(Invoker.java:455)
at org.testng.internal.Invoker.invokeConfigurations(Invoker.java:222)
at org.testng.internal.Invoker.invokeMethod(Invoker.java:643)
at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:716)
at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:988)
at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:125) at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:109)
at org.testng.TestRunner.privateRun(TestRunner.java:648)
at org.testng.TestRunner.run(TestRunner.java:505)
at org.testng.SuiteRunner.runTest(SuiteRunner.java:455)
at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:450)
at org.testng.SuiteRunner.privateRun(SuiteRunner.java:415)
at org.testng.SuiteRunner.run(SuiteRunner.java:364)
at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)
at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:84)
at org.testng.TestNG.runSuitesSequentially(TestNG.java:1208)
at org.testng.TestNG.runSuitesLocally(TestNG.java:1137)
at org.testng.TestNG.runSuites(TestNG.java:1049)
at org.testng.TestNG.run(TestNG.java:1017)
at org.testng.remote.AbstractRemoteTestNG.run(AbstractRemoteTestNG.java:114)
at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:251)
at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:77)
FAILED: credentials
java.lang.NullPointerException
at Jprogramming.login.username(login.java:18)
at Jprogramming.open.credentials(open.java:32)
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:124)
at org.testng.internal.Invoker.invokeMethod(Invoker.java:580)
at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:716)
at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:988)
at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:125)
at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:109)
at org.testng.TestRunner.privateRun(TestRunner.java:648)
at org.testng.TestRunner.run(TestRunner.java:505)
at org.testng.SuiteRunner.runTest(SuiteRunner.java:455)
at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:450)
at org.testng.SuiteRunner.privateRun(SuiteRunner.java:415)
at org.testng.SuiteRunner.run(SuiteRunner.java:364)
at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)
at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:84)
at org.testng.TestNG.runSuitesSequentially(TestNG.java:1208)
at org.testng.TestNG.runSuitesLocally(TestNG.java:1137)
at org.testng.TestNG.runSuites(TestNG.java:1049)
at org.testng.TestNG.run(TestNG.java:1017)
at org.testng.remote.AbstractRemoteTestNG.run(AbstractRemoteTestNG.java:114)
at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:251)
at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:77)
===============================================
Default test
Tests run: 1, Failures: 1, Skips: 0
Configuration Failures: 1, Skips: 0
===============================================
===============================================
Default suite
Total tests run: 1, Failures: 1, Skips: 0
Configuration Failures: 1, Skips: 0
===============================================
答案 0 :(得分:2)
问题是您正在将WebDriver分配给link()
内部的局部变量,而不是实例变量。
更改行
WebDriver driver = new ChromeDriver();
为
driver = new ChromeDriver();
答案 1 :(得分:0)
此答案是错误的,并且基于错误的假设。将其留在此处作为背景
虽然我不能肯定地说,但我可以肯定@BeforeMethod
在与@test
不同的类实例中运行。
那么您能做什么呢?这些选项都可以使用:
制作WebDriver static
,以便在所有实例之间共享driver
。
static WebDriver driver;
使用@BeforeTest
代替@BeforeMethod
对于第二个选项我不太确定,如果每次都想要一个新的驱动程序,则在获得更多测试后,最终可能就不是您想要的。