无法实例化测试步骤类 [英] Cannot instantiate test steps class

问题描述

我在项目中添加了以下jar文件：

I have following jar files added to my project :

1. gherkin 2.12


2. 黄瓜- junit 1.2.5


3. 黄瓜java 1.2.5


4. 黄瓜核心1.2.5


5. 黄瓜jvm -deps 1.0.5


6. cobetura 2.1.1


7. mockito全部1.9.1


8. 黄瓜报告3.13

1. gherkin 2.12
2. cucumber-junit 1.2.5
3. cucumber-java 1.2.5
4. cucumber core 1.2.5
5. cucumber jvm-deps 1.0.5
6. cobetura 2.1.1
7. mockito all 1.9.1
8. cucumber-reporting 3.13

尝试运行测试运行程序类时遇到错误：

I am getting an error when I try to run test runner class:

 cucumber.runtime.CucumberException: Failed to instantiate class stepDefinition.Test_steps

测试运行程序类：

package CucumberTest;

import org.junit.runner.RunWith;
import cucumber.api.junit.Cucumber;
import cucumber.api.CucumberOptions;

@RunWith(Cucumber.class)
@CucumberOptions(
        features = "Feature"
        ,glue={"stepDefinition"}
        )

public class TestRunner {


}

Test_steps类

package stepDefinition;

import java.util.concurrent.TimeUnit;

import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.chrome.ChromeDriver;
import org.openqa.selenium.support.ui.ExpectedConditions;
import org.openqa.selenium.support.ui.WebDriverWait;
import PageObject.LoginVariables;
import cucumber.api.PendingException;
import cucumber.api.java.en.Given;
import cucumber.api.java.en.Then;
import cucumber.api.java.en.When;


public class Test_steps {

    private static WebDriver driver = null;
    WebDriverWait wait = new WebDriverWait(driver, 60);

    @Given("^User is on Homepage$")
    public void user_is_on_Homepage() throws Throwable {
        // Write code here that turns the phrase above into concrete actions
        driver = new ChromeDriver();
        System.setProperty("webdriver.chrome.driver", "C:\\Selenium\\chromedriver.exe");
        driver.manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS);
        driver.get("http://test.salesforce.com");

        throw new PendingException();
    }

    @When("^User Enters userId and Password$")
    public void user_Enters_userId_and_Password() throws Throwable {
        // Write code here that turns the phrase above into concrete actions

        wait.until(ExpectedConditions
                .visibilityOfElementLocated(By.xpath(LoginVariables.login_xpath)))
                .sendKeys("[e-mail]");

        wait.until(ExpectedConditions
                .visibilityOfElementLocated(By.xpath(LoginVariables.password_xpath)))
                .sendKeys("password");

        wait.until(ExpectedConditions
                .visibilityOfElementLocated(By.xpath(LoginVariables.login_xpath))).click();

        throw new PendingException();
    }

    @Then("^User is able to login sucessfully in salesorce$")
    public void user_is_able_to_login_sucessfully_in_salesorce() throws Throwable {
        // Write code here that turns the phrase above into concrete actions

        System.out.println("User Login Sucessful");
        throw new PendingException();
    }

}

文件夹结构：

Folder Structure:

推荐答案

问题出在下面代码的第二行，因为初始化 wait时 driver对象为null，这会导致NullPointerException。

The issue is on the second line of the code below since the "driver" object is null when the "wait" is initialized and that causes a NullPointerException.

private static WebDriver driver = null;
WebDriverWait wait = new WebDriverWait(driver, 60);

您应在Before钩子上初始化驱动程序，或在 driver之后初始化 wait 已初始化。

You should initialize the "driver" on a Before hook or initialize the "wait" after the "driver" has been initialized.

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