运行所有测试都使用相同的测试数据

Question

正在从 excel 文件中读取测试数据。要求：我首先要在同一个测试数据上进行所有测试运行即。 excel 行，然后用另一行进行所有测试。

分辨率：尝试将 @Factory 与我的 @DataProvider

一起使用

问题：如果我在@dataProvider 中使用核心值，那么它工作正常。但是当从 excel 动态获取时，如果给我错误：[ERROR] Caused by: java.lang.NullPointerException

package com;

import java.util.HashMap;
import utils.*;
import org.testng.annotations.*;

public class TestFile extends BaseClass {


public HashMap<String, String> values = new HashMap<String, String>();

@Test()
private void Test_01() {

    System.out.println(values.get("Number"));
}

@Factory(dataProvider = "getDataSet")
public TestFile(HashMap<String, String> values) {
    this.values = values;

}


@DataProvider
private static Object[] getDataSet() {
    String sheetName = mContext.getCurrentXmlTest().getSuite().getParameters().get(Constants.BU_LEISURE_SHEET_NAME);

    int i = 0;
    Object[] dataSet = null;
    HashMap<String, HashMap<String, String>> sheet = testData.get(sheetName);
    dataSet = new Object[sheet.size()][1];
    for (String row : sheet.keySet()) {

        HashMap<String, String> rowValuesMap = new HashMap<>();
        for (String columnName : sheet.get(row).keySet()) {
            rowValuesMap.put(columnName, sheet.get(row).get(columnName));
        }

        dataSet[i] = rowValuesMap;

        i++;
    }
    return dataSet;

}

}

基础Class

public class BaseClass extends DataReader {
@BeforeSuite
public static void setup(ITestContext context) throws IOException {
    mContext = context;
 // other code
}
}

Datareader class 读取 excel 文件

public class DataReader {
public static HashMap<String, HashMap<String, HashMap<String, String>>> testData = new HashMap<String, HashMap<String, HashMap<String, String>>>();

// other code
}

错误日志

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-surefire-plugin:2.18.1:test (default-test) on project ATGDMAP: Execution default-test of goal org.apache.maven.plugins:maven-surefire-plugin:2.18.1:test failed: There was an error in the forked process [ERROR] java.lang.RuntimeException: java.lang.NullPointerException [ERROR] at org.testng.internal.MethodInvocationHelper.invokeMethodNoCheckedException(MethodInvocationHelper.java:49) [ERROR] at org.testng.internal.MethodInvocationHelper.invokeDataProvider(MethodInvocationHelper.java:131) [ERROR] at org.testng.internal.Parameters.handleParameters(Parameters.java:706) [ERROR] at org.testng.internal.FactoryMethod.invoke(FactoryMethod.java:151) [ERROR] at org.testng.internal.TestNGClassFinder.processFactory(TestNGClassFinder.java:223) [ERROR] at org.testng.internal.TestNGClassFinder.processMethod(TestNGClassFinder.java:179) [ERROR] at org.testng.internal.TestNGClassFinder.processClass(TestNGClassFinder.java:171) [ERROR] at org.testng.internal.TestNGClassFinder.(TestNGClassFinder.java:121) [ERROR] at org.testng.TestRunner.initMethods(TestRunner.java:370) [ERROR] at org.testng.TestRunner.init(TestRunner.java:271) [ERROR] at org.testng.TestRunner.init(TestRunner.java:241) [ERROR] at org.testng.TestRunner.(TestRunner.java:167) [ERROR] at org.testng.SuiteRunner$DefaultTestRunnerFactory.newTestRunner(SuiteRunner.java:663) [ERROR] at org.testng.SuiteRunner.init(SuiteRunner.java:260) [ERROR] at org.testng.SuiteRunner.(SuiteRunner.java:198) [ERROR] at org.testng.TestNG.createSuiteRunner(TestNG.java:1295) [ERROR] at org.testng.TestNG.createSuiteRunners(TestNG.java:1273) [ERROR] at org.testng.TestNG.runSuitesLocally(TestNG.java:1128) [ERROR] at org.testng.TestNG.runSuites(TestNG.java:1049) [ERROR] at org.testng.TestNG.run(TestNG.java:1017) [ERROR] at org.apache.maven.surefire.testng.TestNGExecutor.run(TestNGExecutor.java:295) [ERROR] at org.apache.maven.surefire.testng.TestNGXmlTestSuite.execute(TestNGXmlTestSuite.java:84) [ERROR] at org.apache.maven.surefire.testng.TestNGProvider.invoke(TestNGProvider.java:90) [ERROR] at org.apache.maven.surefire.booter.ForkedBooter.invokeProviderInSameClassLoader(ForkedBooter.java:203) [ERROR] at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:155) [ERROR] at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:103) [ERROR] Caused by: java.lang.NullPointerException [ERROR] at com.TestFile.getDataSet(TestFile.java:27) [ERROR] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [ERROR] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) [ERROR] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) [ERROR] at java.lang.reflect.Method.invoke(Method.java:498) [ERROR] at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:124) [ERROR] at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:74) [ERROR] at org.testng.internal.MethodInvocationHelper.invokeMethodNoCheckedException(MethodInvocationHelper.java:45) [ERROR] ... 25 more [ERROR] -> [Help 1] [ERROR] [ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch. [ERROR] Re-run Maven using the -X switch to enable full debug logging.

Answer 1

问题出在你的测试代码上

您正在通过 @BeforeSuite 注释方法获取 ITestContext 对象。但是当您使用与数据提供者耦合的工厂时，TestNG 首先找到与您的工厂方法关联的数据提供者（在本例中为构造函数）。一旦找到数据提供者方法，它就会调用它来获取所有要用于迭代和创建测试 class 实例的数据集。在您的案例中，数据提供者指的是一个上下文对象（在本例中为 mContext），只有在调用 @BeforeSuite 方法时才能初始化该对象。 @BeforeSuite 方法直到且除非实例被创建（这是工厂方法试图做的）才会被调用

这是执行此操作的正确方法。

在我的示例中，excel 传播sheet 有两个 sheet，即，

员工
学生

员工sheet里面有以下数据

+--------+--------------------+
|  name  |       email        |
+--------+--------------------+
| John   | john@example.com   |
| Rajeev | rajeev@example.com |
| Jack   | jack@example.com   |
+--------+--------------------+

并且 student sheet 中有以下数据。

+-------+--------+
| name  | rollNo |
+-------+--------+
| Surya |      1 |
| Rajni |      2 |
| Kamal |      3 |
+-------+--------+

使用工厂的测试class和读取上述传播的数据提供者sheet

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.apache.poi.openxml4j.exceptions.InvalidFormatException;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.DataFormatter;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.ss.usermodel.WorkbookFactory;
import org.testng.Assert;
import org.testng.ITestContext;
import org.testng.annotations.DataProvider;
import org.testng.annotations.Factory;
import org.testng.annotations.Test;

public class TestclassSample {

  private Map<String, String> data;
  private static final String SHEET = "sheet";
  private static final String FILENAME = "filename";

  @Factory(dataProvider = "dp")
  public TestclassSample(Map<String, String> data) {
    this.data = data;
  }

  @Test
  public void dataIsNotEmpty() {
    System.err.println("Ensuring that " + data + " is not empty");
    Assert.assertFalse(data.isEmpty());
  }

  @Test
  public void dataHasAtleastTwoColumns() {
    System.err.println("Ensuring that " + data + " has atleast 2 entries");
    Assert.assertTrue(data.size() >= 2);
  }

  @DataProvider(name = "dp")
  public static Object[][] getData(ITestContext context)
      throws IOException, InvalidFormatException {
    String filename = context.getCurrentXmlTest().getParameter(FILENAME);
    if (filename == null || filename.trim().isEmpty()) {
      throw new IllegalArgumentException("File name was not present as a parameter");
    }
    Workbook workbook = WorkbookFactory.create(new File(filename));
    String sheet = context.getCurrentXmlTest().getParameter(SHEET);
    if (sheet == null || sheet.trim().isEmpty()) {
      throw new IllegalArgumentException("Sheet name was not present as a parameter");
    }
    Sheet worksheet = workbook.getSheet(sheet);
    DataFormatter dataFormatter = new DataFormatter();
    Row headingRow = worksheet.getRow(0);
    List<String> heading = new ArrayList<>();
    for (Cell cell : headingRow) {
      heading.add(dataFormatter.formatCellValue(cell));
    }
    List<Map<String, String>> information = new ArrayList<>();
    for (int i = 1; i < worksheet.getLastRowNum(); i++) {
      Map<String, String> data = new HashMap<>();
      int index = 0;
      for (Cell cell : worksheet.getRow(i)) {
        data.put(heading.get(index++), dataFormatter.formatCellValue(cell));
      }
      information.add(data);
    }

    Object[][] data = new Object[information.size()][1];
    for (int i = 0; i < information.size(); i++) {
      data[i] = new Object[] {information.get(i)};
    }
    workbook.close();
    return data;
  }
}

testng 套件 xml 如下所示

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE suite SYSTEM "http://testng.org/testng-1.0.dtd">
<suite name="53358567_suite" parallel="false" verbose="2" group-by-instances="true">
    <parameter name="sheet" value="student"/>
    <parameter name="filename" value="src/test/resources/53358567.xlsx"/>
    <test name="53358567_test">
        <classes>
            <class name="com.rationaleemotions.Whosebug.qn53358567.TestclassSample"/>
        </classes>
    </test>
</suite>

输出结果如下

...
... TestNG 7.0.0-beta1 by Cédric Beust (cedric@beust.com)
...
Ensuring that {name=Rajni, rollNo=2} has atleast 2 entries
Ensuring that {name=Rajni, rollNo=2} is not empty
Ensuring that {name=Surya, rollNo=1} has atleast 2 entries
Ensuring that {name=Surya, rollNo=1} is not empty
PASSED: dataHasAtleastTwoColumns
PASSED: dataIsNotEmpty
PASSED: dataHasAtleastTwoColumns
PASSED: dataIsNotEmpty

===============================================
    53358567_test
    Tests run: 4, Failures: 0, Skips: 0
===============================================

===============================================
53358567_suite
Total tests run: 4, Passes: 4, Failures: 0, Skips: 0
===============================================


Process finished with exit code 0

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