Question

从excel文件读取testdata。要求：我想首先我所有的测试都应该在相同的测试数据上运行。 excel行，然后再用另一行进行测试。

解决方案：尝试将@Factory与我的@DataProvider一起使用

问题：如果我在@dataProvider中使用硬核值，则效果很好。但是当从excel动态获取时，如果给我错误，则会出现：[ERROR]原因：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;

}

}

基类

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

Datareader类用于读取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

[错误]无法执行目标 org.apache.maven.plugins：maven-surefire-plugin：2.18.1：test （默认测试）在项目ATGDMAP上：目标的执行默认测试 org.apache.maven.plugins：maven-surefire-plugin：2.18.1：test失败：分叉的过程中出现错误[ERROR] java.lang.RuntimeException：java.lang.NullPointerException [错误]在 org.testng.internal.MethodInvocationHelper.invokeMethodNoCheckedException（MethodInvocationHelper.java:49）在[ERROR] org.testng.internal.MethodInvocationHelper.invokeDataProvider（MethodInvocationHelper.java:131）在[ERROR] org.testng.internal.Parameters.handleParameters（Parameters.java:706）在[ERROR] org.testng.internal.FactoryMethod.invoke（FactoryMethod.java:151）在[ERROR] org.testng.internal.TestNGClassFinder.processFactory（TestNGClassFinder.java:223）在[ERROR] org.testng.internal.TestNGClassFinder.processMethod（TestNGClassFinder.java:179）在[ERROR] org.testng.internal.TestNGClassFinder.processClass（TestNGClassFinder.java:171）在[ERROR] org.testng.internal.TestNGClassFinder。（TestNGClassFinder.java:121） org.testng.TestRunner.initMethods（TestRunner.java:370）上的[错误] org.testng.TestRunner.init（TestRunner.java:271）出现[ERROR] org.testng.TestRunner.init（TestRunner.java:241）在[错误] org.testng.TestRunner。（TestRunner.java:167）在[错误] org.testng.SuiteRunner $ DefaultTestRunnerFactory.newTestRunner（SuiteRunner.java:663） org.testng.SuiteRunner.init（SuiteRunner.java:260）出现[ERROR] [ERROR] 在org.testng.SuiteRunner。（SuiteRunner.java:198）[ERROR]在 org.testng.TestNG.createSuiteRunner（TestNG.java:1295）在[错误] org.testng.TestNG.createSuiteRunners（TestNG.java:1273）在[错误] org.testng.TestNG.runSuitesLocally（TestNG.java:1128）[ERROR]在 org.testng.TestNG.runSuites（TestNG.java:1049）[ERROR]在 org.testng.TestNG.run（TestNG.java:1017）在[错误] org.apache.maven.surefire.testng.TestNGExecutor.run（TestNGExecutor.java:295）在[ERROR] org.apache.maven.surefire.testng.TestNGXmlTestSuite.execute（TestNGXmlTestSuite.java:84）在[ERROR] org.apache.maven.surefire.testng.TestNGProvider.invoke（TestNGProvider.java:90）在[ERROR] org.apache.maven.surefire.booter.ForkedBooter.invokeProviderInSameClassLoader（ForkedBooter.java:203）在[ERROR] org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess（ForkedBooter.java:155）在[ERROR] org.apache.maven.surefire.booter.ForkedBooter.main（ForkedBooter.java:103） [错误]原因：java.lang.NullPointerException [错误]，位于 com.TestFile.getDataSet（TestFile.java:27）在[错误] sun.reflect.NativeMethodAccessorImpl.invoke0（本机方法）在[ERROR] sun.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:62）在[ERROR] sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:43） java.lang.reflect.Method.invoke（Method.java:498）的[ERROR] org.testng.internal.MethodInvocationHelper.invokeMethod（MethodInvocationHelper.java:124）在[ERROR] org.testng.internal.MethodInvocationHelper.invokeMethod（MethodInvocationHelper.java:74）在[ERROR] org.testng.internal.MethodInvocationHelper.invokeMethodNoCheckedException（MethodInvocationHelper.java:45） [错误] ...另外25个[错误]-> [帮助1] [错误] [错误] 有关错误的完整堆栈跟踪，请使用-e开关重新运行Maven。 [错误]使用-X开关重新运行Maven以启用完整的调试日志记录。

Answer 1

问题出在您的测试代码上。

您正在通过带有注释的ITestContext方法获得@BeforeSuite对象。但是，当您使用带有数据提供程序的工厂时，TestNG首先会找到与您的工厂方法（在这种情况下为构造函数）关联的数据提供程序。找到数据提供者方法后，它将调用该方法以获取将用于迭代和创建测试类实例的所有数据集。在您的情况下，数据提供程序引用的上下文对象（在这种情况下为mContext）只有在调用@BeforeSuite方法时才能初始化。除非且除非创建了实例，否则@BeforeSuite方法不会被调用（这是工厂方法试图执行的操作）

这是正确的方法。

在我的示例中，excel电子表格有两个工作表。

员工
学生

员工工作表中包含以下数据

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

和学生表中包含以下数据。

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

使用工厂和数据提供程序的测试类，该数据提供程序读取上述电子表格

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.stackoverflow.qn53358567.TestclassSample"/>
        </classes>
    </test>
</suite>

输出如下

...
... 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

使用相同的测试数据运行所有测试

1 个答案: