java - JUnit + Java + ErrorCollector 问题

Question

我在使用 Java 中的 ErrorCollectors 时遇到了一些问题。

我有一些代码，正在比较两个值。如果值匹配，则结果为通过。如果值不匹配，则失败。听起来很简单。所以我创建了一个基本的测试用例:

public class CB_Test {


    @Rule
    public ErrorCollector collector = new ErrorCollector();

    @Before
    public void setUp() {
        //steps = new WebDriverSteps(new FirefoxDriver());
        //steps = new WebDriverSteps();
    }

    @Test
    public void testme() {
        String checkMe;
        String value;

        checkMe = "1234";
        value   = "2234";

        System.out.println("value coming in : " + value);
        System.out.println("value to check  : " + checkMe);
        collector.checkThat("Check values match", value, is(checkMe));

    }
}

其行为完全符合我的预期。然而我想让这段代码能够从其他地方调用。所以我创建了这样的“主”文件:

public class ABC_Test {

    @Before
    public void setUp() {
        //steps = new WebDriverSteps(new FirefoxDriver());
        //steps = new WebDriverSteps();
    }

    @Test
    public void check() {
        CheckVal dv = new CheckVal();

        try {
            dv.checkTable("4234");
        } catch (AssertionError er) {
            System.out.println("22");
        } catch (Exception e) {
            System.out.println("23");
        } catch (Throwable t) {
            System.out.println("24");
        }

    }

}

并将代码移至:

public class CheckVal {

    @Rule
    public ErrorCollector collector = new ErrorCollector();

    public void checkTable(String value) {

        String checkMe;

        checkMe = "1234";

        System.out.println("value coming in : " + value);
        System.out.println("value to check  : " + checkMe);
        collector.checkThat("Check values match", value, is(checkMe));

    }

}

但是现在，当我运行代码时，即使我引入一个值导致生成失败，我也总是获得通过。我看不出我在这里做错了什么。 (我知道代码很困惑 - 这只是我尝试将事情分解为最简单的方法来尝试查看我的问题。)

Answer 1

@Rule 不包含在由测试运行程序运行并处理所有注释的测试类中。您的代码此时只是代码。

您需要更改代码以将 @Rule 移动到被测试的类，以便处理注释:

import org.junit.*;
import org.junit.rules.ErrorCollector;

public class ABC_Test {
    @Rule
    public ErrorCollector collector = new ErrorCollector();

    @Before
    public void setUp() {
       //steps = new WebDriverSteps(new FirefoxDriver());
       //steps = new WebDriverSteps();
    }

   @Test
   public void check() {
      CheckVal dv = new CheckVal(collector);

      try {
          dv.checkTable("4234");
      } catch (AssertionError er) {
        System.out.println("22");
      } catch (Exception e) {
        System.out.println("23");
      } catch (Throwable t) {
        System.out.println("24");
      }
  }

}

然后修改可重用类以接受 ErrorCollector 并正常处理:

import org.junit.*;
import org.junit.rules.ErrorCollector;
import org.hamcrest.CoreMatchers;

public class CheckVal {

public ErrorCollector collector = null;

public CheckVal(ErrorCollector collector) {
    this.collector = collector;
}

public void checkTable(String value) {

    String checkMe;

    checkMe = "1234";

    System.out.println("value coming in : " + value);
    System.out.println("value to check  : " + checkMe);
    collector.checkThat("Check values match", value, CoreMatchers.is(checkMe));

}

}

IntelliJ(或您的测试运行程序)然后按预期报告错误:

java.lang.AssertionError: Check values match
Expected: is "1234"
    but: was "4234"