ASSERTJ：使用方法sostthatby时如何返回实际异常

发布于 2025-02-12 02:54:52 字数 1269 浏览 1 评论 0原文

我正在从Junit 5和Hamcrest主张迁移到Assertj，我无法找到正确从可执行文件中提取实际例外的方法。这是一个Junit/Hamcrest示例：

var result = assertThrows(MyException.class, () -> this.objectUnderTest.someMethod(param1, param2, param3));
assertThat(result.getError().getErrorCode(), equalTo(someValue));
assertThat(result.getError().getDescription(), equalTo("someString"));

我想拥有的是SMTH。如（assertj），

var result = assertThatThrownBy(() -> this.objectUnderTest.someMethod(param1, param2, param3))
 .isInstanceOf(MyException.class);
assertThat(result.getError().getErrorCode(), equalTo(someValue));
assertThat(result.getError().getDescription(), equalTo("someString"));

但是从ASSERTJ版本开始3.21.0 assertthatbyby方法为我提供了Abstract throverthrowableassert＆lt＆lt;？，？的实例？扩展可投掷＆gt;类，我找不到任何可以给我的方法，然后myException实例。因此，目前我最终使用了另一种方法，然后手动投射到myException：

Throwable throwable = Assertions.catchThrowable(() -> this.objectUnderTest.doFilterInternal(param1, param2, param3));
MyException exception = (MyException) throwable;
assertThat(exception.getError().getErrorCode(), equalTo(someValue));
assertThat(exception.getError().getDescription(), equalTo("someString"));

原文

I am migrating from JUnit 5 and Hamcrest Assertions to AssertJ and I can't figure out the right method for extracting the actual exception from the executable. Here is a JUnit/Hamcrest example:

var result = assertThrows(MyException.class, () -> this.objectUnderTest.someMethod(param1, param2, param3));
assertThat(result.getError().getErrorCode(), equalTo(someValue));
assertThat(result.getError().getDescription(), equalTo("someString"));

What I would like to have is smth. like (AssertJ)

var result = assertThatThrownBy(() -> this.objectUnderTest.someMethod(param1, param2, param3))
 .isInstanceOf(MyException.class);
assertThat(result.getError().getErrorCode(), equalTo(someValue));
assertThat(result.getError().getDescription(), equalTo("someString"));

But as of the AssertJ version 3.21.0 the assertThatThrownBy method gives me an instance of AbstractThrowableAssert<?, ? extends Throwable> class and I can't find any method which would give me then the MyException instance. So for now I ended up using another method and casting manually to MyException:

Throwable throwable = Assertions.catchThrowable(() -> this.objectUnderTest.doFilterInternal(param1, param2, param3));
MyException exception = (MyException) throwable;
assertThat(exception.getError().getErrorCode(), equalTo(someValue));
assertThat(exception.getError().getDescription(), equalTo("someString"));

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静待花开 2025-02-19 02:54:52

ASSERTJ提供两种用于检查自定义例外的样式：

保持示例的样式，可以使用CATCHTHROWABLE：

Throwable throwable = catchThrowable(() -> this.objectUnderTest.someMethod(param1, param2, param3));

assertThat(throwable)
  .asInstanceOf(InstanceOfAssertFactories.throwable(MyException.class))
  .extracting(MyException::getError)
  .returns(1, from(Error::getErrorCode))
  .returns("something", from(Error::getDescription));

或，使用catchthrowableabyoftype：

MyException exception = catchThrowableOfType(() -> this.objectUnderTest.someMethod(param1, param2, param3), MyException.class);

assertThat(exception)
  .extracting(MyException::getError)
  .returns(1, from(Error::getErrorCode))
  .returns("something", from(Error::getDescription));

AssertJ offers two styles for checking custom exceptions:

Keeping the style of your example, you can write the following with catchThrowable:

Throwable throwable = catchThrowable(() -> this.objectUnderTest.someMethod(param1, param2, param3));

assertThat(throwable)
  .asInstanceOf(InstanceOfAssertFactories.throwable(MyException.class))
  .extracting(MyException::getError)
  .returns(1, from(Error::getErrorCode))
  .returns("something", from(Error::getDescription));

or, with catchThrowableOfType:

MyException exception = catchThrowableOfType(() -> this.objectUnderTest.someMethod(param1, param2, param3), MyException.class);

assertThat(exception)
  .extracting(MyException::getError)
  .returns(1, from(Error::getErrorCode))
  .returns("something", from(Error::getDescription));

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预谋 2025-02-19 02:54:52

  var result = assertthatthrownby（（（） - ＆gt;
this.objectundertest.somemethod（param1，param2，param3）） 
.isinstanceOf（myException.class）;
assertthat（result.getError（）。getErrorCode（），均等（someValue））;
assertthat（result.getError（）。getDescription（），等于（“ somestring”））;

Assertj的方式如下：

assertThatExceptionOfType(MyException.class)
        .isThrownBy(() -> this.objectUnderTest.someMethod(param1, param2, param3))
        .satisfies(ex -> assertThat(ex.getError().getErrorCode()).isEqualTo(someValue));

var result = assertThatThrownBy(() ->
this.objectUnderTest.someMethod(param1, param2, param3)) 
.isInstanceOf(MyException.class);
assertThat(result.getError().getErrorCode(), equalTo(someValue));
assertThat(result.getError().getDescription(), equalTo("someString"));

The AssertJ way is following:

assertThatExceptionOfType(MyException.class)
        .isThrownBy(() -> this.objectUnderTest.someMethod(param1, param2, param3))
        .satisfies(ex -> assertThat(ex.getError().getErrorCode()).isEqualTo(someValue));

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