AssertJ - 链接在一起 returns 并提取

AsserJ - chaing together returns and extracting

有时声纳云会抱怨测试中的断言数量。我想知道如何将断言一个接一个地链接起来,但有一种情况我无法弄清楚如何将断言链接起来。

import java.util.List;

import org.assertj.core.groups.Tuple;
import org.junit.jupiter.api.Test;

import lombok.Builder;
import lombok.Data;

import static org.assertj.core.api.Assertions.assertThat;

class FakeTest
{
    @Test
    void fakeTest()
    {
        // given
        var resStatus = "FINISHED";

        var tc1 = "Test case 1";
        var r1 = "GOOD";

        var tc2 = "Test case 2";
        var r2 = "ALARMING";

        var res1 = Response.builder()
                .status(resStatus)
                .testCaseName(tc1)
                .result(r1)
                .build();
        var res2 = Response.builder()
                .status(resStatus)
                .testCaseName(tc2)
                .result(r2)
                .build();

        var result = Result.builder()
                .responses(List.of(res1, res2))
                .value("PASSED")
                .build();

        // then
        assertThat(result)
                .returns("PASSED", Result::getValue);

        assertThat(result.getResponses())
                .extracting("status", "testCaseName", "result")
                .contains(
                        Tuple.tuple(resStatus, tc1, r1),
                        Tuple.tuple(resStatus, tc1, r2));
    }
}

@Data
@Builder
class Result
{
    private String value;
    private List<Response> responses;
}

@Data
@Builder
class Response
{
    private String status;
    private String testCaseName;
    private String result;
    private String error;
}

我如何在 FakeTest#fakeTest 中做断言,将它们链接起来而不是分成两个断言(一个用于 assertThat(result).returns(...) 然后 assertThat(result.getResponses ()).提取(...)...)

我想要实现的是:

assertThat(result)
                .returns("PASSED", Result::getValue)
                .extracting(Result::getResponses) // connection between two assertThat(...)
                .extracting("status", "testCaseName", "result")
                .contains(
                        Tuple.tuple(resStatus, tc1, r1),
                        Tuple.tuple(resStatus, tc1, r2));

我发现返回的断言对象是不同的:

由于 java 泛型限制,

extracting(singleParam or lambda) 无法 return 断言特定于提取的值类型,在这种情况下,可以使用 [=12 通知 AssertJ 该类型=] 看起来像:

static import org.assertj.core.api.InstanceOfAssertFactories.LIST;

assertThat(result)
                .returns("PASSED", Result::getValue)
                .extracting(Result::getResponses).asInstanceOf(LIST) // static import for readability
                .extracting("status", "testCaseName", "result")
                .contains(
                        Tuple.tuple(resStatus, tc1, r1),
                        Tuple.tuple(resStatus, tc1, r2));

InstanceOfAssertFactories 提供 AssertJ 支持断言的类型。

另一种选择是传递直接提取响应及其字段的 lambda(但这可能有点太多工作)。