Junit5 @ParameterizedTest 如何将数组作为参数之一传递

Junit5 @ParameterizedTest How to pass array as one of parameter

我有一个测试,我想在其中传递三个参数:

  1. 字符串
  2. 枚举
  3. 字符串数组

示例:

@ParameterizedTest
    @CsvSource({
            "/path/to/first/file.xlsx, FIRST, {THIRD PARAMETER SHOULD BE ARRAY OF STRINGS}",
            "/path/to/second/file.xlsx, SECOND, {THIRD PARAMETER SHOULD BE ARRAY OF STRINGS}"})
    void uploadFile(String path, FileType type, String[] errors) {
        HttpEntity httpEntity = prepareFileUploadEntity(path, type);

        ResponseEntity<ArrayList> response = getRestTemplate(AppRole.USER).exchange(UPLOAD_URL, HttpMethod.POST, httpEntity, ArrayList.class);

        assertNotNull(response);
        assertEquals(HttpStatus.BAD_REQUEST, response.getStatusCode());
        assertEquals(errors.length, response.getBody().size());
        for (String error : errors) {
            assertTrue(response.getBody().contains(error));
        }
    }

如何将第三个参数作为字符串数组传递,因为现在出现无法解析第三个参数的错误:

org.junit.jupiter.api.extension.ParameterResolutionException: Error resolving parameter at index 2

@CsvSource 使用 implicit conversion to convert CSV values to primitives, Enums or Dates. For other types like Arrays, you need explicit conversion.

假设您有一个格式如 @CsvSource("abc, 123, 'foo, bar'") 的 CSV 注释,您可以实现这样的参数转换器以将最后一个 CSV 列视为数组:

import org.junit.jupiter.params.converter.ArgumentConversionException;
import org.junit.jupiter.params.converter.SimpleArgumentConverter;

public class StringArrayConverter extends SimpleArgumentConverter {

    @Override
    protected Object convert(Object source, Class<?> targetType) throws ArgumentConversionException {
        if (source instanceof String && String[].class.isAssignableFrom(targetType)) {
            return ((String) source).split("\s*,\s*");
        } else {
            throw new IllegalArgumentException("Conversion from " + source.getClass() + " to "
                                               + targetType + " not supported.");
        }
    }

}

然后你可以在第三个参数上使用那个转换器:

@ParameterizedTest
@CsvSource("abc, 123, 'foo, bar'")
void test(String column1, int column2, @ConvertWith(StringArrayConverter.class) String[] column3) {
    assertEquals(column1, "abc");
    assertEquals(column2, 123);
    assertEquals(column3[0], "foo");
    assertEquals(column3[1], "bar");
}

小修正,在

return ((String) source).split("\s*,\s*");

应该是不同的符号(例如“;”)而不是“,”

那么在测试中应该是

@ParameterizedTest
@CsvSource("abc, 123, foo; bar")

适合我的最终版本:

import org.junit.jupiter.params.converter.ArgumentConversionException;
import org.junit.jupiter.params.converter.SimpleArgumentConverter;

public class StringArrayConverter extends SimpleArgumentConverter {

    @Override
    protected Object convert(Object source, Class<?> targetType) throws ArgumentConversionException {
        if (source instanceof String && String[].class.isAssignableFrom(targetType)) {
            return ((String) source).split("\s*;\s*");
        } else {
            throw new IllegalArgumentException("Conversion from " + source.getClass() + " to "
                                               + targetType + " not supported.");
        }
    }

}

测试:

@ParameterizedTest
@CsvSource("abc, 123, foo; bar")
void test(String column1, int column2, @ConvertWith(StringArrayConverter.class) String[] column3) {
    assertEquals(column1, "abc");
    assertEquals(column2, 123);
    assertEquals(column3[0], "foo");
    assertEquals(column3[1], "bar");
}