@Base64

@Base64 is an annotation that decodes Base64 encoded instances of type byte[] or String into byte[] instances:

import io.github.scordio.junit.converters.Base64;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.FieldSource;

@ParameterizedTest
@FieldSource("encoded")
void test(@Base64 byte[] bytes) {
    assertArrayEquals(new byte[] { 63, 63, 63 }, bytes);
}

static List<?> encoded = List.of("Pz8/", new byte[] { 80, 122, 56, 47 });

The annotation's optional encoding attribute configures the desired encoding scheme:

• BASIC (default): for the Basic encoding scheme
• URL: for the URL and Filename Safe encoding scheme
• MIME: for the MIME encoding scheme

The following source types and target declarations are supported.

Source Type	Target Declaration	Example
byte[]	@Base64 byte[]	new byte[] { 80, 122, 56, 47 } → new byte[] { 63, 63, 63 }
byte[]	@Base64(encoding = URL) byte[]	new byte[] { 80, 122, 56, 95 } → new byte[] { 63, 63, 63 }
byte[]	@Base64(encoding = MIME) byte[]	new byte[] { 80, 122, 13, 10, 56, 47 } → new byte[] { 63, 63, 63 }
String	@Base64 byte[]	"Pz8/" → new byte[] { 63, 63, 63 }
String	@Base64(encoding = URL) byte[]	"Pz8_" → new byte[] { 63, 63, 63 }
String	@Base64(encoding = MIME) byte[]	"Pz\r\n8/" → new byte[] { 63, 63, 63 }