class CreateDispositionTests {
        static java.util.stream.Stream<Arguments> flagsProvider() {
            return java.util.stream.Stream.of(
                    Arguments.of(SmbConstants.O_TRUNC | SmbConstants.O_CREAT, SmbComNTCreateAndX.FILE_OVERWRITE_IF),
                    Arguments.of(SmbConstants.O_TRUNC, SmbComNTCreateAndX.FILE_OVERWRITE),
                    Arguments.of(SmbConstants.O_CREAT | SmbConstants.O_EXCL, SmbComNTCreateAndX.FILE_CREATE),

        assertFalse(it.hasNext());

        verify(filter, times(2)).accept(any());
    }

    static Stream<Arguments> invalidNamesAndFilterFlag() {
        return Stream.of(Arguments.of(null, false), Arguments.of("", false), Arguments.of(null, true), Arguments.of("", true));
    }

    @ParameterizedTest(name = "Invalid name=''{0}'' with filter={1} is skipped")
    @MethodSource("invalidNamesAndFilterFlag")

class SMBProtocolDowngradeExceptionTest {

    /**
     * Provides messages including edge cases (null and empty) for parameterized testing.
     */
    static Stream<Arguments> messages() {
        return Stream.of(Arguments.of((String) null), Arguments.of(""), Arguments.of("unexpected downgrade"));
    }

    @Test
    @DisplayName("Default ctor: null message/cause; toString is class name; type hierarchy")

     * @param args
     *            Array of arguments
     */
    public EmptyArgumentException(final String argName, final String messageCode, final Object[] args) {
        this(argName, messageCode, args, null);
    }

    /**
     * Creates an {@link EmptyArgumentException}.
     *
     * @param argName
     *            Name of the argument
     * @param messageCode
     *            Message code
     * @param args

     */
    static Stream<org.junit.jupiter.params.provider.Arguments> validInputs() {
        return Stream.of(org.junit.jupiter.params.provider.Arguments.of(0x0001, 0x00000000),
                org.junit.jupiter.params.provider.Arguments.of(0xFFFF, 0x12345678),
                org.junit.jupiter.params.provider.Arguments.of(-1, -123456));
    }

    @ParameterizedTest
    @MethodSource("validInputs")

     * --------------------------------------------------------------------- */
    private static Stream<Arguments> hostnamesProvider() {
        return Stream.of(Arguments.of("localhost", "127.0.0.1", "LOCALHOST"), Arguments.of("mycomputer.local", "mycomputer", "MYCOMPUTER"),
                Arguments.of("mycomputer.example.com", "mycomputer", "MYCOMPUTER"));
    }

    static Stream<Arguments> implementations() {
        return Stream.of(Arguments.of("returns self", (Supplier<SmbRenewableCredentials>) SelfRenewingCreds::new, true, false),
                Arguments.of("returns new", (Supplier<SmbRenewableCredentials>) NewRenewingCreds::new, false, true),

    }

    private static Stream<Arguments> provideFlagCombinations() {
        return Stream.of(Arguments.of(0x0, false), Arguments.of(0x1, true), // DFS
                Arguments.of(0x2, true), // DFS_ROOT
                Arguments.of(0x3, true), // DFS | DFS_ROOT
                Arguments.of(0x8000, false), // ENCRYPT_DATA only
                Arguments.of(0x8001, true), // ENCRYPT_DATA | DFS

import org.junit.jupiter.api.extension.ExtensionContext
import org.junit.jupiter.params.provider.Arguments
import org.junit.jupiter.params.provider.ArgumentsProvider

abstract class SimpleProvider : ArgumentsProvider {
  override fun provideArguments(context: ExtensionContext) = arguments().map { Arguments.of(it) }.stream()

  @Throws(Exception::class)
  abstract fun arguments(): List<Any>

from unicorn import UnicornMiddleware

app = FastAPI()

app.add_middleware(UnicornMiddleware, some_config="rainbow")
```

`app.add_middleware()` receives a middleware class as the first argument and any additional arguments to be passed to the middleware.

## Integrated middlewares { #integrated-middlewares }

**FastAPI** includes several middlewares for common use cases, we'll see next how to use them.