}

    @Test
    @DisplayName("auth type is always NTLM")
    void testAuthTypeConstant(@Mock HttpServletRequest mockRequest, @Mock Principal mockPrincipal) {
        // No need to stub getName() since we're not calling getRemoteUser()
        NtlmHttpServletRequest request = new NtlmHttpServletRequest(mockRequest, mockPrincipal);
        assertEquals("NTLM", request.getAuthType());
        // Verify it returns the same value on multiple calls

import jcifs.SmbResource;

/**
 * Tests for {@link DirFileEntryAdapterIterator}.
 *
 * This test class verifies the basic functionality of DirFileEntryAdapterIterator.
 * Due to the iterator's constructor calling advance() immediately, which requires
 * the adapt() method to be functional, we test the behavior using simple mock
 * scenarios that don't require complex filter setups.
 */
@ExtendWith(MockitoExtension.class)

An example could be that you have an external authentication provider that you need to call.

You send it a token and it returns an authenticated user.

This provider might be charging you per request, and calling it might take some extra time than if you had a fixed mock user for tests.

You probably want to test the external provider once, but not necessarily call it for every test that runs.

	data []byte
}

func (r *testOneByteReadNoEOF) Read(p []byte) (n int, err error) {
	if r.eof {
		return 0, io.EOF
	}
	n = copy(p, r.data)
	r.eof = true
	return n, nil
}

// Wrapper for calling testMakeBucket for both Erasure and FS.
func TestMakeBucket(t *testing.T) {
	ExecObjectLayerTest(t, testMakeBucket)
}

// Tests validate bucket creation.

    public static final int CONNECTION_REFUSED = -1;
    /** Not listening on the called name */
    public static final int NOT_LISTENING_CALLED = 0x80;
    /** Not listening for the calling name */
    public static final int NOT_LISTENING_CALLING = 0x81;
    /** Called name not present */
    public static final int CALLED_NOT_PRESENT = 0x82;
    /** Insufficient resources to establish session */

        // and a file that is READONLY, HIDDEN, and SYSTEM
        when(mockFile.getAttributes()).thenReturn(SmbFile.ATTR_READONLY | SmbFile.ATTR_HIDDEN | SmbFile.ATTR_SYSTEM);

        // When calling accept
        // Then it should be accepted because the READONLY attribute is present
        assertTrue(dosFileFilter.accept(mockFile));
    }

    /**

        // Configure the mock to throw DcerpcException when wrap is called
        doThrow(new DcerpcException("Test wrap exception")).when(dcerpcSecurityProvider).wrap(mockNdrBuffer);

        // Assert that calling wrap throws DcerpcException
        assertThrows(DcerpcException.class, () -> dcerpcSecurityProvider.wrap(mockNdrBuffer));

        // Verify that the wrap method was called exactly once

import jcifs.smb1.util.LogStream;

/**
Do not use this class. Writing to the OutputStream of this type of socket
requires leaving a 4 byte prefix for the NBT header. IOW you must call
write( buf, 4, len ). Calling write( buf, 0, len ) will generate an error.
 */

public class NbtSocket extends Socket {

    private static final int SSN_SRVC_PORT = 139;
    private static final int BUFFER_SIZE = 512;

/// tip

You'll see what other "things", apart from functions, can be used as dependencies in the next chapter.

///

Whenever a new request arrives, **FastAPI** will take care of:

* Calling your dependency ("dependable") function with the correct parameters.
* Get the result from your function.
* Assign that result to the parameter in your *path operation function*.

```mermaid
graph TB

   * original transformation and its inverse to a value gives you the original value give-or-take
   * numerical errors. Calling this method multiple times on the same instance will always return
   * the same instance. Calling this method on the result of calling this method on an instance will
   * always return that original instance.
   */
  public abstract LinearTransformation inverse();