final byte[] result = FileUtil.readBytes(emptyFile);
        assertThat(result.length, is(0));
    }

    /**
     * Test readBytes with null file throws exception
     */
    @Test
    public void testReadBytes_NullFile() {
        try {
            FileUtil.readBytes(null);
            fail("Expected IllegalArgumentException");

	if r.current.name, err = r.mr.ReadString(); err != nil {
		if err == io.EOF {
			err = io.ErrUnexpectedEOF
		}
		r.err = err
		return metaCacheEntry{}, err
	}
	r.current.metadata, err = r.mr.ReadBytes(r.current.metadata[:0])
	if err == io.EOF {
		err = io.ErrUnexpectedEOF
	}
	r.err = err
	return r.current, err
}

// next will read one entry from the stream.

            readParams.setAccessible(true);
            readParams.invoke(cancel, buffer, 0);

            Method readBytes = SmbComNtCancel.class.getDeclaredMethod("readBytesWireFormat", byte[].class, int.class);
            readBytes.setAccessible(true);
            readBytes.invoke(cancel, buffer, 0);

            // Then - buffer should remain unchanged
            assertArrayEquals(originalBuffer, buffer);

			n, err := rb.Read(buf[:readRng.Intn(len(buf))])
			readBytes += n
			read.Write(buf[:n])
			debugln("READ 1\t", n, readBytes)
			if err != nil {
				readErr = err
				break
			}

			// ReadByte
			b, err := rb.ReadByte()
			if err != nil {
				readErr = err
				break
			}
			readBytes++
			read.Write([]byte{b})
			debugln("READ 2\t", 1, readBytes)

			// TryRead

            byte[] arr = new byte[15];
            assertEquals(0, response.readParameterWordsWireFormat(arr, idx));
        }
    }

    @Nested
    @DisplayName("readBytesWireFormat tests")
    class ReadBytes {

        @Test
        @DisplayName("Returns 0 with null array")
        void nullArray() {
            assertEquals(0, response.readBytesWireFormat(null, 0));
        }

        @ParameterizedTest

                { getInputStream(jarEntry).use { jarInput -> jarInput.readBytes() } }
            }
        }
    }

    private
    fun directoryClassBytesIndexFor(dir: File): ClassBytesIndex = { classFilePath ->
        dir.resolve(classFilePath).takeIf { it.isFile }?.let { classFile -> { classFile.readBytes() } }
    }

    private

			z.LifecycleConfigXML, err = dc.ReadBytes(z.LifecycleConfigXML)
			if err != nil {
				err = msgp.WrapError(err, "LifecycleConfigXML")
				return
			}
		case "ObjectLockConfigXML":
			z.ObjectLockConfigXML, err = dc.ReadBytes(z.ObjectLockConfigXML)
			if err != nil {
				err = msgp.WrapError(err, "ObjectLockConfigXML")
				return
			}
		case "VersioningConfigXML":
			z.VersioningConfigXML, err = dc.ReadBytes(z.VersioningConfigXML)

              readBytesDelivered = readBuffer.read(sink, minOf(byteCount, readBuffer.size))
              readBytes.update(total = readBytesDelivered)

              val unacknowledgedBytesRead = readBytes.unacknowledged
              if (errorExceptionToDeliver == null &&
                unacknowledgedBytesRead >= connection.okHttpSettings.initialWindowSize / 2
              ) {

				t.Errorf("allocation occurred during write")
			}
			// Check that buffer has correct data.
			if !Equal(buf.Bytes()[0:startLen-readBytes], xBytes[readBytes:]) {
				t.Errorf("bad initial data at %d %d", startLen, growLen)
			}
			if !Equal(buf.Bytes()[startLen-readBytes:startLen-readBytes+growLen], yBytes) {
				t.Errorf("bad written data at %d %d", startLen, growLen)
			}
		}
	}
}

	}
}

func loadProcIOMetrics(ctx context.Context, io procfs.ProcIO, m MetricValues) {
	if io.RChar > 0 {
		m.Set(processIORCharBytes, float64(io.RChar))
	}

	if io.ReadBytes > 0 {
		m.Set(processIOReadBytes, float64(io.ReadBytes))
	}

	if io.WChar > 0 {
		m.Set(processIOWCharBytes, float64(io.WChar))
	}

	if io.WriteBytes > 0 {
		m.Set(processIOWriteBytes, float64(io.WriteBytes))
	}