}

    @Test
    void testDerive() {
        ndrBuffer.advance(50); // Advance the original buffer
        NdrBuffer derivedBuffer = ndrBuffer.derive(10);

        // Verify derived buffer properties
        assertSame(buffer, derivedBuffer.buf);
        assertEquals(0, derivedBuffer.start); // Derived buffer starts from the original buffer's start
        assertEquals(10, derivedBuffer.index);

/*
 * Copyright 2020 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,

/*
 * Copyright 2024 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,

/*
 * Copyright 2025 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,

/*
 * Copyright 2020 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,

        assertEquals("original query", result);
    }

    @Test
    public void test_regenerateQuery_exception_returnsFailedQuery() {
        client.setChatResponse(null); // causes LlmException

        final String result = client.regenerateQuery("test question", "original query", "no_results", Collections.emptyList());

        assertEquals("original query", result);

            buf.append(',');
            buf.append(quoteEscape(pos));
        }
        return buf.toString();
    }

    private static String quoteEscape(final String original) {
        String result = original;

        if (result.indexOf('\"') >= 0) {
            result = result.replace("\"", "\"\"");
        }
        if (result.indexOf(',') >= 0) {
            return "\"" + result + "\"";

        // Extract the encoded part
        String extractedEncoded = fullFieldName.substring(Constants.FACET_FIELD_PREFIX.length());
        assertEquals(encodedFieldName, extractedEncoded);

        // Decode back to original
        String extractedFieldName = new String(BaseEncoding.base64().decode(extractedEncoded), StandardCharsets.UTF_8);
        assertEquals(originalFieldName, extractedFieldName);
    }

    @Test

/*
 * Copyright 2020 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,

/*
 * Copyright 2019 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,