community: add AzureOpenAIWhisperParser (#27796)

Commandeered from https://github.com/langchain-ai/langchain/pull/26757.

---------

Co-authored-by: Sheepsta300 <128811766+Sheepsta300@users.noreply.github.com>

libs/community/tests/unit_tests/document_loaders/parsers/test_azure_whisper_parser.py

@@ -0,0 +1,104 @@
+"""Tests for the Azure OpenAI Whisper parser."""
+
+from pathlib import Path
+from typing import Any
+from unittest.mock import Mock, patch
+
+import pytest
+from langchain_core.documents import Document
+from langchain_core.documents.base import Blob
+
+from langchain_community.document_loaders.parsers.audio import AzureOpenAIWhisperParser
+
+_THIS_DIR = Path(__file__).parents[3]
+
+_EXAMPLES_DIR = _THIS_DIR / "examples"
+AUDIO_M4A = _EXAMPLES_DIR / "hello_world.m4a"
+
+
+@pytest.mark.requires("openai")
+@patch("openai.AzureOpenAI")
+def test_azure_openai_whisper(mock_client: Mock) -> None:
+    endpoint = "endpoint"
+    key = "key"
+    version = "115"
+    name = "model"
+
+    parser = AzureOpenAIWhisperParser(
+        api_key=key, azure_endpoint=endpoint, api_version=version, deployment_name=name
+    )
+    mock_client.assert_called_once_with(
+        api_key=key,
+        azure_endpoint=endpoint,
+        api_version=version,
+        max_retries=3,
+        azure_ad_token=None,
+    )
+    assert parser._client == mock_client()
+
+
+@pytest.mark.requires("openai")
+def test_is_openai_v1_lazy_parse(mocker: Any) -> None:
+    endpoint = "endpoint"
+    key = "key"
+    version = "115"
+    name = "model"
+
+    mock_blob = mocker.Mock(spec=Blob)
+    mock_blob.path = AUDIO_M4A
+    mock_blob.source = "test_source"
+
+    mock_openai_client = mocker.Mock()
+
+    mock_openai_client.audio.transcriptions.create.return_value = mocker.Mock()
+    mock_openai_client.audio.transcriptions.create.return_value.text = (
+        "Transcribed text"
+    )
+
+    mocker.patch("langchain_community.utils.openai.is_openai_v1", return_value=True)
+
+    parser = AzureOpenAIWhisperParser(
+        api_key=key, azure_endpoint=endpoint, api_version=version, deployment_name=name
+    )
+
+    parser._client = mock_openai_client
+
+    result = list(parser.lazy_parse(mock_blob))
+
+    assert len(result) == 1
+    assert isinstance(result[0], Document)
+    assert result[0].page_content == "Transcribed text"
+    assert result[0].metadata["source"] == "test_source"
+
+
+@pytest.mark.requires("openai")
+def test_is_not_openai_v1_lazy_parse(mocker: Any) -> None:
+    endpoint = "endpoint"
+    key = "key"
+    version = "115"
+    name = "model"
+
+    mock_blob = mocker.Mock(spec=Blob)
+    mock_blob.path = AUDIO_M4A
+    mock_blob.source = "test_source"
+
+    mock_openai_client = mocker.Mock()
+
+    mock_openai_client.audio.transcriptions.create.return_value = mocker.Mock()
+    mock_openai_client.audio.transcriptions.create.return_value.text = (
+        "Transcribed text"
+    )
+
+    mocker.patch("langchain_community.utils.openai.is_openai_v1", return_value=False)
+
+    parser = AzureOpenAIWhisperParser(
+        api_key=key, azure_endpoint=endpoint, api_version=version, deployment_name=name
+    )
+    parser._client = mock_openai_client
+
+    result = list(parser.lazy_parse(mock_blob))
+
+    assert len(result) == 1
+    assert isinstance(result[0], Document)
+    assert result[0].page_content == "Transcribed text"
+    assert result[0].metadata["source"] == "test_source"