Add OpenAI transcription merge tests.

   Fix missing granualaritytype option handling.

Author: tzolov

models/spring-ai-openai/src/main/java/org/springframework/ai/openai/OpenAiAudioTranscriptionClient.java

@@ -193,6 +193,7 @@ OpenAiAudioApi.TranscriptionRequest createRequestBody(AudioTranscriptionPrompt r
 			.withTemperature(options.getTemperature())
 			.withLanguage(options.getLanguage())
 			.withModel(options.getModel())
+			.withGranularityType(options.getGranularityType())
 			.build();
 
 		return audioTranscriptionRequest;
@@ -221,6 +222,8 @@ private OpenAiAudioTranscriptionOptions merge(OpenAiAudioTranscriptionOptions so
 		merged.setResponseFormat(
 				source.getResponseFormat() != null ? source.getResponseFormat() : target.getResponseFormat());
 		merged.setTemperature(source.getTemperature() != null ? source.getTemperature() : target.getTemperature());
+		merged.setGranularityType(
+				source.getGranularityType() != null ? source.getGranularityType() : target.getGranularityType());
 		return merged;
 	}
 

models/spring-ai-openai/src/test/java/org/springframework/ai/openai/TranscriptionRequestTests.java

@@ -0,0 +1,90 @@
+/*
+ * Copyright 2023 - 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
+ *
+ * https://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,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.ai.openai;
+
+import org.junit.jupiter.api.Test;
+
+import org.springframework.ai.openai.api.OpenAiAudioApi;
+import org.springframework.ai.openai.api.OpenAiAudioApi.TranscriptResponseFormat;
+import org.springframework.ai.openai.api.OpenAiAudioApi.TranscriptionRequest.GranularityType;
+import org.springframework.ai.openai.audio.transcription.AudioTranscriptionPrompt;
+import org.springframework.core.io.DefaultResourceLoader;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * @author Christian Tzolov
+ * @since 1.0.0
+ */
+public class TranscriptionRequestTests {
+
+	@Test
+	public void defaultOptions() {
+
+		var client = new OpenAiAudioTranscriptionClient(new OpenAiAudioApi("TEST"),
+				OpenAiAudioTranscriptionOptions.builder()
+					.withModel("DEFAULT_MODEL")
+					.withResponseFormat(TranscriptResponseFormat.TEXT)
+					.withLanguage("en")
+					.withPrompt("Prompt1")
+					.withGranularityType(GranularityType.WORD)
+					.withTemperature(66.6f)
+					.build());
+
+		var request = client.createRequestBody(
+				new AudioTranscriptionPrompt(new DefaultResourceLoader().getResource("classpath:/test.png")));
+
+		assertThat(request.model()).isEqualTo("DEFAULT_MODEL");
+		assertThat(request.responseFormat()).isEqualByComparingTo(TranscriptResponseFormat.TEXT);
+		assertThat(request.temperature()).isEqualTo(66.6f);
+		assertThat(request.prompt()).isEqualTo("Prompt1");
+		assertThat(request.language()).isEqualTo("en");
+		assertThat(request.granularityType()).isEqualTo(GranularityType.WORD);
+	}
+
+	@Test
+	public void runtimeOptions() {
+
+		var client = new OpenAiAudioTranscriptionClient(new OpenAiAudioApi("TEST"),
+				OpenAiAudioTranscriptionOptions.builder()
+					.withModel("DEFAULT_MODEL")
+					.withResponseFormat(TranscriptResponseFormat.TEXT)
+					.withLanguage("en")
+					.withPrompt("Prompt1")
+					.withGranularityType(GranularityType.WORD)
+					.withTemperature(66.6f)
+					.build());
+
+		var request = client.createRequestBody(
+				new AudioTranscriptionPrompt(new DefaultResourceLoader().getResource("classpath:/test.png"),
+						OpenAiAudioTranscriptionOptions.builder()
+							.withModel("RUNTIME_MODEL")
+							.withResponseFormat(TranscriptResponseFormat.JSON)
+							.withLanguage("bg")
+							.withPrompt("Prompt2")
+							.withGranularityType(GranularityType.SEGMENT)
+							.withTemperature(99.9f)
+							.build()));
+
+		assertThat(request.model()).isEqualTo("RUNTIME_MODEL");
+		assertThat(request.responseFormat()).isEqualByComparingTo(TranscriptResponseFormat.JSON);
+		assertThat(request.temperature()).isEqualTo(99.9f);
+		assertThat(request.prompt()).isEqualTo("Prompt2");
+		assertThat(request.language()).isEqualTo("bg");
+		assertThat(request.granularityType()).isEqualTo(GranularityType.SEGMENT);
+	}
+
+}