feat: add client.chat_async() method

tests/v1_client_chat_async_test.rs

@@ -0,0 +1,38 @@
+use jrest::expect;
+use mistralai_client::v1::{
+    chat_completion::{ChatCompletionMessage, ChatCompletionMessageRole, ChatCompletionParams},
+    client::Client,
+    constants::Model,
+};
+
+#[tokio::test]
+async fn test_client_chat_async() {
+    let client = Client::new(None, None, None, None).unwrap();
+
+    let model = Model::OpenMistral7b;
+    let messages = vec![ChatCompletionMessage {
+        role: ChatCompletionMessageRole::user,
+        content: "Just guess the next word: \"Eiffel ...\"?".to_string(),
+    }];
+    let options = ChatCompletionParams {
+        temperature: Some(0.0),
+        random_seed: Some(42),
+        ..Default::default()
+    };
+
+    let response = client
+        .chat_async(model, messages, Some(options))
+        .await
+        .unwrap();
+
+    expect!(response.model).to_be(Model::OpenMistral7b);
+    expect!(response.object).to_be("chat.completion".to_string());
+    expect!(response.choices.len()).to_be(1);
+    expect!(response.choices[0].index).to_be(0);
+    expect!(response.choices[0].message.role.clone()).to_be(ChatCompletionMessageRole::assistant);
+    expect!(response.choices[0].message.content.clone())
+        .to_be("Tower. The Eiffel Tower is a famous landmark in Paris, France.".to_string());
+    expect!(response.usage.prompt_tokens).to_be_greater_than(0);
+    expect!(response.usage.completion_tokens).to_be_greater_than(0);
+    expect!(response.usage.total_tokens).to_be_greater_than(0);
+}