feat!: add missing api key error

BREAKING CHANGE: `APIError` is renamed to `ApiError`.

tests/v1_client_chat_test.rs

@@ -6,12 +6,7 @@ use mistralai_client::v1::{
 };
 
 #[test]
-fn test_chat_completion() {
-    extern crate dotenv;
-
-    use dotenv::dotenv;
-    dotenv().ok();
-
+fn test_client_chat() {
     let client = Client::new(None, None, None, None);
 
     let model = Model::OpenMistral7b;

tests/v1_client_embeddings_test.rs

@@ -2,12 +2,7 @@ use jrest::expect;
 use mistralai_client::v1::{client::Client, constants::EmbedModel};
 
 #[test]
-fn test_embeddings() {
-    extern crate dotenv;
-
-    use dotenv::dotenv;
-    dotenv().ok();
-
+fn test_client_embeddings() {
     let client: Client = Client::new(None, None, None, None);
 
     let model = EmbedModel::MistralEmbed;

tests/v1_client_list_models_test.rs

@@ -2,12 +2,7 @@ use jrest::expect;
 use mistralai_client::v1::client::Client;
 
 #[test]
-fn test_list_models() {
-    extern crate dotenv;
-
-    use dotenv::dotenv;
-    dotenv().ok();
-
+fn test_client_list_models() {
     let client = Client::new(None, None, None, None);
 
     let response = client.list_models().unwrap();

tests/v1_client_new_test.rs

@@ -4,6 +4,7 @@ use mistralai_client::v1::client::Client;
 #[test]
 fn test_client_new_with_none_params() {
     let maybe_original_mistral_api_key = std::env::var("MISTRAL_API_KEY").ok();
+    std::env::remove_var("MISTRAL_API_KEY");
     std::env::set_var("MISTRAL_API_KEY", "test_api_key_from_env");
 
     let client = Client::new(None, None, None, None);
@@ -24,6 +25,7 @@ fn test_client_new_with_none_params() {
 #[test]
 fn test_client_new_with_all_params() {
     let maybe_original_mistral_api_key = std::env::var("MISTRAL_API_KEY").ok();
+    std::env::remove_var("MISTRAL_API_KEY");
     std::env::set_var("MISTRAL_API_KEY", "test_api_key_from_env");
 
     let api_key = Some("test_api_key_from_param".to_string());
@@ -50,3 +52,19 @@ fn test_client_new_with_all_params() {
         None => std::env::remove_var("MISTRAL_API_KEY"),
     }
 }
+
+#[test]
+#[should_panic]
+fn test_client_new_with_missing_api_key() {
+    let maybe_original_mistral_api_key = std::env::var("MISTRAL_API_KEY").ok();
+    std::env::remove_var("MISTRAL_API_KEY");
+
+    let _client = Client::new(None, None, None, None);
+
+    match maybe_original_mistral_api_key {
+        Some(original_mistral_api_key) => {
+            std::env::set_var("MISTRAL_API_KEY", original_mistral_api_key)
+        }
+        None => std::env::remove_var("MISTRAL_API_KEY"),
+    }
+}