change azure engine config to modelMapper (#306)

* change azure engine config to azure modelMapper config

* Update go.mod

* Revert "Update go.mod"

This reverts commit 78d14c58f2a9ce668da43f6adbe20b60afcfe0d7.

* lint fix

* add test

* lint fix

* lint fix

* lint fix

* opt

* opt

* opt

* opt

api_internal_test.go

@@ -94,7 +94,7 @@ func TestRequestAuthHeader(t *testing.T) {
 			az.OrgID = c.OrgID
 
 			cli := NewClientWithConfig(az)
-			req, err := cli.newStreamRequest(context.Background(), "POST", "/chat/completions", nil)
+			req, err := cli.newStreamRequest(context.Background(), "POST", "/chat/completions", nil, "")
 			if err != nil {
 				t.Errorf("Failed to create request: %v", err)
 			}
@@ -109,14 +109,16 @@ func TestRequestAuthHeader(t *testing.T) {
 
 func TestAzureFullURL(t *testing.T) {
 	cases := []struct {
-		Name    string
-		BaseURL string
-		Engine  string
-		Expect  string
+		Name             string
+		BaseURL          string
+		AzureModelMapper map[string]string
+		Model            string
+		Expect           string
 	}{
 		{
 			"AzureBaseURLWithSlashAutoStrip",
 			"https://httpbin.org/",
+			nil,
 			"chatgpt-demo",
 			"https://httpbin.org/" +
 				"openai/deployments/chatgpt-demo" +
@@ -125,6 +127,7 @@ func TestAzureFullURL(t *testing.T) {
 		{
 			"AzureBaseURLWithoutSlashOK",
 			"https://httpbin.org",
+			nil,
 			"chatgpt-demo",
 			"https://httpbin.org/" +
 				"openai/deployments/chatgpt-demo" +
@@ -134,10 +137,10 @@ func TestAzureFullURL(t *testing.T) {
 
 	for _, c := range cases {
 		t.Run(c.Name, func(t *testing.T) {
-			az := DefaultAzureConfig("dummy", c.BaseURL, c.Engine)
+			az := DefaultAzureConfig("dummy", c.BaseURL)
 			cli := NewClientWithConfig(az)
 			// /openai/deployments/{engine}/chat/completions?api-version={api_version}
-			actual := cli.fullURL("/chat/completions")
+			actual := cli.fullURL("/chat/completions", c.Model)
 			if actual != c.Expect {
 				t.Errorf("Expected %s, got %s", c.Expect, actual)
 			}