Support Retrieve file content API (#347) (#348)

* Support Retrieve file content API (#347)

* add timeout test for GetFileContent (#347)

files_test.go

@@ -7,6 +7,7 @@ import (
 
 	"context"
 	"encoding/json"
+	"errors"
 	"fmt"
 	"io"
 	"net/http"
@@ -141,3 +142,168 @@ func TestFileUploadWithNonExistentPath(t *testing.T) {
 	_, err := client.CreateFile(ctx, req)
 	checks.ErrorIs(t, err, os.ErrNotExist, "CreateFile should return error if file does not exist")
 }
+
+func TestDeleteFile(t *testing.T) {
+	server := test.NewTestServer()
+	server.RegisterHandler("/v1/files/deadbeef", func(w http.ResponseWriter, r *http.Request) {
+
+	})
+	// create the test server
+	var err error
+	ts := server.OpenAITestServer()
+	ts.Start()
+	defer ts.Close()
+
+	config := DefaultConfig(test.GetTestToken())
+	config.BaseURL = ts.URL + "/v1"
+	client := NewClientWithConfig(config)
+	ctx := context.Background()
+
+	err = client.DeleteFile(ctx, "deadbeef")
+	checks.NoError(t, err, "DeleteFile error")
+}
+
+func TestListFile(t *testing.T) {
+	server := test.NewTestServer()
+	server.RegisterHandler("/v1/files", func(w http.ResponseWriter, r *http.Request) {
+		fmt.Fprint(w, "{}")
+	})
+	// create the test server
+	var err error
+	ts := server.OpenAITestServer()
+	ts.Start()
+	defer ts.Close()
+
+	config := DefaultConfig(test.GetTestToken())
+	config.BaseURL = ts.URL + "/v1"
+	client := NewClientWithConfig(config)
+	ctx := context.Background()
+
+	_, err = client.ListFiles(ctx)
+	checks.NoError(t, err, "ListFiles error")
+}
+
+func TestGetFile(t *testing.T) {
+	server := test.NewTestServer()
+	server.RegisterHandler("/v1/files/deadbeef", func(w http.ResponseWriter, r *http.Request) {
+		fmt.Fprint(w, "{}")
+	})
+	// create the test server
+	var err error
+	ts := server.OpenAITestServer()
+	ts.Start()
+	defer ts.Close()
+
+	config := DefaultConfig(test.GetTestToken())
+	config.BaseURL = ts.URL + "/v1"
+	client := NewClientWithConfig(config)
+	ctx := context.Background()
+
+	_, err = client.GetFile(ctx, "deadbeef")
+	checks.NoError(t, err, "GetFile error")
+}
+
+func TestGetFileContent(t *testing.T) {
+	wantRespJsonl := `{"prompt": "foo", "completion": "foo"}
+{"prompt": "bar", "completion": "bar"}
+{"prompt": "baz", "completion": "baz"}
+`
+	server := test.NewTestServer()
+	server.RegisterHandler("/v1/files/deadbeef/content", func(w http.ResponseWriter, r *http.Request) {
+		// edits only accepts GET requests
+		if r.Method != http.MethodGet {
+			http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
+		}
+		fmt.Fprint(w, wantRespJsonl)
+	})
+	// create the test server
+	var err error
+	ts := server.OpenAITestServer()
+	ts.Start()
+	defer ts.Close()
+
+	config := DefaultConfig(test.GetTestToken())
+	config.BaseURL = ts.URL + "/v1"
+	client := NewClientWithConfig(config)
+	ctx := context.Background()
+
+	content, err := client.GetFileContent(ctx, "deadbeef")
+	checks.NoError(t, err, "GetFileContent error")
+	defer content.Close()
+
+	actual, _ := io.ReadAll(content)
+	if string(actual) != wantRespJsonl {
+		t.Errorf("Expected %s, got %s", wantRespJsonl, string(actual))
+	}
+}
+
+func TestGetFileContentReturnError(t *testing.T) {
+	wantMessage := "To help mitigate abuse, downloading of fine-tune training files is disabled for free accounts."
+	wantType := "invalid_request_error"
+	wantErrorResp := `{
+  "error": {
+    "message": "` + wantMessage + `",
+    "type": "` + wantType + `",
+    "param": null,
+    "code": null
+  }
+}`
+	server := test.NewTestServer()
+	server.RegisterHandler("/v1/files/deadbeef/content", func(w http.ResponseWriter, r *http.Request) {
+		w.WriteHeader(http.StatusBadRequest)
+		fmt.Fprint(w, wantErrorResp)
+	})
+	// create the test server
+	ts := server.OpenAITestServer()
+	ts.Start()
+	defer ts.Close()
+
+	config := DefaultConfig(test.GetTestToken())
+	config.BaseURL = ts.URL + "/v1"
+	client := NewClientWithConfig(config)
+	ctx := context.Background()
+
+	_, err := client.GetFileContent(ctx, "deadbeef")
+	if err == nil {
+		t.Fatal("Did not return error")
+	}
+
+	apiErr := &APIError{}
+	if !errors.As(err, &apiErr) {
+		t.Fatalf("Did not return APIError: %+v\n", apiErr)
+	}
+	if apiErr.Message != wantMessage {
+		t.Fatalf("Expected %s Message, got = %s\n", wantMessage, apiErr.Message)
+		return
+	}
+	if apiErr.Type != wantType {
+		t.Fatalf("Expected %s Type, got = %s\n", wantType, apiErr.Type)
+		return
+	}
+}
+
+func TestGetFileContentReturnTimeoutError(t *testing.T) {
+	server := test.NewTestServer()
+	server.RegisterHandler("/v1/files/deadbeef/content", func(w http.ResponseWriter, r *http.Request) {
+		time.Sleep(10 * time.Nanosecond)
+	})
+	// create the test server
+	ts := server.OpenAITestServer()
+	ts.Start()
+	defer ts.Close()
+
+	config := DefaultConfig(test.GetTestToken())
+	config.BaseURL = ts.URL + "/v1"
+	client := NewClientWithConfig(config)
+	ctx := context.Background()
+	ctx, cancel := context.WithTimeout(ctx, time.Nanosecond)
+	defer cancel()
+
+	_, err := client.GetFileContent(ctx, "deadbeef")
+	if err == nil {
+		t.Fatal("Did not return error")
+	}
+	if !os.IsTimeout(err) {
+		t.Fatal("Did not return timeout error")
+	}
+}