Simplify tests with T.TempDir

.golangci.yml

@@ -206,6 +206,7 @@ linters:
     - tparallel # tparallel detects inappropriate usage of t.Parallel() method in your Go test codes
     - unconvert # Remove unnecessary type conversions
     - unparam # Reports unused function parameters
+    - usetesting # Reports uses of functions with replacement inside the testing package
     - wastedassign # wastedassign finds wasted assignment statements.
     - whitespace # Tool for detection of leading and trailing whitespace
     ## you may want to enable

audio_api_test.go

@@ -40,12 +40,9 @@ func TestAudio(t *testing.T) {
 
 	ctx := context.Background()
 
-	dir, cleanup := test.CreateTestDirectory(t)
-	defer cleanup()
-
 	for _, tc := range testcases {
 		t.Run(tc.name, func(t *testing.T) {
-			path := filepath.Join(dir, "fake.mp3")
+			path := filepath.Join(t.TempDir(), "fake.mp3")
 			test.CreateTestFile(t, path)
 
 			req := openai.AudioRequest{
@@ -90,12 +87,9 @@ func TestAudioWithOptionalArgs(t *testing.T) {
 
 	ctx := context.Background()
 
-	dir, cleanup := test.CreateTestDirectory(t)
-	defer cleanup()
-
 	for _, tc := range testcases {
 		t.Run(tc.name, func(t *testing.T) {
-			path := filepath.Join(dir, "fake.mp3")
+			path := filepath.Join(t.TempDir(), "fake.mp3")
 			test.CreateTestFile(t, path)
 
 			req := openai.AudioRequest{

audio_test.go

@@ -13,9 +13,7 @@ import (
 )
 
 func TestAudioWithFailingFormBuilder(t *testing.T) {
-	dir, cleanup := test.CreateTestDirectory(t)
-	defer cleanup()
-	path := filepath.Join(dir, "fake.mp3")
+	path := filepath.Join(t.TempDir(), "fake.mp3")
 	test.CreateTestFile(t, path)
 
 	req := AudioRequest{
@@ -63,9 +61,7 @@ func TestAudioWithFailingFormBuilder(t *testing.T) {
 
 func TestCreateFileField(t *testing.T) {
 	t.Run("createFileField failing file", func(t *testing.T) {
-		dir, cleanup := test.CreateTestDirectory(t)
-		defer cleanup()
-		path := filepath.Join(dir, "fake.mp3")
+		path := filepath.Join(t.TempDir(), "fake.mp3")
 		test.CreateTestFile(t, path)
 
 		req := AudioRequest{

image_api_test.go

@@ -7,6 +7,7 @@ import (
 	"io"
 	"net/http"
 	"os"
+	"path/filepath"
 	"testing"
 	"time"
 
@@ -86,24 +87,17 @@ func TestImageEdit(t *testing.T) {
 	defer teardown()
 	server.RegisterHandler("/v1/images/edits", handleEditImageEndpoint)
 
-	origin, err := os.Create("image.png")
+	origin, err := os.Create(filepath.Join(t.TempDir(), "image.png"))
 	if err != nil {
-		t.Error("open origin file error")
-		return
+		t.Fatalf("open origin file error: %v", err)
 	}
+	defer origin.Close()
 
-	mask, err := os.Create("mask.png")
+	mask, err := os.Create(filepath.Join(t.TempDir(), "mask.png"))
 	if err != nil {
-		t.Error("open mask file error")
-		return
+		t.Fatalf("open mask file error: %v", err)
 	}
-
-	defer func() {
-		mask.Close()
-		origin.Close()
-		os.Remove("mask.png")
-		os.Remove("image.png")
-	}()
+	defer mask.Close()
 
 	_, err = client.CreateEditImage(context.Background(), openai.ImageEditRequest{
 		Image:          origin,
@@ -121,16 +115,11 @@ func TestImageEditWithoutMask(t *testing.T) {
 	defer teardown()
 	server.RegisterHandler("/v1/images/edits", handleEditImageEndpoint)
 
-	origin, err := os.Create("image.png")
+	origin, err := os.Create(filepath.Join(t.TempDir(), "image.png"))
 	if err != nil {
-		t.Error("open origin file error")
-		return
+		t.Fatalf("open origin file error: %v", err)
 	}
-
-	defer func() {
-		origin.Close()
-		os.Remove("image.png")
-	}()
+	defer origin.Close()
 
 	_, err = client.CreateEditImage(context.Background(), openai.ImageEditRequest{
 		Image:          origin,
@@ -178,16 +167,11 @@ func TestImageVariation(t *testing.T) {
 	defer teardown()
 	server.RegisterHandler("/v1/images/variations", handleVariateImageEndpoint)
 
-	origin, err := os.Create("image.png")
+	origin, err := os.Create(filepath.Join(t.TempDir(), "image.png"))
 	if err != nil {
-		t.Error("open origin file error")
-		return
+		t.Fatalf("open origin file error: %v", err)
 	}
-
-	defer func() {
-		origin.Close()
-		os.Remove("image.png")
-	}()
+	defer origin.Close()
 
 	_, err = client.CreateVariImage(context.Background(), openai.ImageVariRequest{
 		Image:          origin,

internal/form_builder_test.go

@@ -1,7 +1,6 @@
 package openai //nolint:testpackage // testing private field
 
 import (
-	"github.com/sashabaranov/go-openai/internal/test"
 	"github.com/sashabaranov/go-openai/internal/test/checks"
 
 	"bytes"
@@ -20,31 +19,23 @@ func (*failingWriter) Write([]byte) (int, error) {
 }
 
 func TestFormBuilderWithFailingWriter(t *testing.T) {
-	dir, cleanup := test.CreateTestDirectory(t)
-	defer cleanup()
-
-	file, err := os.CreateTemp(dir, "")
+	file, err := os.CreateTemp(t.TempDir(), "")
 	if err != nil {
-		t.Errorf("Error creating tmp file: %v", err)
+		t.Fatalf("Error creating tmp file: %v", err)
 	}
 	defer file.Close()
-	defer os.Remove(file.Name())
 
 	builder := NewFormBuilder(&failingWriter{})
 	err = builder.CreateFormFile("file", file)
 	checks.ErrorIs(t, err, errMockFailingWriterError, "formbuilder should return error if writer fails")
 }
 
 func TestFormBuilderWithClosedFile(t *testing.T) {
-	dir, cleanup := test.CreateTestDirectory(t)
-	defer cleanup()
-
-	file, err := os.CreateTemp(dir, "")
+	file, err := os.CreateTemp(t.TempDir(), "")
 	if err != nil {
-		t.Errorf("Error creating tmp file: %v", err)
+		t.Fatalf("Error creating tmp file: %v", err)
 	}
 	file.Close()
-	defer os.Remove(file.Name())
 
 	body := &bytes.Buffer{}
 	builder := NewFormBuilder(body)

internal/test/helpers.go

@@ -19,16 +19,6 @@ func CreateTestFile(t *testing.T, path string) {
 	file.Close()
 }
 
-// CreateTestDirectory creates a temporary folder which will be deleted when cleanup is called.
-func CreateTestDirectory(t *testing.T) (path string, cleanup func()) {
-	t.Helper()
-
-	path, err := os.MkdirTemp(os.TempDir(), "")
-	checks.NoError(t, err)
-
-	return path, func() { os.RemoveAll(path) }
-}
-
 // TokenRoundTripper is a struct that implements the RoundTripper
 // interface, specifically to handle the authentication token by adding a token
 // to the request header. We need this because the API requires that each

openai_test.go

@@ -31,7 +31,7 @@ func setupAzureTestServer() (client *openai.Client, server *test.ServerTest, tea
 // This function approximates based on the rule of thumb stated by OpenAI:
 // https://beta.openai.com/tokenizer
 //
-// TODO: implement an actual tokenizer for GPT-3 and Codex (once available)
+// TODO: implement an actual tokenizer for GPT-3 and Codex (once available).
 func numTokens(s string) int {
 	return int(float32(len(s)) / 4)
 }

speech_test.go

@@ -21,10 +21,8 @@ func TestSpeechIntegration(t *testing.T) {
 	defer teardown()
 
 	server.RegisterHandler("/v1/audio/speech", func(w http.ResponseWriter, r *http.Request) {
-		dir, cleanup := test.CreateTestDirectory(t)
-		path := filepath.Join(dir, "fake.mp3")
+		path := filepath.Join(t.TempDir(), "fake.mp3")
 		test.CreateTestFile(t, path)
-		defer cleanup()
 
 		// audio endpoints only accept POST requests
 		if r.Method != "POST" {