test: use t.tmpdir to create temp directory in tests (#5508)

* refactor: use t.tmpdir to create temp directory in tests

replace manual mkdir+remove+error-handling with t.tmpdir

* lint: fix linter issues

internal/pkg/agent/application/filelock/locker_test.go

@@ -5,7 +5,6 @@
 package filelock
 
 import (
-	"os"
 	"testing"
 
 	"github.com/stretchr/testify/assert"
@@ -15,8 +14,7 @@ import (
 const testLockFile = "test.lock"
 
 func TestAppLocker(t *testing.T) {
-	tmp, _ := os.MkdirTemp("", "locker")
-	defer os.RemoveAll(tmp)
+	tmp := t.TempDir()
 
 	locker1 := NewAppLocker(tmp, testLockFile)
 	locker2 := NewAppLocker(tmp, testLockFile)

internal/pkg/agent/application/gateway/fleet/fleet_gateway_test.go

@@ -12,7 +12,6 @@ import (
 	"io"
 	"net/http"
 	"net/url"
-	"os"
 	"path/filepath"
 	"sync"
 	"testing"
@@ -498,19 +497,14 @@ func runFleetGateway(ctx context.Context, g coordinator.FleetGateway) <-chan err
 }
 
 func newStateStore(t *testing.T, log *logger.Logger) *store.StateStore {
-	dir, err := os.MkdirTemp("", "fleet-gateway-unit-test")
-	require.NoError(t, err)
+	dir := t.TempDir()
 
 	filename := filepath.Join(dir, "state.enc")
 	diskStore, err := storage.NewDiskStore(filename)
 	require.NoError(t, err)
 	stateStore, err := store.NewStateStore(log, diskStore)
 	require.NoError(t, err)
 
-	t.Cleanup(func() {
-		os.RemoveAll(dir)
-	})
-
 	return stateStore
 }
 

internal/pkg/agent/application/secret/secret_test.go

@@ -6,7 +6,6 @@ package secret
 
 import (
 	"context"
-	"os"
 	"path/filepath"
 	"testing"
 	"time"
@@ -67,6 +66,4 @@ func TestCreate(t *testing.T) {
 			t.Fatal(err)
 		}
 	}
-
-	os.RemoveAll(filepath.Dir(getTestVaultPath(t)))
 }

internal/pkg/agent/storage/storage_test.go

@@ -28,10 +28,9 @@ func TestReplaceOrRollbackStore(t *testing.T) {
 	failure := NewHandlerStore(func(_ io.Reader) error { return errors.New("fail") })
 
 	t.Run("when the save is successful with target and source don't match", func(t *testing.T) {
-		target, err := genFile(oldContent)
+		target, err := genFile(t, oldContent)
 		require.NoError(t, err)
 		dir := filepath.Dir(target)
-		defer os.RemoveAll(dir)
 
 		requireFilesCount(t, dir, 1)
 
@@ -53,10 +52,9 @@ func TestReplaceOrRollbackStore(t *testing.T) {
 	})
 
 	t.Run("when save is not successful", func(t *testing.T) {
-		target, err := genFile(oldContent)
+		target, err := genFile(t, oldContent)
 		require.NoError(t, err)
 		dir := filepath.Dir(target)
-		defer os.RemoveAll(dir)
 
 		requireFilesCount(t, dir, 1)
 
@@ -77,10 +75,9 @@ func TestReplaceOrRollbackStore(t *testing.T) {
 	})
 
 	t.Run("when save is successful with target and source content match", func(t *testing.T) {
-		target, err := genFile(replaceWith)
+		target, err := genFile(t, replaceWith)
 		require.NoError(t, err)
 		dir := filepath.Dir(target)
-		defer os.RemoveAll(dir)
 
 		requireFilesCount(t, dir, 1)
 
@@ -104,11 +101,10 @@ func TestReplaceOrRollbackStore(t *testing.T) {
 	t.Run("when replace is skipped due to target already containing source content", func(t *testing.T) {
 		yamlTarget := []byte("fleet:\n  enabled: true\nother: value\n")
 		yamlReplaceWith := []byte("#This comment is left out\nfleet:\n  enabled: true\n")
-		target, err := genFile(yamlTarget)
+		target, err := genFile(t, yamlTarget)
 
 		require.NoError(t, err)
 		dir := filepath.Dir(target)
-		defer os.RemoveAll(dir)
 
 		requireFilesCount(t, dir, 1)
 
@@ -141,9 +137,8 @@ func TestReplaceOrRollbackStore(t *testing.T) {
 
 func TestDiskStore(t *testing.T) {
 	t.Run("when the target file already exists", func(t *testing.T) {
-		target, err := genFile([]byte("hello world"))
+		target, err := genFile(t, []byte("hello world"))
 		require.NoError(t, err)
-		defer os.Remove(target)
 		d, err := NewDiskStore(target)
 		require.NoError(t, err)
 
@@ -159,9 +154,7 @@ func TestDiskStore(t *testing.T) {
 	})
 
 	t.Run("when the target do no exist", func(t *testing.T) {
-		dir, err := os.MkdirTemp("", "configs")
-		require.NoError(t, err)
-		defer os.Remove(dir)
+		dir := t.TempDir()
 
 		target := filepath.Join(dir, "hello.txt")
 		d, err := NewDiskStore(target)
@@ -180,7 +173,7 @@ func TestDiskStore(t *testing.T) {
 
 	t.Run("return an io.ReadCloser to the target file", func(t *testing.T) {
 		msg := []byte("bonjour la famille")
-		target, err := genFile(msg)
+		target, err := genFile(t, msg)
 		require.NoError(t, err)
 
 		d, err := NewDiskStore(target)
@@ -197,11 +190,8 @@ func TestDiskStore(t *testing.T) {
 	})
 }
 
-func genFile(b []byte) (string, error) {
-	dir, err := os.MkdirTemp("", "configs")
-	if err != nil {
-		return "", err
-	}
+func genFile(t *testing.T, b []byte) (string, error) {
+	dir := t.TempDir()
 
 	f, err := os.CreateTemp(dir, "config-")
 	if err != nil {

internal/pkg/config/config_test.go

@@ -42,9 +42,7 @@ func TestInputsResolveNOOP(t *testing.T) {
 		},
 	}
 
-	tmp, err := os.MkdirTemp("", "config")
-	require.NoError(t, err)
-	defer os.RemoveAll(tmp)
+	tmp := t.TempDir()
 
 	cfgPath := filepath.Join(tmp, "config.yml")
 	dumpToYAML(t, cfgPath, contents)
@@ -95,9 +93,7 @@ func TestCommaParsing(t *testing.T) {
 }
 
 func testLoadFiles(t *testing.T) {
-	tmp, err := os.MkdirTemp("", "watch")
-	require.NoError(t, err)
-	defer os.RemoveAll(tmp)
+	tmp := t.TempDir()
 
 	f1 := filepath.Join(tmp, "1.yml")
 	dumpToYAML(t, f1, map[string]interface{}{

internal/pkg/dir/discover_test.go

@@ -58,8 +58,7 @@ func TestDiscover(t *testing.T) {
 
 func withFiles(files []string, fn func(dst string, t *testing.T)) func(t *testing.T) {
 	return func(t *testing.T) {
-		tmp, _ := os.MkdirTemp("", "watch")
-		defer os.RemoveAll(tmp)
+		tmp := t.TempDir()
 
 		for _, file := range files {
 			path := filepath.Join(tmp, file)

internal/pkg/filewatcher/watcher_test.go

@@ -23,9 +23,7 @@ func TestWatch(t *testing.T) {
 	}))
 
 	t.Run("newly added files are discovered", withWatch(func(t *testing.T, w *Watch) {
-		tmp, err := os.MkdirTemp("", "watch")
-		require.NoError(t, err)
-		defer os.RemoveAll(tmp)
+		tmp := t.TempDir()
 
 		path := filepath.Join(tmp, "hello.txt")
 		empty, err := os.Create(path)
@@ -42,9 +40,7 @@ func TestWatch(t *testing.T) {
 	}))
 
 	t.Run("ignore old files", withWatch(func(t *testing.T, w *Watch) {
-		tmp, err := os.MkdirTemp("", "watch")
-		require.NoError(t, err)
-		defer os.RemoveAll(tmp)
+		tmp := t.TempDir()
 
 		path := filepath.Join(tmp, "hello.txt")
 		empty, err := os.Create(path)
@@ -67,9 +63,7 @@ func TestWatch(t *testing.T) {
 	}))
 
 	t.Run("can unwatch a watched file", withWatch(func(t *testing.T, w *Watch) {
-		tmp, err := os.MkdirTemp("", "watch")
-		require.NoError(t, err)
-		defer os.RemoveAll(tmp)
+		tmp := t.TempDir()
 
 		path := filepath.Join(tmp, "hello.txt")
 		empty, err := os.Create(path)
@@ -96,7 +90,7 @@ func TestWatch(t *testing.T) {
 		w.Unwatch(path)
 
 		// Add new content to the file.
-		os.WriteFile(path, []byte("heeeelo"), 0644)
+		assert.NoError(t, os.WriteFile(path, []byte("heeeelo"), 0644))
 
 		// Should not find the file.
 		r, u, err = w.scan()
@@ -106,9 +100,7 @@ func TestWatch(t *testing.T) {
 	}))
 
 	t.Run("can returns the list of watched files", withWatch(func(t *testing.T, w *Watch) {
-		tmp, err := os.MkdirTemp("", "watch")
-		require.NoError(t, err)
-		defer os.RemoveAll(tmp)
+		tmp := t.TempDir()
 
 		path := filepath.Join(tmp, "hello.txt")
 		empty, err := os.Create(path)
@@ -124,9 +116,7 @@ func TestWatch(t *testing.T) {
 	}))
 
 	t.Run("update returns updated, unchanged and watched files", withWatch(func(t *testing.T, w *Watch) {
-		tmp, err := os.MkdirTemp("", "watch")
-		require.NoError(t, err)
-		defer os.RemoveAll(tmp)
+		tmp := t.TempDir()
 
 		path1 := filepath.Join(tmp, "hello-1.txt")
 		empty, err := os.Create(path1)
@@ -151,7 +141,8 @@ func TestWatch(t *testing.T) {
 		w.Watch(path3)
 
 		// Set initial state
-		w.Update()
+		_, err = w.Update()
+		require.NoError(t, err)
 
 		// Reset watched files.
 		w.Reset()
@@ -165,7 +156,8 @@ func TestWatch(t *testing.T) {
 		// Add new content to the file.
 		f, err := os.OpenFile(path3, os.O_APPEND|os.O_WRONLY, 0600)
 		require.NoError(t, err)
-		f.Write([]byte("more-hello"))
+		_, err = f.Write([]byte("more-hello"))
+		require.NoError(t, err)
 		require.NoError(t, f.Sync())
 		f.Close()
 
@@ -183,9 +175,7 @@ func TestWatch(t *testing.T) {
 	}))
 
 	t.Run("should cleanup files that disapear", withWatch(func(t *testing.T, w *Watch) {
-		tmp, err := os.MkdirTemp("", "watch")
-		require.NoError(t, err)
-		defer os.RemoveAll(tmp)
+		tmp := t.TempDir()
 
 		path1 := filepath.Join(tmp, "hello.txt")
 		empty, err := os.Create(path1)
@@ -200,9 +190,7 @@ func TestWatch(t *testing.T) {
 	}))
 
 	t.Run("should allow to invalidate the cache ", withWatch(func(t *testing.T, w *Watch) {
-		tmp, err := os.MkdirTemp("", "watch")
-		require.NoError(t, err)
-		defer os.RemoveAll(tmp)
+		tmp := t.TempDir()
 
 		path1 := filepath.Join(tmp, "hello.txt")
 		empty, err := os.Create(path1)

pkg/component/runtime/conn_info_server_test.go

@@ -11,7 +11,6 @@ import (
 	"io"
 	"net"
 	"net/url"
-	"os"
 	"runtime"
 	"syscall"
 	"testing"
@@ -92,11 +91,7 @@ func getAddress(dir string, isLocal bool) string {
 }
 
 func runTests(t *testing.T, fn func(*testing.T, string)) {
-	sockdir, err := os.MkdirTemp("", "")
-	if err != nil {
-		t.Fatal(err)
-	}
-	defer os.RemoveAll(sockdir)
+	sockdir := t.TempDir()
 
 	tests := []struct {
 		name    string

pkg/packer/packer_test.go

@@ -24,9 +24,7 @@ func TestPacker(t *testing.T) {
 
 	withFiles := func(test tt, fn func(pattern []string, t *testing.T)) func(t *testing.T) {
 		return func(t *testing.T) {
-			d, err := os.MkdirTemp("", "packer")
-			require.NoError(t, err)
-			defer os.RemoveAll(d)
+			d := t.TempDir()
 
 			for f, v := range test.content {
 				path := filepath.Join(d, f)