unix: use slices.{Equal,Sort} in tests

Same as CL 587655 and CL 690475 did for package syscall tests.

Change-Id: Ie3c8726a4e2c859b5d7992ea1baec14083b9fdba
Reviewed-on: https://go-review.googlesource.com/c/sys/+/708558
Reviewed-by: Junyang Shao <shaojunyang@google.com>
Reviewed-by: Florian Lehner <lehner.florian86@gmail.com>
Reviewed-by: Carlos Amedee <carlos@golang.org>
Auto-Submit: Tobias Klauser <tobias.klauser@gmail.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Sean Liao <sean@liao.dev>

unix/dirent_test.go

diff --git a/unix/dirent_test.go b/unix/dirent_test.go
index f209fa1..ce80488 100644
--- a/unix/dirent_test.go
+++ b/unix/dirent_test.go
@@ -12,7 +12,7 @@
 	"os"
 	"path/filepath"
 	"runtime"
-	"sort"
+	"slices"
 	"strconv"
 	"strings"
 	"testing"
@@ -72,7 +72,7 @@
 		}
 	}
 
-	sort.Strings(names)
+	slices.Sort(names)
 	t.Logf("names: %q", names)
 
 	if len(names) != 10 {
@@ -145,9 +145,9 @@
 	}
 
 	// Check results
-	sort.Strings(files)
-	sort.Strings(files2)
-	if strings.Join(files, "|") != strings.Join(files2, "|") {
+	slices.Sort(files)
+	slices.Sort(files2)
+	if !slices.Equal(files, files2) {
 		t.Errorf("bad file list: want\n%q\ngot\n%q", files, files2)
 	}
 }

unix/getdirentries_test.go

diff --git a/unix/getdirentries_test.go b/unix/getdirentries_test.go
index ca94a4c..c8a184b 100644
--- a/unix/getdirentries_test.go
+++ b/unix/getdirentries_test.go
@@ -10,8 +10,7 @@
 	"fmt"
 	"os"
 	"path/filepath"
-	"sort"
-	"strings"
+	"slices"
 	"testing"
 
 	"golang.org/x/sys/unix"
@@ -71,9 +70,9 @@
 		}
 	}
 
-	sort.Strings(names)
-	sort.Strings(names2)
-	if strings.Join(names, ":") != strings.Join(names2, ":") {
+	slices.Sort(names)
+	slices.Sort(names2)
+	if !slices.Equal(names, names2) {
 		t.Errorf("names don't match\n names: %q\nnames2: %q", names, names2)
 	}
 }