Add test for FindFilterFiles

Signed-off-by: Tobias Ribizel <mail@ribizel.de>

internal/pkg/util/util_test.go

@@ -0,0 +1,50 @@
+package util
+
+import (
+	"os"
+	"path/filepath"
+	"reflect"
+	"sort"
+	"testing"
+
+	"github.com/warewulf/warewulf/internal/pkg/wwlog"
+)
+
+func TryCreatePath(t *testing.T, elem ...string) {
+	err := os.MkdirAll(filepath.Join(elem...), os.ModePerm)
+	if err != nil {
+		t.Errorf("Failed creating dir: %v", err)
+		t.FailNow()
+	}
+}
+
+func Test_FindFilterFiles(t *testing.T) {
+	wwlog.SetLogLevel(wwlog.DEBUG)
+	dir, err := os.MkdirTemp(os.TempDir(), "warewulf-test")
+	if err != nil {
+		t.Errorf("Failed creating tmpdir: %v", err)
+		t.FailNow()
+	}
+	defer os.RemoveAll(dir)
+	TryCreatePath(t, dir, "boot")
+	TryCreatePath(t, dir, "usr", "local")
+	TryCreatePath(t, dir, "usr", "bin")
+	TryCreatePath(t, dir, "usr", "usr", "local")
+	TryCreatePath(t, dir, "bin")
+	TryCreatePath(t, dir, "lib")
+
+	files, err := FindFilterFiles(dir, []string{"boot", "usr", "bin"}, []string{"/b*/", "/usr/local"}, true)
+
+	if err != nil {
+		t.Errorf("FindFilerFiles failed: %v", err)
+		t.FailNow()
+	}
+
+	expected := []string{"usr", "usr/bin", "usr/usr", "usr/usr/local"}
+	sort.Strings(expected)
+	sort.Strings(files)
+	if !reflect.DeepEqual(files, expected) {
+		t.Errorf("expected %v, got %v", expected, files)
+		t.FailNow()
+	}
+}