1 files changed, 173 insertions, 0 deletions
diff --git a/internal/trash/trash_test.go b/internal/trash/trash_test.go
new file mode 100644
index 0000000..24f4ea8
--- /dev/null
+++ b/internal/trash/trash_test.go
@@ -0,0 +1,173 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+package trash
+
+import (
+	"errors"
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+)
+
+// sandbox points XDG_DATA_HOME at a temporary tree, so the real Trash is
+// never touched.
+func sandbox(t *testing.T) string {
+	t.Helper()
+	h := t.TempDir()
+	t.Setenv("HOME", h)
+	t.Setenv("XDG_DATA_HOME", filepath.Join(h, "share"))
+	t.Setenv("XDG_CONFIG_HOME", "")
+	t.Setenv("XDG_STATE_HOME", "")
+	t.Setenv("XDG_CACHE_HOME", "")
+	return h
+}
+
+func write(t *testing.T, path, content string) {
+	t.Helper()
+	if err := os.MkdirAll(filepath.Dir(path), 0o755); err != nil {
+		t.Fatal(err)
+	}
+	if err := os.WriteFile(path, []byte(content), 0o644); err != nil {
+		t.Fatal(err)
+	}
+}
+
+func TestPutWritesBothParts(t *testing.T) {
+	h := sandbox(t)
+	src := filepath.Join(h, "dl", "old report.pdf")
+	write(t, src, "pdf")
+
+	entry, err := Put(src)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if entry != "old report.pdf" {
+		t.Errorf("entry = %q, want the base name", entry)
+	}
+	if _, err := os.Stat(src); !os.IsNotExist(err) {
+		t.Error("the original is still in place")
+	}
+	if b, err := os.ReadFile(filepath.Join(Dir(), "files", entry)); err != nil || string(b) != "pdf" {
+		t.Errorf("trashed content = %q, %v", b, err)
+	}
+	info, err := os.ReadFile(filepath.Join(Dir(), "info", entry+".trashinfo"))
+	if err != nil {
+		t.Fatal(err)
+	}
+	got := string(info)
+	if !strings.HasPrefix(got, "[Trash Info]\n") {
+		t.Errorf("trashinfo lacks its header:\n%s", got)
+	}
+	if !strings.Contains(got, "Path="+strings.ReplaceAll(src, " ", "%20")+"\n") {
+		t.Errorf("Path is not the absolute percent-encoded original:\n%s", got)
+	}
+	// DeletionDate is local time with no offset: 19 characters, no Z, no +.
+	for _, line := range strings.Split(got, "\n") {
+		if v, ok := strings.CutPrefix(line, "DeletionDate="); ok {
+			if len(v) != 19 || strings.ContainsAny(v, "Z+") {
+				t.Errorf("DeletionDate = %q; want local time like 2026-04-23T16:04:23", v)
+			}
+		}
+	}
+}
+
+func TestPutSuffixesOnCollision(t *testing.T) {
+	h := sandbox(t)
+	first := filepath.Join(h, "a", "x.pdf")
+	second := filepath.Join(h, "b", "x.pdf")
+	write(t, first, "one")
+	write(t, second, "two")
+
+	if _, err := Put(first); err != nil {
+		t.Fatal(err)
+	}
+	entry, err := Put(second)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if entry != "x_1.pdf" {
+		t.Fatalf("second entry = %q, want x_1.pdf", entry)
+	}
+	if b, _ := os.ReadFile(filepath.Join(Dir(), "files", "x.pdf")); string(b) != "one" {
+		t.Error("the first entry was overwritten")
+	}
+	if b, _ := os.ReadFile(filepath.Join(Dir(), "files", "x_1.pdf")); string(b) != "two" {
+		t.Error("the second entry holds the wrong content")
+	}
+	info, err := os.ReadFile(filepath.Join(Dir(), "info", "x_1.pdf.trashinfo"))
+	if err != nil {
+		t.Fatal(err)
+	}
+	wantPath := "Path=" + strings.ReplaceAll(second, " ", "%20") + "\n"
+	if !strings.Contains(string(info), wantPath) {
+		t.Errorf("x_1.pdf.trashinfo does not point at its own original %q:\n%s", second, info)
+	}
+}
+
+func TestRestoreRoundTrips(t *testing.T) {
+	h := sandbox(t)
+	src := filepath.Join(h, "dl", "zażółć gęślą.pdf")
+	write(t, src, "polish")
+
+	entry, err := Put(src)
+	if err != nil {
+		t.Fatal(err)
+	}
+	restored, err := Restore(entry)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if restored != src {
+		t.Errorf("restored to %q, want %q", restored, src)
+	}
+	if b, err := os.ReadFile(src); err != nil || string(b) != "polish" {
+		t.Errorf("content after restore = %q, %v", b, err)
+	}
+	if _, err := os.Stat(filepath.Join(Dir(), "info", entry+".trashinfo")); !os.IsNotExist(err) {
+		t.Error("the .trashinfo was left behind")
+	}
+}
+
+func TestRestoreRefusesWhenTargetExists(t *testing.T) {
+	h := sandbox(t)
+	src := filepath.Join(h, "dl", "x.pdf")
+	write(t, src, "one")
+	entry, err := Put(src)
+	if err != nil {
+		t.Fatal(err)
+	}
+	write(t, src, "something new")
+	if _, err := Restore(entry); err == nil {
+		t.Fatal("Restore overwrote a file that had taken the original path")
+	}
+	if b, _ := os.ReadFile(src); string(b) != "something new" {
+		t.Error("the file at the original path was modified")
+	}
+	if _, err := os.Stat(filepath.Join(Dir(), "files", entry)); err != nil {
+		t.Error("the trash entry was consumed by a refused restore")
+	}
+}
+
+// TestPutRefusesOtherFilesystem needs a second filesystem. /dev/shm is one on
+// Linux; the test skips where there is none.
+func TestPutRefusesOtherFilesystem(t *testing.T) {
+	sandbox(t)
+	other, err := os.MkdirTemp("/dev/shm", "krino-trash-")
+	if err != nil {
+		t.Skip("no second filesystem available:", err)
+	}
+	defer os.RemoveAll(other)
+	src := filepath.Join(other, "x.pdf")
+	write(t, src, "elsewhere")
+
+	if _, err := Put(src); !errors.Is(err, ErrOtherFilesystem) {
+		t.Fatalf("Put across filesystems: err = %v, want ErrOtherFilesystem", err)
+	}
+	if b, err := os.ReadFile(src); err != nil || string(b) != "elsewhere" {
+		t.Errorf("the file was disturbed by a refused Put: %q, %v", b, err)
+	}
+	if entries, _ := os.ReadDir(filepath.Join(Dir(), "info")); len(entries) != 0 {
+		t.Errorf("a refused Put left %d orphaned info files", len(entries))
+	}
+}