1 files changed, 157 insertions, 0 deletions
diff --git a/internal/askcli/task_selector_test.go b/internal/askcli/task_selector_test.go
new file mode 100644
index 0000000..7e60665
--- /dev/null
+++ b/internal/askcli/task_selector_test.go
@@ -0,0 +1,157 @@
+package askcli
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"io"
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+	"time"
+)
+
+func TestResolveTaskSelectorFromCache_TouchesAliasEntry(t *testing.T) {
+	dir := t.TempDir()
+	oldNow := nowTaskAliasCache
+	oldRoot := taskAliasCacheRoot
+	nowTaskAliasCache = func() time.Time { return time.Date(2026, 3, 26, 12, 0, 0, 0, time.UTC) }
+	taskAliasCacheRoot = func() (string, error) { return filepath.Join(dir, "hexai"), nil }
+	defer func() {
+		nowTaskAliasCache = oldNow
+		taskAliasCacheRoot = oldRoot
+	}()
+
+	writeTaskAliasCacheForTest(t, taskAliasCache{
+		NextID: 2,
+		Entries: []taskAliasCacheEntry{
+			{
+				UUID:           "task-uuid-1",
+				Alias:          "0",
+				CreatedAt:      time.Date(2026, 3, 20, 12, 0, 0, 0, time.UTC),
+				LastAccessedAt: time.Date(2026, 3, 21, 12, 0, 0, 0, time.UTC),
+			},
+		},
+	})
+
+	resolved, err := resolveTaskSelectorFromCache("0", true)
+	if err != nil {
+		t.Fatalf("resolveTaskSelectorFromCache returned error: %v", err)
+	}
+	if !resolved.UsedAlias || resolved.UUID != "task-uuid-1" {
+		t.Fatalf("resolved = %+v, want alias hit for task-uuid-1", resolved)
+	}
+
+	cache := readTaskAliasCacheSnapshot(t)
+	entry := findTaskAliasEntry(t, cache, "task-uuid-1")
+	if got := entry.LastAccessedAt; !got.Equal(nowTaskAliasCache()) {
+		t.Fatalf("LastAccessedAt = %s, want %s", got, nowTaskAliasCache())
+	}
+}
+
+func TestResolveTaskSelectorFromCache_MissingAlias(t *testing.T) {
+	dir := t.TempDir()
+	oldRoot := taskAliasCacheRoot
+	taskAliasCacheRoot = func() (string, error) { return filepath.Join(dir, "hexai"), nil }
+	defer func() { taskAliasCacheRoot = oldRoot }()
+
+	_, err := resolveTaskSelectorFromCache("a", true)
+	if err == nil {
+		t.Fatal("resolveTaskSelectorFromCache returned nil error, want missing alias failure")
+	}
+	if !strings.Contains(err.Error(), `did not match a known alias`) {
+		t.Fatalf("err = %q, want missing alias message", err)
+	}
+}
+
+func TestResolveTaskSelectorFromCache_AmbiguousSelector(t *testing.T) {
+	dir := t.TempDir()
+	oldRoot := taskAliasCacheRoot
+	oldNow := nowTaskAliasCache
+	taskAliasCacheRoot = func() (string, error) { return filepath.Join(dir, "hexai"), nil }
+	nowTaskAliasCache = func() time.Time { return time.Date(2026, 3, 26, 12, 0, 0, 0, time.UTC) }
+	defer func() {
+		taskAliasCacheRoot = oldRoot
+		nowTaskAliasCache = oldNow
+	}()
+
+	writeTaskAliasCacheForTest(t, taskAliasCache{
+		NextID: 11,
+		Entries: []taskAliasCacheEntry{
+			{UUID: "a", Alias: "1", CreatedAt: nowTaskAliasCache()},
+			{UUID: "task-uuid-2", Alias: "a", CreatedAt: nowTaskAliasCache()},
+		},
+	})
+
+	_, err := resolveTaskSelectorFromCache("a", true)
+	if err == nil {
+		t.Fatal("resolveTaskSelectorFromCache returned nil error, want ambiguity")
+	}
+	if !strings.Contains(err.Error(), "ambiguous") {
+		t.Fatalf("err = %q, want ambiguity message", err)
+	}
+}
+
+func TestHandleInfo_StaleAlias(t *testing.T) {
+	dir := t.TempDir()
+	oldRoot := taskAliasCacheRoot
+	oldNow := nowTaskAliasCache
+	taskAliasCacheRoot = func() (string, error) { return filepath.Join(dir, "hexai"), nil }
+	nowTaskAliasCache = func() time.Time { return time.Date(2026, 3, 26, 12, 0, 0, 0, time.UTC) }
+	defer func() {
+		taskAliasCacheRoot = oldRoot
+		nowTaskAliasCache = oldNow
+	}()
+
+	writeTaskAliasCacheForTest(t, taskAliasCache{
+		NextID: 1,
+		Entries: []taskAliasCacheEntry{
+			{UUID: "task-uuid-1", Alias: "0", CreatedAt: nowTaskAliasCache()},
+		},
+	})
+
+	d := NewDispatcher(&spyRunner{runFn: func(ctx context.Context, args []string, stdin io.Reader, stdout, stderr io.Writer) (int, error) {
+		if len(args) == 2 && args[0] == "uuid:task-uuid-1" && args[1] == "export" {
+			io.WriteString(stdout, "[]")
+		}
+		return 0, nil
+	}})
+
+	var stdout, stderr bytes.Buffer
+	code, _ := d.Dispatch(context.Background(), []string{"info", "0"}, nil, &stdout, &stderr)
+	if code != 1 {
+		t.Fatalf("info code = %d, want 1 for stale alias", code)
+	}
+	if !strings.Contains(stderr.String(), `alias "0" is stale`) {
+		t.Fatalf("stderr = %q, want stale alias message", stderr.String())
+	}
+}
+
+func writeTaskAliasCacheForTest(t *testing.T, cache taskAliasCache) {
+	t.Helper()
+	path, err := taskAliasCachePath()
+	if err != nil {
+		t.Fatalf("taskAliasCachePath: %v", err)
+	}
+	if err := cache.save(path); err != nil {
+		t.Fatalf("cache.save: %v", err)
+	}
+}
+
+func readTaskAliasCacheSnapshot(t *testing.T) taskAliasCache {
+	t.Helper()
+	path, err := taskAliasCachePath()
+	if err != nil {
+		t.Fatalf("taskAliasCachePath: %v", err)
+	}
+	data, err := os.ReadFile(path)
+	if err != nil {
+		t.Fatalf("os.ReadFile(%s): %v", path, err)
+	}
+	var cache taskAliasCache
+	if err := json.Unmarshal(data, &cache); err != nil {
+		t.Fatalf("json.Unmarshal: %v", err)
+	}
+	return cache
+}