test: add PermissionCache unit tests (Grant, Check, Revoke, parent path)

pkg/tools/permission_test.go

@@ -1,6 +1,7 @@
 package tools
 
 import (
+	"context"
 	"testing"
 )
 
@@ -11,3 +12,83 @@ func TestPermissionCache_Check_NoPermission(t *testing.T) {
 		t.Errorf("Expected empty string, got %s", result)
 	}
 }
+
+func TestRequestPermissionTool_Name(t *testing.T) {
+	pc := NewPermissionCache()
+	tool := NewRequestPermissionTool(pc)
+
+	if tool.Name() != "request_permission" {
+		t.Errorf("Expected 'request_permission', got %s", tool.Name())
+	}
+}
+
+func TestRequestPermissionTool_Execute(t *testing.T) {
+	pc := NewPermissionCache()
+	tool := NewRequestPermissionTool(pc)
+
+	result := tool.Execute(context.Background(), map[string]any{
+		"path":    "/desktop",
+		"command": "ls /desktop",
+	})
+
+	if result == nil {
+		t.Fatal("Expected non-nil result")
+	}
+	if result.ForUser == "" {
+		t.Error("Expected non-empty ForUser message")
+	}
+	if result.ForLLM == "" {
+		t.Error("Expected non-empty ForLLM message")
+	}
+}
+
+func TestPermissionCache_GrantAndCheck(t *testing.T) {
+	pc := NewPermissionCache()
+	pc.Grant("/desktop", "session")
+
+	result := pc.Check("/desktop")
+	if result != "session" {
+		t.Errorf("Expected 'session', got %s", result)
+	}
+}
+
+func TestPermissionCache_ParentPathMatch(t *testing.T) {
+	pc := NewPermissionCache()
+	pc.Grant("/desktop", "session")
+
+	// Child path should match parent's "session" permission
+	result := pc.Check("/desktop/folder")
+	if result != "session" {
+		t.Errorf("Expected 'session' for child path, got %s", result)
+	}
+}
+
+func TestPermissionCache_Revoke(t *testing.T) {
+	pc := NewPermissionCache()
+	pc.Grant("/desktop", "session")
+	pc.Revoke("/desktop")
+
+	result := pc.Check("/desktop")
+	if result != "" {
+		t.Errorf("Expected empty after revoke, got %s", result)
+	}
+}
+
+func TestPermissionCache_Denied(t *testing.T) {
+	pc := NewPermissionCache()
+	pc.Grant("/desktop", "denied")
+
+	result := pc.Check("/desktop")
+	if result != "denied" {
+		t.Errorf("Expected 'denied', got %s", result)
+	}
+}
+
+func TestPermissionCache_Empty(t *testing.T) {
+	pc := NewPermissionCache()
+
+	result := pc.Check("/anything")
+	if result != "" {
+		t.Errorf("Expected empty string, got %s", result)
+	}
+}