Add reply to code review (#978)

Follow https://gitea.com/gitea/go-sdk/pulls/784

Reviewed-on: https://gitea.com/gitea/tea/pulls/978

cmd/pulls/reply_test.go

@@ -0,0 +1,70 @@
+// Copyright 2026 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package pulls
+
+import (
+	"context"
+	"testing"
+
+	"gitea.dev/tea/modules/config"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestReply(t *testing.T) {
+	config.SetConfigForTesting(config.LocalConfig{
+		Logins: []config.Login{{
+			Name:    "testLogin",
+			URL:     "https://gitea.example.com",
+			Token:   "test-token",
+			User:    "testUser",
+			Default: true,
+		}},
+	})
+	t.Cleanup(func() {
+		config.SetConfigForTesting(config.LocalConfig{})
+	})
+
+	tests := []struct {
+		name        string
+		args        []string
+		wantErr     bool
+		errContains string
+	}{
+		{
+			name:        "no arguments",
+			args:        []string{},
+			wantErr:     true,
+			errContains: "pull request index and comment ID are required",
+		},
+		{
+			name:        "missing comment id",
+			args:        []string{"1"},
+			wantErr:     true,
+			errContains: "pull request index and comment ID are required",
+		},
+		{
+			name:        "pull index and comment id",
+			args:        []string{"1", "2"},
+			wantErr:     true,
+			errContains: "no reply content provided",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			cmd := CmdPullsReply
+			args := append([]string{"reply"}, tt.args...)
+			args = append(args, "--login", "testLogin", "--repo", "user/repo")
+			err := cmd.Run(context.Background(), args)
+			if tt.wantErr {
+				assert.Error(t, err)
+				if tt.errContains != "" {
+					assert.Contains(t, err.Error(), tt.errContains)
+				}
+				return
+			}
+		})
+	}
+}