backendtest.go

// Copyright 2025 - See NOTICE file for copyright holders.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package channel

import (
	"testing"

	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

// TestBackendID is the identifier for the simulated Backend.
const TestBackendID = 0

// SetBackendTest is a generic backend test.
func SetBackendTest(t *testing.T) {
	t.Helper()
	assert.Panics(t, func() { SetBackend(nil, TestBackendID) }, "nil backend set should panic")
	require.NotNil(t, backend, "backend should be already set by init()")
	assert.Panics(t, func() { SetBackend(backend[TestBackendID], TestBackendID) }, "setting a backend twice should panic")
}