github.com/cloudwego/kitex@v0.9.0/pkg/endpoint/endpoint_test.go (about)

     1  /*
     2   * Copyright 2021 CloudWeGo Authors
     3   *
     4   * Licensed under the Apache License, Version 2.0 (the "License");
     5   * you may not use this file except in compliance with the License.
     6   * You may obtain a copy of the License at
     7   *
     8   *     http://www.apache.org/licenses/LICENSE-2.0
     9   *
    10   * Unless required by applicable law or agreed to in writing, software
    11   * distributed under the License is distributed on an "AS IS" BASIS,
    12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13   * See the License for the specific language governing permissions and
    14   * limitations under the License.
    15   */
    16  
    17  package endpoint
    18  
    19  import (
    20  	"context"
    21  	"testing"
    22  
    23  	"github.com/cloudwego/kitex/internal/test"
    24  )
    25  
    26  type val struct {
    27  	str string
    28  }
    29  
    30  var (
    31  	biz       = "Biz"
    32  	beforeMW0 = "BeforeMiddleware0"
    33  	afterMW0  = "AfterMiddleware0"
    34  	beforeMW1 = "BeforeMiddleware1"
    35  	afterMW1  = "AfterMiddleware1"
    36  )
    37  
    38  func invoke(ctx context.Context, req, resp interface{}) (err error) {
    39  	val, ok := req.(*val)
    40  	if ok {
    41  		val.str += biz
    42  	}
    43  	return nil
    44  }
    45  
    46  func mockMW0(next Endpoint) Endpoint {
    47  	return func(ctx context.Context, req, resp interface{}) (err error) {
    48  		val, ok := req.(*val)
    49  		if ok {
    50  			val.str += beforeMW0
    51  		}
    52  		err = next(ctx, req, resp)
    53  		if err != nil {
    54  			return err
    55  		}
    56  		if ok {
    57  			val.str += afterMW0
    58  		}
    59  		return nil
    60  	}
    61  }
    62  
    63  func mockMW1(next Endpoint) Endpoint {
    64  	return func(ctx context.Context, req, resp interface{}) (err error) {
    65  		val, ok := req.(*val)
    66  		if ok {
    67  			val.str += beforeMW1
    68  		}
    69  		err = next(ctx, req, resp)
    70  		if err != nil {
    71  			return err
    72  		}
    73  		if ok {
    74  			val.str += afterMW1
    75  		}
    76  		return nil
    77  	}
    78  }
    79  
    80  func TestChain(t *testing.T) {
    81  	mws := Chain(mockMW0, mockMW1)
    82  	req := &val{}
    83  	mws(invoke)(context.Background(), req, nil)
    84  	final := beforeMW0 + beforeMW1 + biz + afterMW1 + afterMW0
    85  	test.Assert(t, req.str == final)
    86  }
    87  
    88  func TestBuild(t *testing.T) {
    89  	test.Assert(t, Build(nil)(DummyEndpoint)(context.Background(), nil, nil) == nil)
    90  	mws := Build([]Middleware{mockMW0, mockMW1})
    91  	req := &val{}
    92  	mws(invoke)(context.Background(), req, nil)
    93  	final := beforeMW0 + beforeMW1 + biz + afterMW1 + afterMW0
    94  	test.Assert(t, req.str == final)
    95  }