cond_addr_codec_test.go

Documentation: go.mongodb.org/mongo-driver/bson/bsoncodec

     1  // Copyright (C) MongoDB, Inc. 2017-present.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License"); you may
     4  // not use this file except in compliance with the License. You may obtain
     5  // a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
     6  
     7  package bsoncodec
     8  
     9  import (
    10  	"reflect"
    11  	"testing"
    12  
    13  	"go.mongodb.org/mongo-driver/bson/bsonrw"
    14  	"go.mongodb.org/mongo-driver/bson/bsonrw/bsonrwtest"
    15  	"go.mongodb.org/mongo-driver/internal/assert"
    16  )
    17  
    18  func TestCondAddrCodec(t *testing.T) {
    19  	var inner int
    20  	canAddrVal := reflect.ValueOf(&inner)
    21  	addressable := canAddrVal.Elem()
    22  	unaddressable := reflect.ValueOf(inner)
    23  	rw := &bsonrwtest.ValueReaderWriter{}
    24  
    25  	t.Run("addressEncode", func(t *testing.T) {
    26  		invoked := 0
    27  		encode1 := ValueEncoderFunc(func(EncodeContext, bsonrw.ValueWriter, reflect.Value) error {
    28  			invoked = 1
    29  			return nil
    30  		})
    31  		encode2 := ValueEncoderFunc(func(EncodeContext, bsonrw.ValueWriter, reflect.Value) error {
    32  			invoked = 2
    33  			return nil
    34  		})
    35  		condEncoder := newCondAddrEncoder(encode1, encode2)
    36  
    37  		testCases := []struct {
    38  			name    string
    39  			val     reflect.Value
    40  			invoked int
    41  		}{
    42  			{"canAddr", addressable, 1},
    43  			{"else", unaddressable, 2},
    44  		}
    45  		for _, tc := range testCases {
    46  			t.Run(tc.name, func(t *testing.T) {
    47  				err := condEncoder.EncodeValue(EncodeContext{}, rw, tc.val)
    48  				assert.Nil(t, err, "CondAddrEncoder error: %v", err)
    49  
    50  				assert.Equal(t, invoked, tc.invoked, "Expected function %v to be called, called %v", tc.invoked, invoked)
    51  			})
    52  		}
    53  
    54  		t.Run("error", func(t *testing.T) {
    55  			errEncoder := newCondAddrEncoder(encode1, nil)
    56  			err := errEncoder.EncodeValue(EncodeContext{}, rw, unaddressable)
    57  			want := ErrNoEncoder{Type: unaddressable.Type()}
    58  			assert.Equal(t, err, want, "expected error %v, got %v", want, err)
    59  		})
    60  	})
    61  	t.Run("addressDecode", func(t *testing.T) {
    62  		invoked := 0
    63  		decode1 := ValueDecoderFunc(func(DecodeContext, bsonrw.ValueReader, reflect.Value) error {
    64  			invoked = 1
    65  			return nil
    66  		})
    67  		decode2 := ValueDecoderFunc(func(DecodeContext, bsonrw.ValueReader, reflect.Value) error {
    68  			invoked = 2
    69  			return nil
    70  		})
    71  		condDecoder := newCondAddrDecoder(decode1, decode2)
    72  
    73  		testCases := []struct {
    74  			name    string
    75  			val     reflect.Value
    76  			invoked int
    77  		}{
    78  			{"canAddr", addressable, 1},
    79  			{"else", unaddressable, 2},
    80  		}
    81  		for _, tc := range testCases {
    82  			t.Run(tc.name, func(t *testing.T) {
    83  				err := condDecoder.DecodeValue(DecodeContext{}, rw, tc.val)
    84  				assert.Nil(t, err, "CondAddrDecoder error: %v", err)
    85  
    86  				assert.Equal(t, invoked, tc.invoked, "Expected function %v to be called, called %v", tc.invoked, invoked)
    87  			})
    88  		}
    89  
    90  		t.Run("error", func(t *testing.T) {
    91  			errDecoder := newCondAddrDecoder(decode1, nil)
    92  			err := errDecoder.DecodeValue(DecodeContext{}, rw, unaddressable)
    93  			want := ErrNoDecoder{Type: unaddressable.Type()}
    94  			assert.Equal(t, err, want, "expected error %v, got %v", want, err)
    95  		})
    96  	})
    97  }
    98
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