go.uber.org/cadence@v1.2.9/internal/encoded_test.go (about)

     1  // Copyright (c) 2017 Uber Technologies, Inc.
     2  //
     3  // Permission is hereby granted, free of charge, to any person obtaining a copy
     4  // of this software and associated documentation files (the "Software"), to deal
     5  // in the Software without restriction, including without limitation the rights
     6  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
     7  // copies of the Software, and to permit persons to whom the Software is
     8  // furnished to do so, subject to the following conditions:
     9  //
    10  // The above copyright notice and this permission notice shall be included in
    11  // all copies or substantial portions of the Software.
    12  //
    13  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    14  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    15  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    16  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    17  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    18  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
    19  // THE SOFTWARE.
    20  
    21  package internal
    22  
    23  import (
    24  	"bytes"
    25  	"encoding/gob"
    26  	"fmt"
    27  	"reflect"
    28  	"testing"
    29  
    30  	"github.com/stretchr/testify/require"
    31  )
    32  
    33  func testDataConverterFunction(t *testing.T, dc DataConverter, f interface{}, args ...interface{}) string {
    34  	input, err := dc.ToData(args...)
    35  	require.NoError(t, err, err)
    36  
    37  	var result []interface{}
    38  	for _, v := range args {
    39  		arg := reflect.New(reflect.TypeOf(v)).Interface()
    40  		result = append(result, arg)
    41  	}
    42  	err = dc.FromData(input, result...)
    43  	require.NoError(t, err, err)
    44  
    45  	targetArgs := []reflect.Value{}
    46  	for _, arg := range result {
    47  		targetArgs = append(targetArgs, reflect.ValueOf(arg).Elem())
    48  	}
    49  	fnValue := reflect.ValueOf(f)
    50  	retValues := fnValue.Call(targetArgs)
    51  	return retValues[0].Interface().(string)
    52  }
    53  
    54  func TestDefaultDataConverter(t *testing.T) {
    55  	t.Parallel()
    56  	dc := getDefaultDataConverter()
    57  	t.Run("result", func(t *testing.T) {
    58  		t.Parallel()
    59  		f1 := func(ctx Context, r []byte) string {
    60  			return "result"
    61  		}
    62  		r1 := testDataConverterFunction(t, dc, f1, new(emptyCtx), []byte("test"))
    63  		require.Equal(t, r1, "result")
    64  	})
    65  	t.Run("empty", func(t *testing.T) {
    66  		t.Parallel()
    67  		// No parameters.
    68  		f2 := func() string {
    69  			return "empty-result"
    70  		}
    71  		r2 := testDataConverterFunction(t, dc, f2)
    72  		require.Equal(t, r2, "empty-result")
    73  	})
    74  	t.Run("nil", func(t *testing.T) {
    75  		t.Parallel()
    76  		// Nil parameter.
    77  		f3 := func(r []byte) string {
    78  			return "nil-result"
    79  		}
    80  		r3 := testDataConverterFunction(t, dc, f3, []byte(""))
    81  		require.Equal(t, r3, "nil-result")
    82  	})
    83  }
    84  
    85  // testDataConverter implements encoded.DataConverter using gob
    86  type testDataConverter struct{}
    87  
    88  func newTestDataConverter() DataConverter {
    89  	return &testDataConverter{}
    90  }
    91  
    92  func (tdc *testDataConverter) ToData(value ...interface{}) ([]byte, error) {
    93  	var buf bytes.Buffer
    94  	enc := gob.NewEncoder(&buf)
    95  	for i, obj := range value {
    96  		if err := enc.Encode(obj); err != nil {
    97  			return nil, fmt.Errorf(
    98  				"unable to encode argument: %d, %v, with gob error: %v", i, reflect.TypeOf(obj), err)
    99  		}
   100  	}
   101  	return buf.Bytes(), nil
   102  }
   103  
   104  func (tdc *testDataConverter) FromData(input []byte, valuePtr ...interface{}) error {
   105  	dec := gob.NewDecoder(bytes.NewBuffer(input))
   106  	for i, obj := range valuePtr {
   107  		if err := dec.Decode(obj); err != nil {
   108  			return fmt.Errorf(
   109  				"unable to decode argument: %d, %v, with gob error: %v", i, reflect.TypeOf(obj), err)
   110  		}
   111  	}
   112  	return nil
   113  }
   114  
   115  func TestDecodeArg(t *testing.T) {
   116  	t.Parallel()
   117  	dc := getDefaultDataConverter()
   118  
   119  	b, err := encodeArg(dc, testErrorDetails3)
   120  	require.NoError(t, err)
   121  	var r testStruct
   122  	err = decodeArg(dc, b, &r)
   123  	require.NoError(t, err)
   124  	require.Equal(t, testErrorDetails3, r)
   125  
   126  	// test mismatch of multi arguments
   127  	b, err = encodeArgs(dc, []interface{}{testErrorDetails1, testErrorDetails2})
   128  	require.NoError(t, err)
   129  	require.Error(t, decodeArg(dc, b, &r))
   130  }