github.com/uber/kraken@v0.1.4/utils/errutil/errutil_test.go (about)

     1  // Copyright (c) 2016-2019 Uber Technologies, Inc.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  package errutil
    15  
    16  import (
    17  	"errors"
    18  	"testing"
    19  
    20  	"github.com/stretchr/testify/require"
    21  )
    22  
    23  func TestMultiError(t *testing.T) {
    24  	a := errors.New("a")
    25  	b := errors.New("b")
    26  	c := errors.New("c")
    27  
    28  	tests := []struct {
    29  		description string
    30  		errs        []error
    31  		result      string
    32  	}{
    33  		{"empty", nil, ""},
    34  		{"one error", []error{a}, "a"},
    35  		{"many errors", []error{a, b, c}, "a, b, c"},
    36  	}
    37  	for _, test := range tests {
    38  		t.Run(test.description, func(t *testing.T) {
    39  			require.Equal(t, test.result, MultiError(test.errs).Error())
    40  		})
    41  	}
    42  }
    43  
    44  func TestJoinNil(t *testing.T) {
    45  	f := func() error {
    46  		var errs []error
    47  		return Join(errs)
    48  	}
    49  	require.NoError(t, f())
    50  }
    51  
    52  func TestJoinNonNil(t *testing.T) {
    53  	f := func() error {
    54  		var errs []error
    55  		errs = append(errs, errors.New("some error"))
    56  		return Join(errs)
    57  	}
    58  	require.Error(t, f())
    59  }