| // Copyright (c) 2019 Uber Technologies, Inc. |
| // |
| // Permission is hereby granted, free of charge, to any person obtaining a copy |
| // of this software and associated documentation files (the "Software"), to deal |
| // in the Software without restriction, including without limitation the rights |
| // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| // copies of the Software, and to permit persons to whom the Software is |
| // furnished to do so, subject to the following conditions: |
| // |
| // The above copyright notice and this permission notice shall be included in |
| // all copies or substantial portions of the Software. |
| // |
| // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| // THE SOFTWARE. |
| |
| // +build go1.13 |
| |
| package multierr_test |
| |
| import ( |
| "errors" |
| "os" |
| "testing" |
| |
| "github.com/stretchr/testify/assert" |
| "github.com/stretchr/testify/require" |
| "go.uber.org/multierr" |
| ) |
| |
| type errGreatSadness struct{ id int } |
| |
| func (errGreatSadness) Error() string { |
| return "great sadness" |
| } |
| |
| type errUnprecedentedFailure struct{ id int } |
| |
| func (errUnprecedentedFailure) Error() string { |
| return "unprecedented failure" |
| } |
| |
| func (e errUnprecedentedFailure) Unwrap() error { |
| return errRootCause{e.id} |
| } |
| |
| type errRootCause struct{ i int } |
| |
| func (errRootCause) Error() string { |
| return "root cause" |
| } |
| |
| func TestErrorsWrapping(t *testing.T) { |
| err := multierr.Append( |
| errGreatSadness{42}, |
| errUnprecedentedFailure{43}, |
| ) |
| |
| t.Run("left", func(t *testing.T) { |
| t.Run("As", func(t *testing.T) { |
| var got errGreatSadness |
| require.True(t, errors.As(err, &got)) |
| assert.Equal(t, 42, got.id) |
| }) |
| |
| t.Run("Is", func(t *testing.T) { |
| assert.False(t, errors.Is(err, errGreatSadness{41})) |
| assert.True(t, errors.Is(err, errGreatSadness{42})) |
| }) |
| }) |
| |
| t.Run("right", func(t *testing.T) { |
| t.Run("As", func(t *testing.T) { |
| var got errUnprecedentedFailure |
| require.True(t, errors.As(err, &got)) |
| assert.Equal(t, 43, got.id) |
| }) |
| |
| t.Run("Is", func(t *testing.T) { |
| assert.False(t, errors.Is(err, errUnprecedentedFailure{42})) |
| assert.True(t, errors.Is(err, errUnprecedentedFailure{43})) |
| }) |
| }) |
| |
| t.Run("top-level", func(t *testing.T) { |
| t.Run("As", func(t *testing.T) { |
| var got interface{ Errors() []error } |
| require.True(t, errors.As(err, &got)) |
| assert.Len(t, got.Errors(), 2) |
| }) |
| |
| t.Run("Is", func(t *testing.T) { |
| assert.True(t, errors.Is(err, err)) |
| }) |
| }) |
| |
| t.Run("root cause", func(t *testing.T) { |
| t.Run("As", func(t *testing.T) { |
| var got errRootCause |
| require.True(t, errors.As(err, &got)) |
| assert.Equal(t, 43, got.i) |
| }) |
| |
| t.Run("Is", func(t *testing.T) { |
| assert.False(t, errors.Is(err, errRootCause{42})) |
| assert.True(t, errors.Is(err, errRootCause{43})) |
| }) |
| }) |
| |
| t.Run("mismatch", func(t *testing.T) { |
| t.Run("As", func(t *testing.T) { |
| var got *os.PathError |
| assert.False(t, errors.As(err, &got)) |
| }) |
| |
| t.Run("Is", func(t *testing.T) { |
| assert.False(t, errors.Is(err, errors.New("great sadness"))) |
| }) |
| }) |
| } |
| |
| func TestErrorsWrappingSameType(t *testing.T) { |
| err := multierr.Combine( |
| errGreatSadness{1}, |
| errGreatSadness{2}, |
| errGreatSadness{3}, |
| ) |
| |
| t.Run("As returns first", func(t *testing.T) { |
| var got errGreatSadness |
| require.True(t, errors.As(err, &got)) |
| assert.Equal(t, 1, got.id) |
| }) |
| |
| t.Run("Is matches all", func(t *testing.T) { |
| assert.True(t, errors.Is(err, errGreatSadness{1})) |
| assert.True(t, errors.Is(err, errGreatSadness{2})) |
| assert.True(t, errors.Is(err, errGreatSadness{3})) |
| }) |
| } |