mirror of https://go.googlesource.com/go
73 lines
1.7 KiB
Go
73 lines
1.7 KiB
Go
// Copyright 2022 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package errors_test
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import (
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"errors"
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"reflect"
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"testing"
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)
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func TestJoinReturnsNil(t *testing.T) {
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if err := errors.Join(); err != nil {
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t.Errorf("errors.Join() = %v, want nil", err)
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}
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if err := errors.Join(nil); err != nil {
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t.Errorf("errors.Join(nil) = %v, want nil", err)
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}
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if err := errors.Join(nil, nil); err != nil {
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t.Errorf("errors.Join(nil, nil) = %v, want nil", err)
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}
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}
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func TestJoin(t *testing.T) {
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err1 := errors.New("err1")
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err2 := errors.New("err2")
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for _, test := range []struct {
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errs []error
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want []error
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}{{
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errs: []error{err1},
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want: []error{err1},
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}, {
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errs: []error{err1, err2},
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want: []error{err1, err2},
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}, {
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errs: []error{err1, nil, err2},
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want: []error{err1, err2},
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}} {
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got := errors.Join(test.errs...).(interface{ Unwrap() []error }).Unwrap()
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if !reflect.DeepEqual(got, test.want) {
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t.Errorf("Join(%v) = %v; want %v", test.errs, got, test.want)
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}
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if len(got) != cap(got) {
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t.Errorf("Join(%v) returns errors with len=%v, cap=%v; want len==cap", test.errs, len(got), cap(got))
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}
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}
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}
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func TestJoinErrorMethod(t *testing.T) {
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err1 := errors.New("err1")
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err2 := errors.New("err2")
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for _, test := range []struct {
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errs []error
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want string
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}{{
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errs: []error{err1},
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want: "err1",
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}, {
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errs: []error{err1, err2},
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want: "err1\nerr2",
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}, {
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errs: []error{err1, nil, err2},
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want: "err1\nerr2",
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}} {
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got := errors.Join(test.errs...).Error()
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if got != test.want {
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t.Errorf("Join(%v).Error() = %q; want %q", test.errs, got, test.want)
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}
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}
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}
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