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739bf6b929
As mentioned in https://golang.org/issue/34062#issuecomment-529692313 src/cmd refers to older version of golang.org/x/tools. Hence, not checking if multiple errors are used in the same fmt.Errorf. Updating golang.org/x/tools version to latest in src/cmd. Fixes #34062 Change-Id: I358dec2c3d3af2b19add766b8488b919109b81d6 Reviewed-on: https://go-review.googlesource.com/c/go/+/196843 Run-TryBot: Michael Matloob <matloob@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Michael Matloob <matloob@golang.org>
78 lines
2.4 KiB
Go
78 lines
2.4 KiB
Go
// Copyright 2018 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 fmt_test
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import (
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"errors"
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"fmt"
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"testing"
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)
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func TestErrorf(t *testing.T) {
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// noVetErrorf is an alias for fmt.Errorf that does not trigger vet warnings for
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// %w format strings.
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noVetErrorf := fmt.Errorf
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wrapped := errors.New("inner error")
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for _, test := range []struct {
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err error
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wantText string
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wantUnwrap error
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}{{
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err: fmt.Errorf("%w", wrapped),
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wantText: "inner error",
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wantUnwrap: wrapped,
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}, {
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err: fmt.Errorf("added context: %w", wrapped),
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wantText: "added context: inner error",
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wantUnwrap: wrapped,
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}, {
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err: fmt.Errorf("%w with added context", wrapped),
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wantText: "inner error with added context",
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wantUnwrap: wrapped,
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}, {
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err: fmt.Errorf("%s %w %v", "prefix", wrapped, "suffix"),
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wantText: "prefix inner error suffix",
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wantUnwrap: wrapped,
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}, {
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err: fmt.Errorf("%[2]s: %[1]w", wrapped, "positional verb"),
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wantText: "positional verb: inner error",
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wantUnwrap: wrapped,
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}, {
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err: fmt.Errorf("%v", wrapped),
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wantText: "inner error",
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}, {
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err: fmt.Errorf("added context: %v", wrapped),
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wantText: "added context: inner error",
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}, {
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err: fmt.Errorf("%v with added context", wrapped),
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wantText: "inner error with added context",
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}, {
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err: noVetErrorf("%w is not an error", "not-an-error"),
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wantText: "%!w(string=not-an-error) is not an error",
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}, {
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err: noVetErrorf("wrapped two errors: %w %w", errString("1"), errString("2")),
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wantText: "wrapped two errors: 1 %!w(fmt_test.errString=2)",
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}, {
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err: noVetErrorf("wrapped three errors: %w %w %w", errString("1"), errString("2"), errString("3")),
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wantText: "wrapped three errors: 1 %!w(fmt_test.errString=2) %!w(fmt_test.errString=3)",
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}, {
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err: fmt.Errorf("%w", nil),
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wantText: "%!w(<nil>)",
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wantUnwrap: nil, // still nil
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}} {
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if got, want := errors.Unwrap(test.err), test.wantUnwrap; got != want {
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t.Errorf("Formatted error: %v\nerrors.Unwrap() = %v, want %v", test.err, got, want)
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}
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if got, want := test.err.Error(), test.wantText; got != want {
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t.Errorf("err.Error() = %q, want %q", got, want)
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}
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}
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}
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type errString string
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func (e errString) Error() string { return string(e) }
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