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2cadb80fb2
Thus new function allows constructing vizerrors that combine a message appropriate for display to users with a wrapped underlying error. Updates tailscale/corp#23781 Signed-off-by: Percy Wegmann <percy@tailscale.com>
67 lines
1.5 KiB
Go
67 lines
1.5 KiB
Go
// Copyright (c) Tailscale Inc & AUTHORS
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// SPDX-License-Identifier: BSD-3-Clause
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package vizerror
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import (
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"errors"
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"fmt"
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"io/fs"
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"testing"
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)
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func TestNew(t *testing.T) {
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err := New("abc")
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if err.Error() != "abc" {
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t.Errorf(`New("abc").Error() = %q, want %q`, err.Error(), "abc")
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}
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}
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func TestErrorf(t *testing.T) {
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err := Errorf("%w", fs.ErrNotExist)
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if got, want := err.Error(), "file does not exist"; got != want {
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t.Errorf("Errorf().Error() = %q, want %q", got, want)
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}
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// ensure error wrapping still works
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if !errors.Is(err, fs.ErrNotExist) {
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t.Errorf("error chain does not contain fs.ErrNotExist")
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}
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}
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func TestAs(t *testing.T) {
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verr := New("visible error")
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err := fmt.Errorf("wrap: %w", verr)
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got, ok := As(err)
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if !ok {
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t.Errorf("As() return false, want true")
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}
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if got != verr {
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t.Errorf("As() returned error %v, want %v", got, verr)
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}
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}
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func TestWrap(t *testing.T) {
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wrapped := errors.New("wrapped")
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err := Wrap(wrapped)
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if err.Error() != "wrapped" {
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t.Errorf(`Wrap(wrapped).Error() = %q, want %q`, err.Error(), "wrapped")
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}
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if errors.Unwrap(err) != wrapped {
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t.Errorf("Unwrap = %q, want %q", errors.Unwrap(err), wrapped)
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}
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}
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func TestWrapWithMessage(t *testing.T) {
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wrapped := errors.New("wrapped")
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err := WrapWithMessage(wrapped, "safe")
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if err.Error() != "safe" {
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t.Errorf(`WrapWithMessage(wrapped, "safe").Error() = %q, want %q`, err.Error(), "safe")
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}
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if errors.Unwrap(err) != wrapped {
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t.Errorf("Unwrap = %q, want %q", errors.Unwrap(err), wrapped)
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}
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}
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