gcc/libgo/go/testing/iotest/example_test.go
Ian Lance Taylor cfcbb4227f libgo: update to Go1.16beta1 release
This does not yet include support for the //go:embed directive added
in this release.

	* Makefile.am (check-runtime): Don't create check-runtime-dir.
	(mostlyclean-local): Don't remove check-runtime-dir.
	(check-go-tool, check-vet): Copy in go.mod and modules.txt.
	(check-cgo-test, check-carchive-test): Add go.mod file.
	* Makefile.in: Regenerate.

Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/280172
2020-12-30 15:13:24 -08:00

23 lines
469 B
Go

// Copyright 2020 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package iotest_test
import (
"errors"
"fmt"
"testing/iotest"
)
func ExampleErrReader() {
// A reader that always returns a custom error.
r := iotest.ErrReader(errors.New("custom error"))
n, err := r.Read(nil)
fmt.Printf("n: %d\nerr: %q\n", n, err)
// Output:
// n: 0
// err: "custom error"
}