Source file src/testing/iotest/example_test.go

Documentation: testing/iotest

		 1  // Copyright 2020 The Go Authors. All rights reserved.
		 2  // Use of this source code is governed by a BSD-style
		 3  // license that can be found in the LICENSE file.
		 4  
		 5  package iotest_test
		 6  
		 7  import (
		 8  	"errors"
		 9  	"fmt"
		10  	"testing/iotest"
		11  )
		12  
		13  func ExampleErrReader() {
		14  	// A reader that always returns a custom error.
		15  	r := iotest.ErrReader(errors.New("custom error"))
		16  	n, err := r.Read(nil)
		17  	fmt.Printf("n:	 %d\nerr: %q\n", n, err)
		18  
		19  	// Output:
		20  	// n:	 0
		21  	// err: "custom error"
		22  }
		23  

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