// Copyright 2011 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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"fmt"
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"testing"
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)
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func TestNewEqual(t *testing.T) {
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// Different allocations should not be equal.
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if errors.New("abc") == errors.New("abc") {
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t.Errorf(`New("abc") == New("abc")`)
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}
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if errors.New("abc") == errors.New("xyz") {
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t.Errorf(`New("abc") == New("xyz")`)
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}
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// Same allocation should be equal to itself (not crash).
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err := errors.New("jkl")
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if err != err {
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t.Errorf(`err != err`)
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}
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}
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func TestErrorMethod(t *testing.T) {
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err := errors.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 ExampleNew() {
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err := errors.New("emit macho dwarf: elf header corrupted")
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if err != nil {
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fmt.Print(err)
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}
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// Output: emit macho dwarf: elf header corrupted
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}
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// The fmt package's Errorf function lets us use the package's formatting
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// features to create descriptive error messages.
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func ExampleNew_errorf() {
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const name, id = "bimmler", 17
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err := fmt.Errorf("user %q (id %d) not found", name, id)
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if err != nil {
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fmt.Print(err)
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}
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// Output: user "bimmler" (id 17) not found
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}
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