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Current Path: /opt/golang/1.19.4/src/strings

📁 ..
📄 builder.go(3.54 KB)
📄 builder_test.go(7.26 KB)
📄 clone.go(877 B)
📄 clone_test.go(1.22 KB)
📄 compare.go(1.06 KB)
📄 compare_test.go(2.75 KB)
📄 example_test.go(9.38 KB)
📄 export_test.go(1.07 KB)
📄 reader.go(3.87 KB)
📄 reader_test.go(5.87 KB)
📄 replace.go(14.46 KB)
📄 replace_test.go(14.08 KB)
📄 search.go(4.19 KB)
📄 search_test.go(1.88 KB)
📄 strings.go(28.61 KB)
📄 strings_test.go(49.48 KB)

Editing: clone_test.go

// Copyright 2021 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.ß

package strings_test

import (
	"reflect"
	"strings"
	"testing"
	"unsafe"
)

var emptyString string

func TestClone(t *testing.T) {
	var cloneTests = []string{
		"",
		strings.Clone(""),
		strings.Repeat("a", 42)[:0],
		"short",
		strings.Repeat("a", 42),
	}
	for _, input := range cloneTests {
		clone := strings.Clone(input)
		if clone != input {
			t.Errorf("Clone(%q) = %q; want %q", input, clone, input)
		}

inputHeader := (*reflect.StringHeader)(unsafe.Pointer(&input))
		cloneHeader := (*reflect.StringHeader)(unsafe.Pointer(&clone))
		if len(input) != 0 && cloneHeader.Data == inputHeader.Data {
			t.Errorf("Clone(%q) return value should not reference inputs backing memory.", input)
		}

emptyHeader := (*reflect.StringHeader)(unsafe.Pointer(&emptyString))
		if len(input) == 0 && cloneHeader.Data != emptyHeader.Data {
			t.Errorf("Clone(%#v) return value should be equal to empty string.", inputHeader)
		}
	}
}

func BenchmarkClone(b *testing.B) {
	var str = strings.Repeat("a", 42)
	b.ReportAllocs()
	for i := 0; i < b.N; i++ {
		stringSink = strings.Clone(str)
	}
}

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Editing: clone_test.go

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