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// Copyright (c) 2020 Tailscale Inc & 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 strbuilder
import (
"math"
"testing"
)
func TestBuilder(t *testing.T) {
const want = "Hello, world 123 -456!"
bang := []byte("!")
var got string
allocs := testing.AllocsPerRun(1000, func() {
sb := Get()
sb.WriteString("Hello, world ")
sb.WriteUint(123)
sb.WriteByte(' ')
sb.WriteInt(-456)
sb.Write(bang)
got = sb.String()
})
if got != want {
t.Errorf("got %q; want %q", got, want)
}
if allocs != 1 {
t.Errorf("allocs = %v; want 1", allocs)
}
}
// Verifies scratch buf is large enough.
func TestIntBounds(t *testing.T) {
const want = "-9223372036854775808 9223372036854775807 18446744073709551615"
var got string
allocs := testing.AllocsPerRun(1000, func() {
sb := Get()
sb.WriteInt(math.MinInt64)
sb.WriteByte(' ')
sb.WriteInt(math.MaxInt64)
sb.WriteByte(' ')
sb.WriteUint(math.MaxUint64)
got = sb.String()
})
if got != want {
t.Errorf("got %q; want %q", got, want)
}
if allocs != 1 {
t.Errorf("allocs = %v; want 1", allocs)
}
}
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