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// Copyright 2017 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 catmsg
import (
"fmt"
"testing"
)
func TestEncodeUint(t *testing.T) {
testCases := []struct {
x uint64
enc string
}{
{0, "\x00"},
{1, "\x01"},
{2, "\x02"},
{0x7f, "\x7f"},
{0x80, "\x80\x01"},
{1 << 14, "\x80\x80\x01"},
{0xffffffff, "\xff\xff\xff\xff\x0f"},
{0xffffffffffffffff, "\xff\xff\xff\xff\xff\xff\xff\xff\xff\x01"},
}
for _, tc := range testCases {
buf := [maxVarintBytes]byte{}
got := string(buf[:encodeUint(buf[:], tc.x)])
if got != tc.enc {
t.Errorf("EncodeUint(%#x) = %q; want %q", tc.x, got, tc.enc)
}
}
}
func TestDecodeUint(t *testing.T) {
testCases := []struct {
x uint64
size int
enc string
err error
}{{
x: 0,
size: 0,
enc: "",
err: errIllegalVarint,
}, {
x: 0,
size: 1,
enc: "\x80",
err: errIllegalVarint,
}, {
x: 0,
size: 3,
enc: "\x80\x80\x80",
err: errIllegalVarint,
}, {
x: 0,
size: 1,
enc: "\x00",
}, {
x: 1,
size: 1,
enc: "\x01",
}, {
x: 2,
size: 1,
enc: "\x02",
}, {
x: 0x7f,
size: 1,
enc: "\x7f",
}, {
x: 0x80,
size: 2,
enc: "\x80\x01",
}, {
x: 1 << 14,
size: 3,
enc: "\x80\x80\x01",
}, {
x: 0xffffffff,
size: 5,
enc: "\xff\xff\xff\xff\x0f",
}, {
x: 0xffffffffffffffff,
size: 10,
enc: "\xff\xff\xff\xff\xff\xff\xff\xff\xff\x01",
}, {
x: 0xffffffffffffffff,
size: 10,
enc: "\xff\xff\xff\xff\xff\xff\xff\xff\xff\x01\x00",
}, {
x: 0,
size: 10,
enc: "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\x01",
err: errVarintTooLarge,
}}
forms := []struct {
name string
decode func(s string) (x uint64, size int, err error)
}{
{"decode", func(s string) (x uint64, size int, err error) {
return decodeUint([]byte(s))
}},
{"decodeString", decodeUintString},
}
for _, f := range forms {
for _, tc := range testCases {
t.Run(fmt.Sprintf("%s:%q", f.name, tc.enc), func(t *testing.T) {
x, size, err := f.decode(tc.enc)
if err != tc.err {
t.Errorf("err = %q; want %q", err, tc.err)
}
if size != tc.size {
t.Errorf("size = %d; want %d", size, tc.size)
}
if x != tc.x {
t.Errorf("decode = %#x; want %#x", x, tc.x)
}
})
}
}
}
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