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1// Go support for Protocol Buffers - Google's data interchange format
2//
3// Copyright 2012 The Go Authors.  All rights reserved.
4// https://github.com/golang/protobuf
5//
6// Redistribution and use in source and binary forms, with or without
7// modification, are permitted provided that the following conditions are
8// met:
9//
10//     * Redistributions of source code must retain the above copyright
11// notice, this list of conditions and the following disclaimer.
12//     * Redistributions in binary form must reproduce the above
13// copyright notice, this list of conditions and the following disclaimer
14// in the documentation and/or other materials provided with the
15// distribution.
16//     * Neither the name of Google Inc. nor the names of its
17// contributors may be used to endorse or promote products derived from
18// this software without specific prior written permission.
19//
20// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
23// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
24// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
25// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
26// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
30// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31
32package proto
33
34import (
35	"math"
36	"testing"
37)
38
39// This is a separate file and package from size_test.go because that one uses
40// generated messages and thus may not be in package proto without having a circular
41// dependency, whereas this file tests unexported details of size.go.
42
43func TestVarintSize(t *testing.T) {
44	// Check the edge cases carefully.
45	testCases := []struct {
46		n    uint64
47		size int
48	}{
49		{0, 1},
50		{1, 1},
51		{127, 1},
52		{128, 2},
53		{16383, 2},
54		{16384, 3},
55		{math.MaxInt64, 9},
56		{math.MaxInt64 + 1, 10},
57	}
58	for _, tc := range testCases {
59		size := SizeVarint(tc.n)
60		if size != tc.size {
61			t.Errorf("sizeVarint(%d) = %d, want %d", tc.n, size, tc.size)
62		}
63	}
64}
65