proto/size2_test.go

// Go support for Protocol Buffers - Google's data interchange format
//
// Copyright 2012 The Go Authors.  All rights reserved.
// https://github.com/golang/protobuf
//
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// modification, are permitted provided that the following conditions are
// met:
//
//     * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
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//
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package proto

import (
	"testing"
)

// This is a separate file and package from size_test.go because that one uses
// generated messages and thus may not be in package proto without having a circular
// dependency, whereas this file tests unexported details of size.go.

func TestVarintSize(t *testing.T) {
	// Check the edge cases carefully.
	testCases := []struct {
		n    uint64
		size int
	}{
		{0, 1},
		{1, 1},
		{127, 1},
		{128, 2},
		{16383, 2},
		{16384, 3},
		{1<<63 - 1, 9},
		{1 << 63, 10},
	}
	for _, tc := range testCases {
		size := sizeVarint(tc.n)
		if size != tc.size {
			t.Errorf("sizeVarint(%d) = %d, want %d", tc.n, size, tc.size)
		}
	}
}