github.com/gogo/protobuf@v1.3.2/proto/size2_test.go (about)

     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
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    13  // copyright notice, this list of conditions and the following disclaimer
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    18  // this software without specific prior written permission.
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    30  // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
    31  
    32  package proto
    33  
    34  import (
    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  
    43  func 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  }