goprotobuf: Add a Size function.
R=r
CC=golang-dev
http://codereview.appspot.com/6812097
diff --git a/proto/size2_test.go b/proto/size2_test.go
new file mode 100644
index 0000000..0183256
--- /dev/null
+++ b/proto/size2_test.go
@@ -0,0 +1,63 @@
+// Go support for Protocol Buffers - Google's data interchange format
+//
+// Copyright 2012 Google Inc. All rights reserved.
+// http://code.google.com/p/goprotobuf/
+//
+// Redistribution and use in source and binary forms, with or without
+// 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.
+// * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+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)
+ }
+ }
+}