server/config: Generic caching backend.

server/config/caching/codec_test.go

+// Copyright 2015 The LUCI Authors. All rights reserved.
+// Use of this source code is governed under the Apache License, Version 2.0
+// that can be found in the LICENSE file.
+
+package caching
+
+import (
+        "testing"
+
+        . "github.com/smartystreets/goconvey/convey"
+)
+
+func TestHashParams(t *testing.T) {
+        t.Parallel()
+
+        Convey(`Testing HashParams`, t, func() {
+                // Can't cheat w/ strings including "\x00" (escaping).
+                //
+                // Without escaping:
+                // ["A\x00B"] => A 0x00 B 0x00
+                // ["A" "B"]  => A 0x00 B 0x00
+                So(HashParams("A\x00B"), ShouldNotResemble, HashParams("A", "B"))
+
+                // Can't cheat with different lengths (length prefix).
+                //
+                // After escaping, but with no length prefix:
+                // ["A\x00" ""]     => A 0x00 0x00 0x00 0x00
+                // ["A" "" "" ""]   => A 0x00 0x00 0x00 0x00
+                So(HashParams("A\x00", ""), ShouldNotResemble, HashParams("A", "", "", ""))
+        })
+}