[Chromoting] Factor out common code for pin hashing.

remoting/host/pin_hash_unittest.cc

+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include <set>
+#include <string>
+
+#include "remoting/host/pin_hash.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace remoting {
+
+class PinHashTest : public testing::Test {
+};
+
+TEST_F(PinHashTest, DifferentHashValues) {
+  std::string host_id1("Host ID 1");
+  std::string host_id2("Host ID 2");
+  std::string pin1("1111");
+  std::string pin2("2222");
+  std::set<std::string> hash_set;
+  hash_set.insert(GetPinHash(host_id1, pin1));
+  hash_set.insert(GetPinHash(host_id1, pin2));
+  hash_set.insert(GetPinHash(host_id2, pin1));
+  hash_set.insert(GetPinHash(host_id2, pin2));
+  ASSERT_EQ(4, hash_set.size());

[Wez, 2012/04/30 23:13:57]

I think it'd be preferable to have a list of (host-Id, PIN, hash) triples that
can be verified against one another?

[simonmorris, 2012/05/01 00:25:55]

Done.

+}
+
+}  // namespace remoting