Add a Version class and matching unit tests, roughly based on chrome/installe...

base/version_unittest.cc

+// Copyright (c) 2006-2008 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 "base/scoped_ptr.h"
+#include "base/version.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace {
+
+TEST(Version, GetVersionFromString) {
+  static const struct version_string {
+    const char* input;
+    size_t parts;
+    bool success;
+  } cases[] = {
+    {"0", 1, true},
+    {"0.0", 2, true},
+    {"65537.0", 0, false},
+    {"-1.0", 0, false},
+    {"1.-1.0", 0, false},
+    {"+1.0", 0, false},
+    {"1.+1.0", 0, false},
+    {"1.0a", 0, false},
+    {"1.2.3.4.5.6.7.8.9.0", 10, true},
+    {"02.1", 0, false},
+    {"f.1", 0, false},
+  };
+  for (size_t i = 0; i < ARRAYSIZE_UNSAFE(cases); ++i) {
+    scoped_ptr<Version> vers(Version::GetVersionFromString(cases[i].input));
+    EXPECT_EQ(cases[i].success, vers.get() != NULL);
+    if (cases[i].success)
+      EXPECT_EQ(cases[i].parts, vers->components().size());
+  }
+}
+
+TEST(Version, Compare) {
+  static const struct version_compare {
+    const char* lhs;
+    const char* rhs;
+    int expected;
+  } cases[] = {
+    {"1.0", "1.0", 0},
+    {"1.0", "0.0", 1},
+    {"1.0", "2.0", -1},
+    {"1.0", "1.1", -1},
+    {"1.1", "1.0", 1},
+    {"1.0", "1.0.1", -1},
+    {"1.1", "1.0.1", 1},
+    {"1.1", "1.0.1", 1},
+    {"1.0.0", "1.0", 0},
+    {"1.0.3", "1.0.20", -1},
+  };
+  for (size_t i = 0; i < ARRAYSIZE_UNSAFE(cases); ++i) {
+    scoped_ptr<Version> lhs(Version::GetVersionFromString(cases[i].lhs));
+    scoped_ptr<Version> rhs(Version::GetVersionFromString(cases[i].rhs));
+    EXPECT_EQ(lhs->CompareTo(*rhs), cases[i].expected) <<
+          cases[i].lhs << " ? " << cases[i].rhs;
+  }
+}
+
+}