Unit tests for sql::MetaTable.

sql/meta_table_unittest.cc

Index: sql/meta_table_unittest.cc
diff --git a/sql/meta_table_unittest.cc b/sql/meta_table_unittest.cc
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+// Copyright (c) 2013 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 "sql/meta_table.h"
+
+#include "base/files/file_path.h"
+#include "base/files/scoped_temp_dir.h"
+#include "sql/connection.h"
+#include "sql/statement.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace {
+
+class SQLMetaTableTest : public testing::Test {
+ public:
+  virtual void SetUp() {
+    ASSERT_TRUE(temp_dir_.CreateUniqueTempDir());
+    db_path_ = temp_dir_.path().AppendASCII("SQLMetaTableTest.db");
+    ASSERT_TRUE(db_.Open(db_path_));
+  }
+
+  virtual void TearDown() {
+    db_.Close();
+  }
+
+  sql::Connection& db() { return db_; }
+  const base::FilePath& db_path() { return db_path_; }
+
+ private:
+  base::FilePath db_path_;
+  sql::Connection db_;
+  base::ScopedTempDir temp_dir_;
+};
+
+TEST_F(SQLMetaTableTest, DoesTableExist) {
+  EXPECT_FALSE(sql::MetaTable::DoesTableExist(&db()));
+
+  {
+    sql::MetaTable meta_table;
+    EXPECT_TRUE(meta_table.Init(&db(), 1, 1));
+  }
+
+  EXPECT_TRUE(sql::MetaTable::DoesTableExist(&db()));
+}
+
+TEST_F(SQLMetaTableTest, VersionNumber) {
+  // Compatibility versions one less than the main versions to make
+  // sure the values aren't being crossed with each other.
+  const int kVersionFirst = 2;
+  const int kCompatVersionFirst = kVersionFirst - 1;
+  const int kVersionSecond = 4;
+  const int kCompatVersionSecond = kVersionSecond - 1;
+  const int kVersionThird = 6;
+  const int kCompatVersionThird = kVersionThird - 1;
+
+  // First Init() sets the version info as expected.
+  {
+    sql::MetaTable meta_table;
+    EXPECT_TRUE(meta_table.Init(&db(), kVersionFirst, kCompatVersionFirst));
+    EXPECT_EQ(kVersionFirst, meta_table.GetVersionNumber());
+    EXPECT_EQ(kCompatVersionFirst, meta_table.GetCompatibleVersionNumber());
+  }
+
+  // Second Init() does not change the version info.
+  {
+    sql::MetaTable meta_table;
+    EXPECT_TRUE(meta_table.Init(&db(), kVersionSecond, kCompatVersionSecond));
+    EXPECT_EQ(kVersionFirst, meta_table.GetVersionNumber());
+    EXPECT_EQ(kCompatVersionFirst, meta_table.GetCompatibleVersionNumber());
+
+    meta_table.SetVersionNumber(kVersionSecond);
+    meta_table.SetCompatibleVersionNumber(kCompatVersionSecond);
+  }
+
+  // Version info from Set*() calls is seen.
+  {
+    sql::MetaTable meta_table;
+    EXPECT_TRUE(meta_table.Init(&db(), kVersionThird, kCompatVersionThird));
+    EXPECT_EQ(kVersionSecond, meta_table.GetVersionNumber());
+    EXPECT_EQ(kCompatVersionSecond, meta_table.GetCompatibleVersionNumber());
+  }
+}
+
+TEST_F(SQLMetaTableTest, StringValue) {
+  const char kKey[] = "String Key";
+  const std::string kFirstValue("First Value");
+  const std::string kSecondValue("Second Value");
+
+  // Initially, the value isn't there until set.
+  {
+    sql::MetaTable meta_table;
+    EXPECT_TRUE(meta_table.Init(&db(), 1, 1));
+
+    std::string value;
+    EXPECT_FALSE(meta_table.GetValue(kKey, &value));
+
+    EXPECT_TRUE(meta_table.SetValue(kKey, kFirstValue));
+    EXPECT_TRUE(meta_table.GetValue(kKey, &value));
+    EXPECT_EQ(kFirstValue, value);
+  }
+
+  // Value is persistent across different instances.
+  {
+    sql::MetaTable meta_table;
+    EXPECT_TRUE(meta_table.Init(&db(), 1, 1));
+
+    std::string value;
+    EXPECT_TRUE(meta_table.GetValue(kKey, &value));
+    EXPECT_EQ(kFirstValue, value);
+
+    EXPECT_TRUE(meta_table.SetValue(kKey, kSecondValue));
+  }
+
+  // Existing value was successfully changed.
+  {
+    sql::MetaTable meta_table;
+    EXPECT_TRUE(meta_table.Init(&db(), 1, 1));
+
+    std::string value;
+    EXPECT_TRUE(meta_table.GetValue(kKey, &value));
+    EXPECT_EQ(kSecondValue, value);
+  }
+}
+
+TEST_F(SQLMetaTableTest, IntValue) {
+  const char kKey[] = "Int Key";
+  const int kFirstValue = 17;
+  const int kSecondValue = 23;
+
+  // Initially, the value isn't there until set.
+  {
+    sql::MetaTable meta_table;
+    EXPECT_TRUE(meta_table.Init(&db(), 1, 1));
+
+    int value;
+    EXPECT_FALSE(meta_table.GetValue(kKey, &value));
+
+    EXPECT_TRUE(meta_table.SetValue(kKey, kFirstValue));
+    EXPECT_TRUE(meta_table.GetValue(kKey, &value));
+    EXPECT_EQ(kFirstValue, value);
+  }
+
+  // Value is persistent across different instances.
+  {
+    sql::MetaTable meta_table;
+    EXPECT_TRUE(meta_table.Init(&db(), 1, 1));
+
+    int value;
+    EXPECT_TRUE(meta_table.GetValue(kKey, &value));
+    EXPECT_EQ(kFirstValue, value);
+
+    EXPECT_TRUE(meta_table.SetValue(kKey, kSecondValue));
+  }
+
+  // Existing value was successfully changed.
+  {
+    sql::MetaTable meta_table;
+    EXPECT_TRUE(meta_table.Init(&db(), 1, 1));
+
+    int value;
+    EXPECT_TRUE(meta_table.GetValue(kKey, &value));
+    EXPECT_EQ(kSecondValue, value);
+  }
+}
+
+TEST_F(SQLMetaTableTest, Int64Value) {
+  const char kKey[] = "Int Key";
+  const int64 kFirstValue = 5000000017LLU;
+  const int64 kSecondValue = 5000000023LLU;
+
+  // Initially, the value isn't there until set.
+  {
+    sql::MetaTable meta_table;
+    EXPECT_TRUE(meta_table.Init(&db(), 1, 1));
+
+    int64 value;
+    EXPECT_FALSE(meta_table.GetValue(kKey, &value));
+
+    EXPECT_TRUE(meta_table.SetValue(kKey, kFirstValue));
+    EXPECT_TRUE(meta_table.GetValue(kKey, &value));
+    EXPECT_EQ(kFirstValue, value);
+  }
+
+  // Value is persistent across different instances.
+  {
+    sql::MetaTable meta_table;
+    EXPECT_TRUE(meta_table.Init(&db(), 1, 1));
+
+    int64 value;
+    EXPECT_TRUE(meta_table.GetValue(kKey, &value));
+    EXPECT_EQ(kFirstValue, value);
+
+    EXPECT_TRUE(meta_table.SetValue(kKey, kSecondValue));
+  }
+
+  // Existing value was successfully changed.
+  {
+    sql::MetaTable meta_table;
+    EXPECT_TRUE(meta_table.Init(&db(), 1, 1));
+
+    int64 value;
+    EXPECT_TRUE(meta_table.GetValue(kKey, &value));
+    EXPECT_EQ(kSecondValue, value);
+  }
+}
+
+TEST_F(SQLMetaTableTest, DeleteKey) {
+  const char kKey[] = "String Key";
+  const std::string kValue("String Value");
+
+  sql::MetaTable meta_table;
+  EXPECT_TRUE(meta_table.Init(&db(), 1, 1));
+
+  // Value isn't present.
+  std::string value;
+  EXPECT_FALSE(meta_table.GetValue(kKey, &value));
+
+  // Now value is present.
+  EXPECT_TRUE(meta_table.SetValue(kKey, kValue));
+  EXPECT_TRUE(meta_table.GetValue(kKey, &value));
+  EXPECT_EQ(kValue, value);
+
+  // After delete value isn't present.
+  EXPECT_TRUE(meta_table.DeleteKey(kKey));
+  EXPECT_FALSE(meta_table.GetValue(kKey, &value));
+}
+
+}  // namespace