sqld.cc

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/*
BSD 3-Clause License
 
Copyright (c) 2022, Stable Cloud Computing, Inc.
 
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
 
1. Redistributions of source code must retain the above copyright notice, this
   list of conditions and the following disclaimer.
 
2. 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.
 
3. Neither the name of the copyright holder 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 HOLDER OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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*/
#include <sqlite/sqld.h>
#include <gtest/gtest.h>
#include <string>
#include <iostream>
#include <system_error>
#include <util/fs.h>
 
using std::cout;
using std::endl;
using std::string;
using std::vector;
using std::system_error;
using std::runtime_error;
using fs = scc::util::Filesystem;
using scc::sqld::Conn;
using scc::sqld::Req;
using scc::sqld::Trans;
 
struct SqliteTest : public testing::Test
{
    string curdir;
    Conn db;
 
    SqliteTest()
    {
        curdir = fs::get_current_dir();
 
        system_error err;
        fs::remove_all("sandbox", &err);
        fs::create_dir("sandbox");
        fs::change_dir("sandbox");
    }
    virtual ~SqliteTest()
    {
        fs::change_dir(curdir);
        system_error err;
        fs::remove_all("sandbox", &err);
    }
 
    void reopen(const string& uri)
    {
        cout << "opening: " << uri << endl;
        db.reopen(uri);
    }
};
 
TEST_F(SqliteTest, default_conn)
{
    auto fs = fs::scan_dir(".");
    cout << "filesystem:" << endl;
    for (auto& d : fs)
    {
        cout << d.first << " " << d.second << endl;
    }
    ASSERT_EQ(fs.size(), 0);
}
 
TEST_F(SqliteTest, memory_conn)
{
    reopen("file::memory:");        // reopen the connection without the shared cache
    auto fs = fs::scan_dir(".");
    cout << "filesystem:" << endl;
    for (auto& d : fs)
    {
        cout << d.first << " " << d.second << endl;
    }
    ASSERT_EQ(fs.size(), 0);
}
 
TEST_F(SqliteTest, file_open)
{
    reopen("file:dbfile?mode=rwc"); // open a read/write/create file backed connection
    auto fs = fs::scan_dir(".");
    cout << "filesystem:" << endl;
    for (auto& d : fs)
    {
        cout << d.first << " " << d.second << endl;
    }
    ASSERT_EQ(fs.size(), 1);
    system_error err;
    ASSERT_EQ(fs::file_stat("dbfile", &err).type, scc::util::FileType::reg);
}
 
TEST_F(SqliteTest, exec_select)
{
    Req req(db);
 
    req.sql()
        << "create table t(a TEXT, b INT) STRICT;"
        << "insert into t values('hello!', 1);"
        << "insert into t values('goodbye', 2);"
        << "select * from t;";
 
    int r = req.exec_select();
    ASSERT_EQ(r, 2);
 
    cout << "first col name: " << req.col_name(0) << endl;
    ASSERT_EQ(req.col_name(0), "a");
    string n;
    req.col_name(1, n);
    cout << "second col name: " << n << endl;
    ASSERT_EQ(n, "b");
 
    ASSERT_EQ(req.col_text(0), "hello!");
    req.col_text(0, n);
    ASSERT_EQ(n, "hello!");
 
    ASSERT_EQ(req.col_int(1), 1);
 
    ASSERT_EQ(req.next_row(), 2);
 
    ASSERT_EQ(req.col_text(0), "goodbye");
    req.col_text(0, n);
    ASSERT_EQ(n, "goodbye");
 
    ASSERT_EQ(req.col_int(1), 2);
 
    ASSERT_EQ(req.next_row(), 0);
 
    ASSERT_EQ(req.exec_select(), 0);
}
 
TEST_F(SqliteTest, exec)
{
    reopen("file:dbfile?mode=rwc");
    Req req(db);
 
    int64_t big = 1;
    big <<= 48;
 
    cout << "big is " << big << endl;
 
    req.sql()
        << "create table t(a VARCHAR PRIMARY KEY, b DOUBLE, c INTEGER DEFAULT 0);"
        << "insert into t (a, b) values('hello!', 1.1);"
        << "insert into t values('goodbye', 2.2, " << big << ");"
        << "select * from t;"
        << "insert into t (a, b) values('until we meet again', 3.3);";
 
    req.exec();     // should go through all the statements ignoring the select statement
 
    req.clear();
    req.sql() << "select b,c from t where a is 'goodbye';";
 
    int r = req.exec_select();
    ASSERT_EQ(r, 2);
    ASSERT_EQ(req.col_real(0), 2.2);
    ASSERT_EQ(req.col_int64(1), big);
}
 
TEST_F(SqliteTest, blob)
{
    Req req(db);
 
    req.sql()
        << "create table t(a BLOB) STRICT;"
        << "insert into t values(x'deadbeef');"
        << "select * from t;";
 
    int r = req.exec_select();
    ASSERT_EQ(r, 1);
 
    vector<char> t = {'\xde', '\xad', '\xbe', '\xef'}, v;
    req.col_blob(0, v);
    ASSERT_EQ(t, v);
}
 
TEST_F(SqliteTest, two_conns_xact)
{
    reopen("file:dbfile?mode=rwc");     // first connection is read/write/create
    
    Req r(db);
 
    r.sql() << "create table t(a ANY) STRICT;";
    r.exec();                                       // create the table
 
    Trans x(db);
 
    ASSERT_FALSE(x.is_active());
 
    x.begin();                                      // begin a transaction
    ASSERT_TRUE(x.is_active());
    r.clear();
    r.sql() << "insert into t values(12345);";
    r.exec();                                       // insert a value
 
    Conn db2("file:dbfile?mode=ro");        // second connection is read-only
 
    Req r2(db2);                        // request on second connection
 
    r2.sql() << "select * from t;";
 
    ASSERT_EQ(r2.exec_select(), 0);     // cannot see the value yet
 
    x.commit();                         // first connection commits transaction
 
    r2.reset();                         // reuse the sql stream request
 
    ASSERT_EQ(r2.exec_select(), 1);     // now the value can be seen
 
    x.begin();
    r.clear();
    r.sql() << "insert into t values(45678);";
    r.exec();
    x.abort();                          // throw away this transaction
 
    r.clear();
    r.sql() << "select * from t where a is 45678;";
    ASSERT_EQ(r.exec_select(), 0);                      // it was rolled back
 
 
    r2.clear();
    r2.sql()    << "insert into t values(45678);";
    ASSERT_THROW(r2.exec(), runtime_error);             // illegal for read-only db connection
}