Fix #37 Last error code cannot be accessed

+ added corresponding basic unit tests

include/SQLiteCpp/Database.h

@@ -239,17 +239,25 @@ public:
         return sqlite3_total_changes(mpSQLite);
     }
 
-    /**
+    /// @brief Return the filename used to open the database.
-     * @brief Return the filename used to open the database
-     */
     inline const std::string& getFilename() const noexcept // nothrow
     {
         return mFilename;
     }
 
-    /**
+    /// @brief Return the numeric result code for the most recent failed API call (if any).
-     * @brief Return UTF-8 encoded English language explanation of the most recent error.
+    inline int getErrorCode() const noexcept // nothrow
-     */
+    {
+        return sqlite3_errcode(mpSQLite);
+    }
+
+    /// @brief Return the extended numeric result code for the most recent failed API call (if any).
+    inline int getExtendedErrorCode() const noexcept // nothrow
+    {
+        return sqlite3_extended_errcode(mpSQLite);
+    }
+
+    /// Return UTF-8 encoded English language explanation of the most recent failed API call (if any).
     inline const char* errmsg() const noexcept // nothrow
     {
         return sqlite3_errmsg(mpSQLite);

include/SQLiteCpp/Statement.h

@@ -326,8 +326,18 @@ public:
     {
         return mbDone;
     }
-    /// @brief Return UTF-8 encoded English language explanation of the most recent error.
+    /// @brief Return the numeric result code for the most recent failed API call (if any).
-    inline const char* errmsg() const
+    inline int getErrorCode() const noexcept // nothrow
+    {
+        return sqlite3_errcode(mStmtPtr);
+    }
+    /// @brief Return the extended numeric result code for the most recent failed API call (if any).
+    inline int getExtendedErrorCode() const noexcept // nothrow
+    {
+        return sqlite3_extended_errcode(mStmtPtr);
+    }
+    /// Return UTF-8 encoded English language explanation of the most recent failed API call (if any).
+    inline const char* errmsg() const noexcept // nothrow
     {
         return sqlite3_errmsg(mStmtPtr);
     }

tests/Database_test.cpp

@@ -146,15 +146,23 @@ TEST(Database, execException) {
     {
         // Create a new database
         SQLite::Database db("test.db3", SQLITE_OPEN_READWRITE|SQLITE_OPEN_CREATE);
+        EXPECT_EQ(SQLITE_OK, db.getErrorCode());
+        EXPECT_EQ(SQLITE_OK, db.getExtendedErrorCode());
 
         // exception with SQL error: "no such table"
         EXPECT_THROW(db.exec("INSERT INTO test VALUES (NULL, \"first\",  3)"), SQLite::Exception);
+        EXPECT_EQ(SQLITE_ERROR, db.getErrorCode());
+        EXPECT_EQ(SQLITE_ERROR, db.getExtendedErrorCode());
 
         // Create a new table
         db.exec("CREATE TABLE test (id INTEGER PRIMARY KEY, value TEXT, weight INTEGER)");
+        EXPECT_EQ(SQLITE_OK, db.getErrorCode());
+        EXPECT_EQ(SQLITE_OK, db.getExtendedErrorCode());
 
         // exception with SQL error: "table test has 3 columns but 2 values were supplied"
         EXPECT_THROW(db.exec("INSERT INTO test VALUES (NULL,  3)"), SQLite::Exception);
+        EXPECT_EQ(SQLITE_ERROR, db.getErrorCode());
+        EXPECT_EQ(SQLITE_ERROR, db.getExtendedErrorCode());
 
         // exception with SQL error: "No row to get a column from"
         EXPECT_THROW(db.execAndGet("SELECT weight FROM test WHERE value=\"first\""), SQLite::Exception);
@@ -162,7 +170,6 @@ TEST(Database, execException) {
         EXPECT_EQ(1, db.exec("INSERT INTO test VALUES (NULL, \"first\",  3)"));
         // exception with SQL error: "No row to get a column from"
         EXPECT_THROW(db.execAndGet("SELECT weight FROM test WHERE value=\"second\""), SQLite::Exception);
-
     } // Close DB test.db3
     remove("test.db3");
 }

tests/Statement_test.cpp

@@ -22,11 +22,17 @@ TEST(Statement, invalid) {
     {
         // Create a new database
         SQLite::Database db("test.db3", SQLITE_OPEN_READWRITE|SQLITE_OPEN_CREATE);
+        EXPECT_EQ(SQLITE_OK, db.getErrorCode());
+        EXPECT_EQ(SQLITE_OK, db.getExtendedErrorCode());
 
         // Compile a SQL query, but without any table in the database
         EXPECT_THROW(SQLite::Statement query(db, "SELECT * FROM test"), SQLite::Exception);
+        EXPECT_EQ(SQLITE_ERROR, db.getErrorCode());
+        EXPECT_EQ(SQLITE_ERROR, db.getExtendedErrorCode());
 
         EXPECT_EQ(0, db.exec("CREATE TABLE test (id INTEGER PRIMARY KEY, value TEXT)"));
+        EXPECT_EQ(SQLITE_OK, db.getErrorCode());
+        EXPECT_EQ(SQLITE_OK, db.getExtendedErrorCode());
 
         // Compile a SQL query with no parameter
         SQLite::Statement   query(db, "SELECT * FROM test");
@@ -61,6 +67,8 @@ TEST(Statement, invalid) {
         EXPECT_THROW(query.bind(2, 123), SQLite::Exception);
         EXPECT_THROW(query.bind(0, "abc"), SQLite::Exception);
         EXPECT_THROW(query.bind(0), SQLite::Exception);
+        EXPECT_EQ(SQLITE_RANGE, db.getErrorCode());
+        EXPECT_EQ(SQLITE_RANGE, db.getExtendedErrorCode());
 
         query.exec();
         EXPECT_THROW(query.isColumnNull(0), SQLite::Exception);