Merge in tests.

https://github.com/maschs/sqlite_modern_cpp/tree/ms-testCatch/tests

Author: Edward Rosten

tests/trycatchblocks.cc

@@ -0,0 +1,98 @@
+#include <iostream>
+#include <string>
+#include <cstdlib>
+#include <unistd.h>
+#include <sqlite_modern_cpp.h>
+
+using namespace sqlite;
+using std::string;
+
+struct TmpFile
+{
+    string fname;
+
+    TmpFile()
+    {
+        char f[]="/tmp/sqlite_modern_cpp_test_XXXXXX";
+        int fid = mkstemp(f);
+        close(fid);
+
+        fname = f;
+    }
+
+    ~TmpFile()
+    {
+        unlink(fname.c_str());
+    }
+};
+
+
+class DBInterface {
+    database db;
+
+public:
+    DBInterface( const string& fileName ) : db( fileName )
+    {
+    }
+
+    void LogRequest( const string& username, const string& ip, const string& request ) 
+    {
+        try {
+            auto timestamp = std::to_string( time( nullptr ) );
+
+            db  <<
+                "create table if not exists log_request ("
+                "   _id integer primary key autoincrement not null,"
+                "   username text,"
+                "   timestamp text,"
+                "   ip text,"
+                "   request text"
+                ");";
+            db  << "INSERT INTO log_request (username, timestamp, ip, request) VALUES (?,?,?,?);" 
+                << username
+                << timestamp
+                << ip
+                << request;
+        } catch ( const std::exception& e ) {
+            std::cout << e.what() << std::endl;
+        }
+    }
+
+    bool TestData( void ) {
+        try {
+            string username, timestamp, ip, request;
+
+            db  << "select username, timestamp, ip, request from log_request where username = ?"
+                << "test"
+                >> std::tie(username, timestamp, ip, request);
+                    
+            if ( username == "test" && ip == "127.0.0.1" && request == "hello world" ) {
+                return true;
+            }
+        } catch ( const std::exception& e ) {
+            std::cout << e.what() << std::endl;
+        }
+
+        return false;
+    }
+};
+
+int main( void ) 
+{
+    // --------------------------------------------------------------------------
+    // -- Test if writing to disk works properly from within a catch block.
+    // --------------------------------------------------------------------------
+    try {
+        throw "hello";
+    }
+    catch ( ... ) {
+        TmpFile tmpF;
+        DBInterface interf( tmpF.fname );
+        interf.LogRequest( "test", "127.0.0.1", "hello world" );
+        if ( !interf.TestData() ) {
+            exit( EXIT_FAILURE );
+        }
+    }
+
+    exit( EXIT_SUCCESS );
+}