add unit test for variadic bind

CMakeLists.txt

@@ -99,6 +99,7 @@ set(SQLITECPP_TESTS
  tests/Database_test.cpp
  tests/Statement_test.cpp
  tests/Backup_test.cpp
+ tests/VariadicBind_test.cpp
 )
 source_group(tests FILES ${SQLITECPP_TESTS})
 

tests/VariadicBind_test.cpp

@@ -0,0 +1,77 @@
+/**
+ * @file    VariadicBind_test.cpp
+ * @ingroup tests
+ * @brief   Test of variadic bind
+ *
+ * Copyright (c) 2016 Paul Dreik (github@pauldreik.se)
+ *
+ * Distributed under the MIT License (MIT) (See accompanying file LICENSE.txt
+ * or copy at http://opensource.org/licenses/MIT)
+ */
+
+#include <SQLiteCpp/Database.h>
+#include <SQLiteCpp/Statement.h>
+#include <SQLiteCpp/VariadicBind.h>
+
+#include <gtest/gtest.h>
+
+#include <cstdio>
+
+//this requires c++14. seems like visual studio 2015 should work (yet untested).
+#if ( __cplusplus>= 201402L) || ( defined(_MSC_VER) && (_MSC_VER >= 1900) )
+
+TEST(VariadicBind, invalid) {
+	// Create a new database
+#if 0
+	SQLite::Database db("variadic_bind_test.db3", SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE);
+#else
+	SQLite::Database db(":memory:", SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE);
+#endif
+
+	EXPECT_EQ(0, db.exec("DROP TABLE IF EXISTS test"));
+	EXPECT_EQ(0,
+			db.exec(
+					"CREATE TABLE test (id INTEGER PRIMARY KEY, value TEXT DEFAULT 'default') "));
+	EXPECT_TRUE(db.tableExists("test"));
+
+	{
+		SQLite::Statement query(db, "INSERT INTO test VALUES (?, ?)");
+
+		//zero arguments - should give compile time error through a static assert
+		//SQLite::bind(query);
+
+		//bind one argument less than expected - should be fine.
+		//the unspecified argument should be set to null, not the default.
+		SQLite::bind(query, 1);
+		EXPECT_EQ(1, query.exec());
+		query.reset();
+
+		//bind all arguments - should work just fine
+		SQLite::bind(query, 2, "two");
+		EXPECT_EQ(1, query.exec());
+		query.reset();
+
+		//bind too many arguments - should throw.
+		EXPECT_THROW(SQLite::bind(query, 3, "three", 0), SQLite::Exception);
+		EXPECT_EQ(1, query.exec());
+	}
+
+	//make sure the content is as expected
+	{
+		using namespace std::string_literals;
+
+		SQLite::Statement query(db, "SELECT id, value FROM test ORDER BY id"s);
+		std::vector<std::pair<int, std::string> > results;
+		while (query.executeStep()) {
+			const int id = query.getColumn(0);
+			std::string value = query.getColumn(1);
+			results.emplace_back( id, std::move(value) );
+		}
+		EXPECT_EQ(std::size_t(3), results.size());
+
+		EXPECT_EQ(std::make_pair(1,""s), results.at(0));
+		EXPECT_EQ(std::make_pair(2,"two"s), results.at(1));
+		EXPECT_EQ(std::make_pair(3,"three"s), results.at(2));
+	}
+}
+#endif // c++14