Switched ConnectionConfig to QString from std::string to fit better into Qt framework

tests/pglabtests/tst_escapeConnectionStringValue.cpp

@@ -0,0 +1,57 @@
+#include <gtest/gtest.h>
+#include <gmock/gmock-matchers.h>
+#include "ConnectionConfig.h"
+#include "PrintTo_Qt.h"
+
+using namespace testing;
+
+
+TEST(escapeConnectionStringValue, emptyValue)
+{
+	auto input = QStringLiteral("");
+	auto expected =	QStringLiteral("''");
+
+	auto result = ConnectionConfig::escapeConnectionStringValue(input);
+
+	ASSERT_EQ(result, expected);
+}
+
+TEST(escapeConnectionStringValue, simpleValue)
+{
+	auto input = QStringLiteral("abc");
+	auto expected =	QStringLiteral("abc");
+
+	auto result = ConnectionConfig::escapeConnectionStringValue(input);
+
+	ASSERT_EQ(result, expected);
+}
+
+TEST(escapeConnectionStringValue, valueWithSpace)
+{
+	auto input = QStringLiteral("ab c");
+	auto expected =	QStringLiteral("'ab c'");
+
+	auto result = ConnectionConfig::escapeConnectionStringValue(input);
+
+	ASSERT_EQ(result, expected);
+}
+
+TEST(escapeConnectionStringValue, valueWithQuote)
+{
+	auto input = QStringLiteral("ab'c");
+	auto expected =	QStringLiteral("'ab\\'c'");
+
+	auto result = ConnectionConfig::escapeConnectionStringValue(input);
+
+	ASSERT_EQ(result, expected);
+}
+
+TEST(escapeConnectionStringValue, valueBackslash)
+{
+	auto input = QStringLiteral("ab\\c");
+	auto expected =	QStringLiteral("'ab\\\\c'");
+
+	auto result = ConnectionConfig::escapeConnectionStringValue(input);
+
+	ASSERT_EQ(result, expected);
+}