fixed natspec evaluator result on error

libnatspec/NatspecExpressionEvaluator.cpp

@@ -52,7 +52,8 @@ QString NatspecExpressionEvaluator::evalExpression(QString const& _expression)
 	QJSValue result = m_engine.evaluate("evaluateExpression(\"" + _expression + "\")");
 	if (result.isError())
 	{
-		cerr << "Could not evaluate expression: " << _expression.toStdString() << ". result: " << result.toString().toStdString() << endl;
+		cerr << "Could not evaluate expression: \"" << _expression.toStdString() << "\"" << endl;
+		return _expression;
 	}
 	return result.toString();
 }

test/natspec.cpp

@@ -62,7 +62,6 @@ BOOST_AUTO_TEST_CASE(natspec_create_custom_function)
 	// given
 	NatspecExpressionEvaluator e;
 
-	
 	// when
 	auto x = e.evalExpression("`test = function (x) { return x + 'ok'; }`"); // ommit var, make it global
 	string result = e.evalExpression("`test(5)`").toStdString();
@@ -121,4 +120,18 @@ BOOST_AUTO_TEST_CASE(natspec_js_eval_input_params)
 	BOOST_CHECK_EQUAL(result, "Will multiply 4 by 7 and return 28.");
 }
 
+BOOST_AUTO_TEST_CASE(natspec_js_eval_error)
+{
+	cnote << "testing natspec evaluation of incorrect input";
+
+	// given
+	NatspecExpressionEvaluator e;
+
+	// when
+	string result = e.evalExpression("`test(`").toStdString();
+
+	// then
+	BOOST_CHECK_EQUAL(result, "`test(`");
+}
+
 BOOST_AUTO_TEST_SUITE_END()