Test cmd history support

test/Driver/CommandHistory.C

@@ -0,0 +1,36 @@
+//------------------------------------------------------------------------------
+// CLING - the C++ LLVM-based InterpreterG :)
+//
+// This file is dual-licensed: you can choose to license it under the University
+// of Illinois Open Source License or the GNU Lesser General Public License. See
+// LICENSE.TXT for details.
+//------------------------------------------------------------------------------
+
+// clang-format off
+// RUN: %rm /tmp/__testing_cling_history
+// RUN: cat %s | env --unset=CLING_NOHISTORY CLING_HISTSIZE=8 CLING_HISTFILE="/tmp/__testing_cling_history" %cling - 2>&1
+// RUN: diff /tmp/__testing_cling_history "%S/Inputs/cling_history"
+// REQUIRES: not_system-windows
+
+#include <iostream>
+
+int i = 8;
+
+template<class T>
+struct type_a {
+	const T t;
+	double d;
+
+/*
+		comment
+ * */
+
+	static const int i = 37;
+};
+
+// another comment
+
+using std::cout;
+
+std::cout << "test\n";
+

test/Driver/Inputs/cling_history

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+/*
+comment
+ * */
+static const int i = 37;
+};
+// another comment
+using std::cout;
+std::cout << "test\n";