Add missing file from previous commit

com.oracle.truffle.r.test/src/com/oracle/truffle/r/test/library/utils/TestTrace.java

+/*
+ * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package com.oracle.truffle.r.test.library.utils;
+
+import org.junit.Test;
+
+import com.oracle.truffle.r.test.TestBase;
+
+public class TestTrace extends TestBase {
+    private static final String FASTR_TRACE = "(if (exists('.fastr.trace')) .fastr.trace else trace)";
+    private static final String PLAIN_TRACE = "trace";
+    private static final String[] TRACE_VARIANTS = new String[]{PLAIN_TRACE, FASTR_TRACE};
+
+    @Test
+    public void testSimple() {
+        assertEval(template("f <- function(x) {}; %0(f); f()", TRACE_VARIANTS));
+    }
+
+    @Test
+    public void testSimpleTrace() {
+        assertEval(template("f <- function(x) {}; %0(f, tracer=quote(print(x))); f(100)", TRACE_VARIANTS));
+    }
+
+    @Test
+    public void testMultiTrace() {
+        assertEval(template("f <- function(x) {}; %0(f, tracer=quote(print(x))); g <- function() for (i in 1:10) f(i); g()", TRACE_VARIANTS));
+    }
+
+    @Test
+    public void testCondTrace() {
+        assertEval(template("f <- function(x) {}; %0(f, tracer=quote(if (x == 3 || x == 7) print(x))); g <- function() for (i in 1:10) f(i); g()", TRACE_VARIANTS));
+    }
+
+}