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diff --git a/fuzzylite/test/term/TriangleTest.cpp b/fuzzylite/test/term/TriangleTest.cpp
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+++ b/fuzzylite/test/term/TriangleTest.cpp
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+/*
+ fuzzylite (R), a fuzzy logic control library in C++.
+ Copyright (C) 2010-2017 FuzzyLite Limited. All rights reserved.
+ Author: Juan Rada-Vilela, Ph.D. <jcrada@fuzzylite.com>
+
+ This file is part of fuzzylite.
+
+ fuzzylite is free software: you can redistribute it and/or modify it under
+ the terms of the FuzzyLite License included with the software.
+
+ You should have received a copy of the FuzzyLite License along with
+ fuzzylite. If not, see <http://www.fuzzylite.com/license/>.
+
+ fuzzylite is a registered trademark of FuzzyLite Limited.
+ */
+
+#include "test/catch.hpp"
+#include "fl/Headers.h"
+
+namespace fl {
+
+    /**
+     * Tests: term/Triangle
+     *
+     * @author Juan Rada-Vilela, Ph.D.
+     *
+     */
+
+    TEST_CASE("triangle can be open ended with -infinity", "[term][triangle]") {
+        Triangle triangle("A", -fl::inf, 0, 1);
+        Ramp ramp("a", 1, 0);
+        for (int i = -10; i < 2; ++i) {
+            FL_DBG("A(" << i << ")=" << triangle.membership(i));
+            FL_DBG("a(" << i << ")=" << ramp.membership(i));
+            REQUIRE(Op::isEq(triangle.membership(i), ramp.membership(i)));
+        }
+        REQUIRE(Op::isEq(triangle.membership(-fl::inf), 1.0));
+        REQUIRE(Op::isEq(triangle.membership(fl::inf), 0.0));
+    }
+
+    TEST_CASE("triangle can be open ended with +infinity", "[term][triangle]") {
+        Triangle triangle("A", 0, 1, fl::inf);
+        Ramp ramp("a", 0, 1);
+        for (int i = 10; i >= -2; --i) {
+            FL_DBG("A(" << i << ")=" << triangle.membership(i));
+            FL_DBG("a(" << i << ")=" << ramp.membership(i));
+            REQUIRE(Op::isEq(triangle.membership(i), ramp.membership(i)));
+        }
+        REQUIRE(Op::isEq(triangle.membership(fl::inf), 1.0));
+        REQUIRE(Op::isEq(triangle.membership(-fl::inf), 0.0));
+    }
+
+    TEST_CASE("triangle defuzzification is correct", "[term][triangle]") {
+        Triangle a("A", 0, 1, 2);
+        Triangle b("B", 1, 2, 3);
+        AlgebraicProduct times;
+        Aggregated x("X", 0, 3, new AlgebraicSum);
+        x.addTerm(&a, 1, &times);
+        x.addTerm(&b, 1, &times);
+        Centroid c(101);
+        FL_LOG(c.defuzzify(&x, 0, 3));
+
+        Triangle t("T", 0, 0, 1);
+        FL_LOG(c.defuzzify(&t, 0, 1));
+    }
+}