1 files changed, 53 insertions, 0 deletions
diff --git a/fuzzylite/test/term/TrapezoidTest.cpp b/fuzzylite/test/term/TrapezoidTest.cpp
new file mode 100644
index 0000000..8581ac1
--- /dev/null
+++ b/fuzzylite/test/term/TrapezoidTest.cpp
@@ -0,0 +1,53 @@
+/*
+ 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/Trapezoid
+     *
+     * @author Juan Rada-Vilela, Ph.D.
+     *
+     */
+
+    TEST_CASE("trapezoid can be open ended with -infinity", "[term][trapezoid]") {
+        Trapezoid trapezoid("A", -fl::inf, 0, 1, 2);
+        Ramp ramp("a", 2, 1);
+        //(-inf, inf)
+        for (scalar i = -10.0; Op::isLE(i, 10.0); i += .2) {
+            FL_DBG("A(" << i << ")=" << trapezoid.membership(i));
+            FL_DBG("a(" << i << ")=" << ramp.membership(i));
+            REQUIRE(Op::isEq(trapezoid.membership(i), ramp.membership(i)));
+        }
+        REQUIRE(Op::isEq(trapezoid.membership(-fl::inf), 1.0));
+        REQUIRE(Op::isEq(trapezoid.membership(fl::inf), 0.0));
+    }
+
+    TEST_CASE("trapezoid can be open ended with +infinity", "[term][trapezoid]") {
+        Trapezoid trapezoid("A", 0, 1, 2, fl::inf);
+        Ramp ramp("a", 0, 1);
+        //(-inf, inf)
+        for (scalar i = -10.0; Op::isLE(i, 10.0); i += .2) {
+            REQUIRE(Op::isEq(trapezoid.membership(i), ramp.membership(i)));
+        }
+        REQUIRE(Op::isEq(trapezoid.membership(fl::inf), 1.0));
+        REQUIRE(Op::isEq(trapezoid.membership(-fl::inf), 0.0));
+    }
+
+}