Adding comment test

tests/test_curve.cpp

@@ -0,0 +1,40 @@
+/*
+ ******************************************************************************
+ Project:      OWA EPANET
+ Version:      2.2
+ Module:       test_curve.cpp
+ Description:  Tests EPANET toolkit api functions
+ Authors:      see AUTHORS
+ Copyright:    see AUTHORS
+ License:      see LICENSE
+ Last Updated: 03/21/2019
+ ******************************************************************************
+*/
+
+#include <boost/test/unit_test.hpp>
+
+#include "test_toolkit.hpp"
+
+
+BOOST_AUTO_TEST_SUITE (curve)
+
+BOOST_FIXTURE_TEST_CASE(test_curve_comments, FixtureOpenClose)
+{
+    int index;
+    char comment[EN_MAXMSG + 1];
+
+    // Set curve comments
+    error = EN_getcurveindex(ph, (char *)"1", &index);
+    BOOST_REQUIRE(error == 0);
+    error = EN_setcomment(ph, EN_CURVE, index, (char *)"Curve 1");
+    BOOST_REQUIRE(error == 0);
+
+    // Check curve comments
+    error = EN_getcurveindex(ph, (char *)"1", &index);
+    BOOST_REQUIRE(error == 0);
+    error = EN_getcomment(ph, EN_CURVE, index, comment);
+    BOOST_REQUIRE(error == 0);
+    BOOST_CHECK(check_string(comment, (char *)"Curve 1"));
+}
+
+BOOST_AUTO_TEST_SUITE_END()