Adding leakage model

tests/test_leakage.cpp

@@ -0,0 +1,93 @@
+/*
+ ******************************************************************************
+ Project:      OWA EPANET
+ Version:      2.3
+ Module:       test_leakage.cpp
+ Description:  Tests EPANET toolkit api functions
+ Authors:      see AUTHORS
+ Copyright:    see AUTHORS
+ License:      see LICENSE
+ Last Updated: 06/26/2024
+ ******************************************************************************
+*/
+
+/*
+   Tests Pipe Leakage Feature
+*/
+
+#include <boost/test/unit_test.hpp>
+
+#include "test_toolkit.hpp"
+
+BOOST_AUTO_TEST_SUITE (test_leakage)
+
+BOOST_AUTO_TEST_CASE(test_leakage_model)
+
+//#include <stdio.h>
+//#include <math.h>
+//#include "epanet2_2.h"
+
+//int main()
+{
+    int error = 0;
+    int Pipe21, Junc21, Junc22;
+	double pipe21Leak, junc21Leak, junc22Leak;
+    EN_Project ph = NULL;
+
+    error = EN_createproject(&ph);
+    BOOST_REQUIRE(error == 0);
+    error = EN_open(ph, DATA_PATH_NET1, DATA_PATH_RPT, "");
+//    error = EN_open(ph, "Net1.inp", "Net1.rpt", "");
+    BOOST_REQUIRE(error == 0);
+    
+    //  single period analysis
+    error = EN_settimeparam(ph, EN_DURATION, 0);
+    BOOST_REQUIRE(error == 0);
+
+    // Get index of Pipe 21
+    error = EN_getlinkindex(ph, "21", &Pipe21);
+    BOOST_REQUIRE(error == 0);
+
+    // Set Pipe21 leak area to 1.0 sq mm per 100 ft of pipe
+    // and its expansion rate to 0.1 sq mm per ft of head
+    error = EN_setlinkvalue(ph, Pipe21, EN_LEAK_AREA, 1.0);
+    BOOST_REQUIRE(error == 0);
+    error = EN_setlinkvalue(ph, Pipe21, EN_LEAK_EXPAN, 0.1);
+    BOOST_REQUIRE(error == 0);
+
+    // Solve for hydraulics
+    error = EN_solveH(ph);
+    BOOST_REQUIRE(error == 0);
+
+    // Compute Pipe 21 leakage flow using the FAVAD formula
+    // Note: we can't just sum the leak rates at both end nodes
+    //       together since in general the nodes can have leakage
+    //       contributed by other connecting pipes.
+    error = EN_getlinkvalue(ph, Pipe21, EN_LINK_LEAKAGE, &pipe21Leak);
+    BOOST_REQUIRE(error == 0);
+//    printf("\n Pipe leakage flow: %.4f", pipe21Leak);
+
+	// Retrieve leakage flow at end nodes
+    // Note: In this case all of the leakage at these nodes is from Pipe 21.
+    error = EN_getnodeindex(ph, "21", &Junc21);
+    BOOST_REQUIRE(error == 0);
+    error = EN_getnodeindex(ph, "22", &Junc22);
+    BOOST_REQUIRE(error == 0);
+	error = EN_getnodevalue(ph, Junc21, EN_LEAKAGEFLOW, &junc21Leak);
+    BOOST_REQUIRE(error == 0);
+	error = EN_getnodevalue(ph, Junc22, EN_LEAKAGEFLOW, &junc22Leak);
+    BOOST_REQUIRE(error == 0);
+
+	// Check that the sum of the node leakages equals the pipe leakage
+	//printf("\n Node leakage flow: %.4f\n", junc21Leak + junc22Leak);
+    BOOST_REQUIRE(abs(pipe21Leak - (junc21Leak+junc22Leak)) < 0.01);
+
+// Clean up
+    error = EN_close(ph);
+    BOOST_REQUIRE(error == 0);
+    error = EN_deleteproject(ph);
+    BOOST_REQUIRE(error == 0);
+//    return 0;
+}
+
+BOOST_AUTO_TEST_SUITE_END()