Reorganizing unit tests

Unit tests for the toolkit are consolidated into one test module with a separate test suite for related API functions.

tests/test_toolkit.cpp

@@ -0,0 +1,65 @@
+/*
+ ******************************************************************************
+ Project:      OWA EPANET
+ Version:      2.2
+ Module:       test_toolkit.cpp
+ Description:  Tests EPANET toolkit api functions
+ Authors:      see AUTHORS
+ Copyright:    see AUTHORS
+ License:      see LICENSE
+ Last Updated: 03/21/2019
+ ******************************************************************************
+*/
+
+
+#define BOOST_TEST_MODULE toolkit
+#define BOOST_ALL_DYN_LINK
+
+#include <boost/test/unit_test.hpp>
+
+#include "test_toolkit.hpp"
+
+
+// Custom test to check the minimum number of correct decimal digits between
+// the test and the ref vectors.
+boost::test_tools::predicate_result check_cdd_double(std::vector<double>& test,
+    std::vector<double>& ref, long cdd_tol){
+    double tmp, min_cdd = 10.0;
+
+    // TODO: What if the vectors aren't the same length?
+
+    std::vector<double>::iterator test_it;
+    std::vector<double>::iterator ref_it;
+
+    for (test_it = test.begin(), ref_it = ref.begin();
+        (test_it < test.end()) && (ref_it < ref.end());
+        ++test_it, ++ref_it)
+    {
+        if (*test_it != *ref_it) {
+            // Compute log absolute error
+            tmp = abs(*test_it - *ref_it);
+            if (tmp < 1.0e-7)
+                tmp = 1.0e-7;
+
+            else if (tmp > 2.0)
+                tmp = 1.0;
+
+            tmp = -log10(tmp);
+            if (tmp < 0.0)
+                tmp = 0.0;
+
+            if (tmp < min_cdd)
+                min_cdd = tmp;
+        }
+    }
+
+    return floor(min_cdd) >= cdd_tol;
+}
+
+boost::test_tools::predicate_result check_string(std::string test, std::string ref)
+{
+    if (ref.compare(test) == 0)
+        return true;
+    else
+        return false;
+}