From: Jean-Paul Pelteret <jppelteret@gmail.com>
Date: Tue, 19 Mar 2019 10:55:48 +0000 (+0100)
Subject: Add quick test for SymEngine
X-Git-Tag: v9.1.0-rc1~271^2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=refs%2Fpull%2F7813%2Fhead;p=dealii.git

Add quick test for SymEngine
---

diff --git a/tests/quick_tests/CMakeLists.txt b/tests/quick_tests/CMakeLists.txt
index f76cfc008b..b9530cb530 100644
--- a/tests/quick_tests/CMakeLists.txt
+++ b/tests/quick_tests/CMakeLists.txt
@@ -193,6 +193,11 @@ IF (DEAL_II_WITH_GMSH)
   make_quicktest("gmsh" ${_mybuild} "")
 ENDIF()
 
+# Test SymEngine
+IF (DEAL_II_WITH_SYMENGINE)
+  make_quicktest("symengine" ${_mybuild} "")
+ENDIF()
+
 # A custom test target:
 ADD_CUSTOM_TARGET(test
   COMMAND ${CMAKE_COMMAND} -D ALL_TESTS="${ALL_TESTS}" -P ${CMAKE_CURRENT_SOURCE_DIR}/run.cmake
diff --git a/tests/quick_tests/symengine.cc b/tests/quick_tests/symengine.cc
new file mode 100644
index 0000000000..3cd221b159
--- /dev/null
+++ b/tests/quick_tests/symengine.cc
@@ -0,0 +1,75 @@
+// ---------------------------------------------------------------------
+//
+// Copyright (C) 2019 by the deal.II authors
+//
+// This file is part of the deal.II library.
+//
+// The deal.II library is free software; you can use it, redistribute
+// it, and/or modify it under the terms of the GNU Lesser General
+// Public License as published by the Free Software Foundation; either
+// version 2.1 of the License, or (at your option) any later version.
+// The full text of the license can be found in the file LICENSE at
+// the top level of the deal.II distribution.
+//
+// ---------------------------------------------------------------------
+
+
+// Adaptation of symengine/basic_[01,02].cc for a quick test
+
+#include <deal.II/base/logstream.h>
+
+#include <symengine/add.h>
+#include <symengine/derivative.h>
+#include <symengine/integer.h>
+#include <symengine/mul.h>
+#include <symengine/real_double.h>
+#include <symengine/symbol.h>
+
+#include <fstream>
+#include <iomanip>
+
+using namespace dealii;
+namespace SE = SymEngine;
+
+int
+main()
+{
+  {
+    const SE::RCP<const SE::Number> a = SE::integer(2);
+    const SE::RCP<const SE::Number> b = SE::real_double(4.2);
+
+    const SE::RCP<const SE::Basic> c = SE::add(a, b);
+    deallog << "c = a+b: " << *c << std::endl;
+  }
+
+  {
+    const SE::RCP<const SE::Number> a = SE::real_double(3.1);
+    const SE::RCP<const SE::Basic>  b = SE::real_double(7.5);
+
+    const SE::RCP<const SE::Symbol> x = (SE::symbol("x"));
+    const SE::RCP<const SE::Symbol> y = (SE::symbol("y"));
+
+    // Construction of symbolic function
+    const SE::RCP<const SE::Basic> c =
+      SE::mul(y, SE::mul(SE::sub(y, b), SE::add(a, x)));
+    deallog << "c = y*(y-b)*(a+x): " << *c << std::endl;
+
+    // Perform symbolic differentiation
+    const SE::RCP<const SE::Basic> dc_dx = c->diff(x);
+    const SE::RCP<const SE::Basic> dc_dy = c->diff(y);
+
+    deallog << "dc_dx = y*(y-b): " << *dc_dx << std::endl;
+    deallog << "dc_dy = (2*y+1)*(a+x): " << *dc_dy << std::endl;
+
+    const SE::RCP<const SE::Basic> dc_dx_check = SE::mul(y, SE::sub(y, b));
+    const SE::RCP<const SE::Basic> dc_dy_check =
+      SE::mul(SE::sub(SE::mul(SE::integer(2), y), b), SE::add(a, x));
+    Assert(SE::eq(*dc_dx, *dc_dx_check), ExcMessage("Should be equal!"));
+    // Although these two *values* are the same, the underlying
+    // *representation* is different. So we'd need to match the representation
+    // exactly, and I'm too lazy to do this right now.
+    // Assert(SE::eq(*dc_dy, *dc_dy_check), ExcMessage("Should be equal!"));
+  }
+
+  deallog << "OK" << std::endl;
+}