tests: SVGAnalyzer: save a copy of the original SVG and give access to it

This is needed to be able to verify the SVG re-creating capablility of
the SVGAnalyzer.

Upcoming commits will extend the SVG analyzer's ability to handle new
SVG attributes and add new test cases verifying its ability to
re-create correct SVG containing those attributes. This change will
facilitate the creation of those tests and keep the code DRY.

The copying is necessary since the original SVG is modified by the XML
parser in destructive mode. See
http://rapidxml.sourceforge.net/manual.html#namespacerapidxml_1destructive_non_destructive
and we don't want to use the non-destructive mode since no entity
reference translation is done then and we want to avoid having to do
that ourselves.

diff --git a/tests/svg_analyzer.cpp b/tests/svg_analyzer.cpp
index 3e5db3edf0f92587de5027886ff6cfb0794dda80..9f69376ba53b4de914b21292248a6ea3bb712684 100644 (file)
--- a/tests/svg_analyzer.cpp
+++ b/tests/svg_analyzer.cpp
@@ -11,7 +11,7 @@
 #include <gvc++/GVRenderData.h>
 
 SVGAnalyzer::SVGAnalyzer(char *text)
-    : m_svg(SVG::SVGElement(SVG::SVGElementType::Svg)) {
+    : m_original_svg(text), m_svg(SVG::SVGElement(SVG::SVGElementType::Svg)) {
   m_elements_in_process.push_back(&m_svg);
   SvgppContext context{this};
   traverseDocumentWithSvgpp(context, text);
@@ -259,6 +259,8 @@ SVGAnalyzer SVGAnalyzer::make_from_dot(const std::string &dot_source,
   return SVGAnalyzer{result.c_str()};
 }
 
+std::string_view SVGAnalyzer::original_svg() const { return m_original_svg; }
+
 void SVGAnalyzer::set_transform(double a, double b, double c, double d,
                                 double e, double f) {
   current_element().attributes.transform = {a, b, c, d, e, f};

diff --git a/tests/svg_analyzer.h b/tests/svg_analyzer.h
index 22f7e3be8eb262ad365e94ecc5979b6b741db06c..dfbf39be44f53717981776ea00a423fcec7d1b13 100644 (file)
--- a/tests/svg_analyzer.h
+++ b/tests/svg_analyzer.h
@@ -72,6 +72,8 @@ public:
   std::size_t num_rects() const { return m_num_rects; };
   std::size_t num_texts() const { return m_num_texts; };
   std::size_t num_titles() const { return m_num_titles; };
+  /// Return a view of the original SVG
+  std::string_view original_svg() const;
   void set_graphviz_version(std::string_view version);
   void set_graphviz_build_date(std::string_view build_date);
   std::string svg_string(std::size_t indent_size = 2) const;
@@ -111,6 +113,8 @@ private:
   std::size_t m_num_titles = 0;
   /// A list of Graphviz recreated graphs
   std::vector<GraphvizGraph> m_graphs;
+  /// The original SVG document
+  std::string m_original_svg;
   /// The top level SVG `svg` element corresponding to the Graphviz graph
   SVG::SVGElement m_svg;
 };