JUnit default output stream

- string replacement function refactoring
- junit now determining the output stream based on available file
- junit does not replace existing file

include/boost/test/impl/junit_log_formatter.ipp

@@ -28,6 +28,7 @@
 #include <boost/test/results_collector.hpp>
 
 #include <boost/test/utils/algorithm.hpp>
+#include <boost/test/utils/string_cast.hpp>
 
 //#include <boost/test/results_reporter.hpp>
 
@@ -37,6 +38,7 @@
 
 // STL
 #include <iostream>
+#include <fstream>
 #include <set>
 
 #include <boost/test/detail/suppress_warnings.hpp>
@@ -604,6 +606,34 @@ junit_log_formatter::log_entry_context( std::ostream& ostr, const_string context
 
 //____________________________________________________________________________//
 
+
+std::string
+junit_log_formatter::get_default_stream_description() const {
+    std::string name = framework::master_test_suite().p_name.value;
+
+    static const std::string to_replace[] =  { " ", "\"", "/", "\\", ":"};
+    static const std::string replacement[] = { "_", "_" , "_", "_" , "_"};
+
+    name = unit_test::utils::replace_all_occurrences_of(
+        name,
+        to_replace, to_replace + sizeof(to_replace)/sizeof(to_replace[0]),
+        replacement, replacement + sizeof(replacement)/sizeof(replacement[0]));
+
+    std::ifstream check_init((name + ".xml").c_str());
+    if(!check_init)
+        return name + ".xml";
+
+    int index = 0;
+    for(; index < 100; index++) {
+      std::string candidate = name + "_" + utils::string_cast(index) + ".xml";
+      std::ifstream file(candidate.c_str());
+      if(!file)
+          return candidate;
+    }
+
+    return name + ".xml";
+}
+
 } // namespace output
 } // namespace unit_test
 } // namespace boost

include/boost/test/output/junit_log_formatter.hpp

@@ -114,6 +114,11 @@ public:
     {
     }
 
+    //! Instead of a regular stream, returns a file name corresponding to
+    //! the current master test suite. If the file already exists, adds an index
+    //! to it.
+    virtual std::string  get_default_stream_description() const;
+
 
 private:
     typedef std::map<test_unit_id, junit_impl::junit_log_helper> map_trace_t;