add Chapter 15 - runtime observer implementation

Chapter15/observer/libs/etl/test/UnitTest++/Checks.cpp

@@ -0,0 +1,50 @@
+#include "Checks.h"
+#include <cstring>
+
+namespace UnitTest {
+
+   namespace {
+
+      void CheckStringsEqual(TestResults& results, char const* expected, char const* actual,
+                             TestDetails const& details)
+      {
+         using namespace std;
+
+         if ((expected && actual) ? strcmp(expected, actual) : (expected || actual))
+         {
+            UnitTest::MemoryOutStream stream;
+            stream << "Expected " << (expected ? expected : "<NULLPTR>") << " but was " << (actual ? actual : "<NULLPTR>");
+
+            results.OnTestFailure(details, stream.GetText());
+         }
+      }
+
+   }
+
+
+   void CheckEqual(TestResults& results, char const* expected, char const* actual,
+                   TestDetails const& details)
+   {
+      CheckStringsEqual(results, expected, actual, details);
+   }
+
+   void CheckEqual(TestResults& results, char* expected, char* actual,
+                   TestDetails const& details)
+   {
+      CheckStringsEqual(results, expected, actual, details);
+   }
+
+   void CheckEqual(TestResults& results, char* expected, char const* actual,
+                   TestDetails const& details)
+   {
+      CheckStringsEqual(results, expected, actual, details);
+   }
+
+   void CheckEqual(TestResults& results, char const* expected, char* actual,
+                   TestDetails const& details)
+   {
+      CheckStringsEqual(results, expected, actual, details);
+   }
+
+
+}