add Chapter 15 - runtime observer implementation

Chapter15/observer/libs/etl/test/UnitTest++/TimeConstraint.h

@@ -0,0 +1,37 @@
+#ifndef UNITTEST_TIMECONSTRAINT_H
+#define UNITTEST_TIMECONSTRAINT_H
+
+#include "TimeHelpers.h"
+#include "HelperMacros.h"
+#include "TestDetails.h"
+
+namespace UnitTest {
+
+   class TestResults;
+
+   class UNITTEST_LINKAGE TimeConstraint
+   {
+   public:
+      TimeConstraint(int ms, TestDetails const& details, int lineNumber);
+      ~TimeConstraint();
+
+   private:
+      void operator=(TimeConstraint const&);
+      TimeConstraint(TimeConstraint const&);
+
+      Timer m_timer;
+      TestDetails const m_details;
+      int const m_maxMs;
+   };
+
+   #define UNITTEST_TIME_CONSTRAINT(ms) \
+      UnitTest::TimeConstraint unitTest__timeConstraint__(ms, m_details, __LINE__)
+
+   #define UNITTEST_TIME_CONSTRAINT_EXEMPT() \
+      UNITTEST_MULTILINE_MACRO_BEGIN         \
+      m_details.timeConstraintExempt = true; \
+      UNITTEST_MULTILINE_MACRO_END
+
+}
+
+#endif