Update README and add contrib dir

contrib/trace/test/trace-test-suite.cc

@@ -0,0 +1,86 @@
+
+// Include a header file from your module to test.
+#include "ns3/animation-trace.h"
+
+// An essential include is test.h
+#include "ns3/test.h"
+
+// Do not put your test classes in namespace ns3.  You may find it useful
+// to use the using directive to access the ns3 namespace directly
+using namespace ns3;
+
+// Add a doxygen group for tests.
+// If you have more than one test, this should be in only one of them.
+/**
+ * \defgroup animation-trace-tests Tests for animation-trace
+ * \ingroup animation-trace
+ * \ingroup tests
+ */
+
+// This is an example TestCase.
+/**
+ * \ingroup animation-trace-tests
+ * Test case for feature 1
+ */
+class AnimationTraceTestCase1 : public TestCase
+{
+  public:
+    AnimationTraceTestCase1();
+    virtual ~AnimationTraceTestCase1();
+
+  private:
+    void DoRun() override;
+};
+
+// Add some help text to this case to describe what it is intended to test
+AnimationTraceTestCase1::AnimationTraceTestCase1()
+    : TestCase("AnimationTrace test case (does nothing)")
+{
+}
+
+// This destructor does nothing but we include it as a reminder that
+// the test case should clean up after itself
+AnimationTraceTestCase1::~AnimationTraceTestCase1()
+{
+}
+
+//
+// This method is the pure virtual method from class TestCase that every
+// TestCase must implement
+//
+void
+AnimationTraceTestCase1::DoRun()
+{
+    // A wide variety of test macros are available in src/core/test.h
+    NS_TEST_ASSERT_MSG_EQ(true, true, "true doesn't equal true for some reason");
+    // Use this one for floating point comparisons
+    NS_TEST_ASSERT_MSG_EQ_TOL(0.01, 0.01, 0.001, "Numbers are not equal within tolerance");
+}
+
+// The TestSuite class names the TestSuite, identifies what type of TestSuite,
+// and enables the TestCases to be run.  Typically, only the constructor for
+// this class must be defined
+
+/**
+ * \ingroup animation-trace-tests
+ * TestSuite for module animation-trace
+ */
+class AnimationTraceTestSuite : public TestSuite
+{
+  public:
+    AnimationTraceTestSuite();
+};
+
+AnimationTraceTestSuite::AnimationTraceTestSuite()
+    : TestSuite("animation-trace", UNIT)
+{
+    // TestDuration for TestCase can be QUICK, EXTENSIVE or TAKES_FOREVER
+    AddTestCase(new AnimationTraceTestCase1, TestCase::QUICK);
+}
+
+// Do not forget to allocate an instance of this TestSuite
+/**
+ * \ingroup animation-trace-tests
+ * Static variable for test initialization
+ */
+static AnimationTraceTestSuite sanimationTraceTestSuite;