Add headers for different sets of unit tests (TriBITSPub#483)

This is to make the file easier to navigate so I can add more unit tests.

This file has gotten way too big and needs to be broken into several smaller
files at some point here.

test/core/TestingFunctionMacro_UnitTests.cmake

@@ -66,28 +66,23 @@ include(GlobalNullSet)
 include(AppendStringVar)
 
 
-#####################################################################
+################################################################################
 #
-# Unit tests for tribits_add_xxx(...) CMake commands run as CMake code
+# Unit tests for a collection of TriBITS Core CMake code
 #
-# This file contains a set of unit tests for the package_arch macros
-# tribits_add_xxx(...) functions.  These unit tests are written in CMake
-# itself.  This is not a very advanced unit testing system and it not that
-# easy to work with.  However, it does perform some pretty strong testing and
-# is much better than doing nothing.
+# These unit tests are written in CMake itself.  This is not a very advanced
+# unit testing system and it not that easy to work with.  However, it does
+# perform some pretty strong testing and is much better than doing nothing.
+# Each set of tests is in a function scope so as not to impact other tests.
 #
-#####################################################################
+################################################################################
 
 
+################################################################################
 #
-# Set up unit test functions that will be called below to actually run the
-# unit tests.
-#
-# The reason that we use functions is so that we can change variables just
-# inside of the functions that have their own variable scoping.  In that way,
-# we can keep variables that are set in one unit test from affecting the
-# others.
+# Testing misc functions and macros
 #
+################################################################################
 
 
 function(unittest_append_string_var)
@@ -670,6 +665,13 @@ function(unittest_tribits_report_invalid_tribits_usage)
 endfunction()
 
 
+################################################################################
+#
+# Testing tribits_add_test()
+#
+################################################################################
+
+
 function(unittest_tribits_add_test_basic)
 
   message("\n***")
@@ -2314,6 +2316,13 @@ function(unittest_tribits_add_test_properties)
 endfunction()
 
 
+################################################################################
+#
+# Testing tribits_add_advanced_test()
+#
+################################################################################
+
+
 function(unittest_tribits_add_advanced_test_basic)
 
   message("\n***")
@@ -4118,6 +4127,13 @@ function(unittest_tribits_add_executable_and_test)
 endfunction()
 
 
+################################################################################
+#
+# Testing TriBITS ETI support code
+#
+################################################################################
+
+
 function(unittest_tribits_eti_type_expansion)
 
   message("*** Test passing invalid arguments to tribits_eti_type_expansion( ... )\n")
@@ -4265,6 +4281,7 @@ function(unittest_tribits_add_eti_instantiations_initial)
 
 endfunction()
 
+
 function(unittest_tribits_add_eti_instantiations_cumulative)
 
   set(package ${PROJECT_NAME}Framework)
@@ -4346,6 +4363,7 @@ function(unittest_tribits_eti_explode)
 
 endfunction()
 
+
 function(unittest_tribits_eti_mangle_symbol)
 
   message("*** Testing ETI Mangling ***")
@@ -4469,9 +4487,12 @@ function(unittest_tribits_eti_generate_macros)
 
 endfunction()
 
+
+################################################################################
 #
 # Execute the unit tests
 #
+################################################################################
 
 # Set up some global environment stuff
 set(${PROJECT_NAME}_HOSTNAME testhost.nowhere.com)
@@ -4487,7 +4508,7 @@ set( TRIBITS_ADD_TEST_ADD_TEST_UNITTEST TRUE )
 set( TRIBITS_ADD_TEST_ADD_TEST_CAPTURE TRUE )
 
 message("\n***")
-message("*** Running little bits of tests")
+message("*** Testing misc TriBITS functions and macros")
 message("***\n")
 
 unittest_append_string_var()