Basic harness for unit tests

Adds catch.hpp - a test harness for writing and running unit tests.
Updated the make file so that running `make test` runs all the tests. I
removed all the tests that either didn't compile, failing on running or
didn't terminate without some input.

Added an example catch test to demonstrate it working.

unit/Makefile

@@ -1,24 +1,17 @@
-SRC = cpp_parser.cpp \
+.PHONY: all cprover.dir test
-      cpp_scanner.cpp \
+
-      elf_reader.cpp \
+SRC = catch_entry_point.cpp \
-      float_utils.cpp \
+      catch_example.cpp \
-      ieee_float.cpp \
-      json.cpp \
-      miniBDD.cpp \
-      osx_fat_reader.cpp \
-      sharing_map.cpp \
-      sharing_node.cpp \
-      smt2_parser.cpp \
-      string_utils.cpp \
-      unicode.cpp \
-      wp.cpp \
       # Empty last line
 
-INCLUDES= -I ../src/
+INCLUDES= -I ../src/ -I.
 
 include ../src/config.inc
 include ../src/common
 
+cprover.dir:
+	$(MAKE) $(MAKEARGS) -C ../src
+
 LIBS = ../src/ansi-c/ansi-c$(LIBEXT) \
        ../src/cpp/cpp$(LIBEXT) \
        ../src/json/json$(LIBEXT) \
@@ -31,52 +24,33 @@ LIBS = ../src/ansi-c/ansi-c$(LIBEXT) \
        ../src/assembler/assembler$(LIBEXT) \
        ../src/analyses/analyses$(LIBEXT) \
        ../src/solvers/solvers$(LIBEXT) \
+       # Empty last line
 
-CLEANFILES = $(SRC:.cpp=$(EXEEXT))
+TESTS = catch_entry_point$(EXEEXT) \
+        miniBDD$(EXEEXT) \
+        string_utils$(EXEEXT) \
+        sharing_node$(EXEEXT) \
+        # Empty last line
+
+CLEANFILES = $(TESTS)
+
+all: cprover.dir
+	$(MAKE) $(MAKEARGS) $(TESTS)
+
+test: all
+	$(foreach test,$(TESTS), (echo Running: $(test); ./$(test)) &&) true
 
-all: $(SRC:.cpp=$(EXEEXT))
 
 ###############################################################################
 
-cpp_parser$(EXEEXT): cpp_parser$(OBJEXT)
+catch_entry_point$(EXEEXT): $(OBJ)
-	$(LINKBIN)
-
-cpp_scanner$(EXEEXT): cpp_scanner$(OBJEXT)
-	$(LINKBIN)
-
-elf_reader$(EXEEXT): elf_reader$(OBJEXT)
-	$(LINKBIN)
-
-float_utils$(EXEEXT): float_utils$(OBJEXT)
-	$(LINKBIN)
-
-ieee_float$(EXEEXT): ieee_float$(OBJEXT)
-	$(LINKBIN)
-
-json$(EXEEXT): json$(OBJEXT)
 	$(LINKBIN)
 
 miniBDD$(EXEEXT): miniBDD$(OBJEXT)
 	$(LINKBIN)
 
-osx_fat_reader$(EXEEXT): osx_fat_reader$(OBJEXT)
-	$(LINKBIN)
-
-smt2_parser$(EXEEXT): smt2_parser$(OBJEXT)
-	$(LINKBIN)
-
-wp$(EXEEXT): wp$(OBJEXT)
-	$(LINKBIN)
-
 string_utils$(EXEEXT): string_utils$(OBJEXT)
 	$(LINKBIN)
 
-sharing_map$(EXEEXT): sharing_map$(OBJEXT)
-	$(LINKBIN)
-
 sharing_node$(EXEEXT): sharing_node$(OBJEXT)
 	$(LINKBIN)
-
-unicode$(EXEEXT): unicode$(OBJEXT)
-	$(LINKBIN)
-

unit/catch_entry_point.cpp

@@ -0,0 +1,15 @@
+/*******************************************************************\
+
+ Module: Catch Tests
+
+ Author: DiffBlue Limited. All rights reserved.
+
+\*******************************************************************/
+#ifndef CATCH_ENTRY_POINT_H
+#define CATCH_ENTRY_POINT_H
+
+#define CATCH_CONFIG_MAIN
+#include "catch.hpp"
+
+
+#endif // CATCH_ENTRY_POINT_H

unit/catch_example.cpp

@@ -0,0 +1,25 @@
+/*******************************************************************\
+
+ Module: Example Catch Tests
+
+ Author: DiffBlue Limited. All rights reserved.
+
+\*******************************************************************/
+
+#include <catch.hpp>
+
+unsigned int Factorial(unsigned int number)
+{
+  return number>1?Factorial(number-1)*number:1;
+}
+
+// This is an example unit test to demonstrate the build system and the
+// catch unit test framework. The source code is taken from the documentation
+// of catch.
+TEST_CASE("Factorials are computed", "[core][factorial]")
+{
+  REQUIRE(Factorial(1)==1);
+  REQUIRE(Factorial(2)==2);
+  REQUIRE(Factorial(3)==6);
+  REQUIRE(Factorial(10)==3628800);
+}