Refactor test/ directory to match the rest of the project.

The prior PR didn't touch this directory because it was getting too big
and I wanted the diff to be smaller for the test directory. Now addressing
that.

Signed-off-by: Yuval Peress <peress@google.com>

test/CMakeLists.txt

@@ -4,34 +4,38 @@
 # Create a list of common files needed for tests
 set(
   COMMON_FILE_LIST
-    c_test_framework.h
-    test_cases.include
+    include/c_test_framework.h
+    src/test_cases.include
 )
 
 # Create the C test executable
-add_executable(c_test fff_test_c.c ${COMMON_FILE_LIST})
+add_executable(c_test src/fff_test_c.c ${COMMON_FILE_LIST})
+target_include_directories(c_test PRIVATE include)
 target_link_libraries(c_test PRIVATE fff)
 
 # Create the C++ test executable
-add_executable(cpp_test fff_test_cpp.cpp ${COMMON_FILE_LIST})
+add_executable(cpp_test src/fff_test_cpp.cpp ${COMMON_FILE_LIST})
+target_include_directories(cpp_test PRIVATE include)
 target_link_libraries(cpp_test PRIVATE gtest fff)
 
 # Create the C global test executable
 add_executable(c_global_test
-    fff_test_global_c.c
-    global_fakes.c
-    global_fakes.h
+    src/fff_test_global_c.c
+    src/global_fakes.c
+    include/global_fakes.h
     ${COMMON_FILE_LIST}
 )
+target_include_directories(c_global_test PRIVATE include)
 target_link_libraries(c_global_test PRIVATE fff)
 
 # Create the C++ global test executable
 add_executable(cpp_global_test
-    fff_test_global_cpp.cpp
-    global_fakes.c
-    global_fakes.h
+    src/fff_test_global_cpp.cpp
+    src/global_fakes.c
+    include/global_fakes.h
     ${COMMON_FILE_LIST}
 )
+target_include_directories(cpp_global_test PRIVATE include)
 target_link_libraries(cpp_global_test PRIVATE gtest fff)
 
 # Add the tests for ctest

test/include/global_fakes.h

@@ -1,8 +1,8 @@
 #ifndef GLOBAL_FAKES_H_
 #define GLOBAL_FAKES_H_
 
-#include "fff.h"
-#include "string.h"
+#include <fff.h>
+#include <string.h>
 
 
 ////  Imaginary production code header file ///

test/src/fff_test_cpp.cpp

@@ -13,7 +13,7 @@
 #define FFF_CALL_HISTORY_LEN OVERRIDE_CALL_HIST_LEN
 
 #include "fff.h"
-#include <gtest/gtest.h>
+#include "gtest/gtest.h"
 
 DEFINE_FFF_GLOBALS
 

test/src/fff_test_global_cpp.cpp

@@ -2,7 +2,7 @@
 extern "C"{
     #include "global_fakes.h"
 }
-#include <gtest/gtest.h>
+#include "gtest/gtest.h"
 
 DEFINE_FFF_GLOBALS;