gtest: move GTest/GMock files to separate directory, update GTest/GMock usages

* all GTest/GMock files moved to `test/gtest` directory
* `CMakeLists.txt` created in `test/gtest` from `CMakeLists.txt` in `test`
* GTest/GMock target in CMake renamed to `gtest` (was `gmock`)
* CMake `gtest` target updated to export includes as "gtest/gtest.h" or "gmock/gmock.h" only
* includes in tests updated: "gtest.h" -> "gtest/gtest.h", "gmock.h" -> "gmock/gmock.h"
* removed duplications of `target_include_directories` for GTest/GMock directories (CMake manages them)

test/CMakeLists.txt

@@ -1,44 +1,11 @@
-#------------------------------------------------------------------------------
-# Build the google test library
-
-# We compile Google Test ourselves instead of using pre-compiled libraries.
-# See the Google Test FAQ "Why is it not recommended to install a
-# pre-compiled copy of Google Test (for example, into /usr/local)?"
-# at http://code.google.com/p/googletest/wiki/FAQ for more details.
-add_library(gmock STATIC
-  gmock-gtest-all.cc gmock/gmock.h gtest/gtest.h gtest/gtest-spi.h)
-target_compile_definitions(gmock PUBLIC GTEST_HAS_STD_WSTRING=1)
-target_include_directories(gmock SYSTEM PUBLIC . gmock gtest)
-
-find_package(Threads)
-if (Threads_FOUND)
-  target_link_libraries(gmock ${CMAKE_THREAD_LIBS_INIT})
-else ()
-  target_compile_definitions(gmock PUBLIC GTEST_HAS_PTHREAD=0)
-endif ()
-
-target_compile_definitions(gmock PUBLIC GTEST_LANG_CXX11=1)
-
-if (MSVC)
-  # Disable MSVC warnings of _CRT_INSECURE_DEPRECATE functions.
-  target_compile_definitions(gmock PRIVATE _CRT_SECURE_NO_WARNINGS)
-  if (CMAKE_CXX_COMPILER_ID MATCHES "Clang")
-    # Disable MSVC warnings of POSIX functions.
-    target_compile_options(gmock PUBLIC -Wno-deprecated-declarations)
-  endif ()
-endif ()
-
-# Silence MSVC tr1 deprecation warning in gmock.
-target_compile_definitions(gmock
-  PUBLIC _SILENCE_TR1_NAMESPACE_DEPRECATION_WARNING=1)
+add_subdirectory(gtest)
 
 #------------------------------------------------------------------------------
 # Build the actual library tests
 
 set(TEST_MAIN_SRC test-main.cc gtest-extra.cc gtest-extra.h util.cc)
 add_library(test-main STATIC ${TEST_MAIN_SRC})
-target_include_directories(test-main SYSTEM PUBLIC gtest gmock)
-target_link_libraries(test-main gmock fmt)
+target_link_libraries(test-main gtest fmt)
 
 include(CheckCXXCompilerFlag)
 
@@ -75,7 +42,6 @@ function(add_fmt_test name)
   if (FMT_WERROR)
     target_compile_options(${name} PRIVATE ${WERROR_FLAG})
   endif ()
-  target_include_directories(${name} SYSTEM PUBLIC gtest gmock)
   add_test(NAME ${name} COMMAND ${name})
 endfunction()
 
@@ -122,8 +88,7 @@ if (NOT MSVC_STATIC_RUNTIME)
     posix-mock-test.cc ../src/format.cc ${TEST_MAIN_SRC})
   target_include_directories(
     posix-mock-test PRIVATE ${PROJECT_SOURCE_DIR}/include)
-  target_link_libraries(posix-mock-test gmock)
-  target_include_directories(posix-mock-test SYSTEM PUBLIC gtest gmock)
+  target_link_libraries(posix-mock-test gtest)
   if (FMT_PEDANTIC)
     target_compile_options(posix-mock-test PRIVATE ${PEDANTIC_COMPILE_FLAGS})
   endif ()
@@ -136,8 +101,7 @@ endif ()
 
 add_fmt_executable(header-only-test
   header-only-test.cc header-only-test2.cc test-main.cc)
-target_link_libraries(header-only-test gmock)
-target_include_directories(header-only-test SYSTEM PUBLIC gtest gmock)
+target_link_libraries(header-only-test gtest)
 if (TARGET fmt-header-only)
   target_link_libraries(header-only-test fmt-header-only)
 else ()

test/args-test.cc

@@ -7,7 +7,7 @@
 
 #include "fmt/args.h"
 
-#include "gtest.h"
+#include "gtest/gtest.h"
 
 TEST(args_test, basic) {
   auto store = fmt::dynamic_format_arg_store<fmt::format_context>();

test/assert-test.cc

@@ -10,7 +10,7 @@
 // For the license information refer to format.h.
 
 #include "fmt/core.h"
-#include "gtest.h"
+#include "gtest/gtest.h"
 
 TEST(assert_test, fail) {
 #if GTEST_HAS_DEATH_TEST

test/compile-test.cc

@@ -15,7 +15,7 @@
 
 #include "fmt/chrono.h"
 #include "fmt/compile.h"
-#include "gmock.h"
+#include "gmock/gmock.h"
 #include "gtest-extra.h"
 #include "util.h"
 

test/core-test.cc

@@ -20,7 +20,7 @@
 #include <string>       // std::string
 #include <type_traits>  // std::is_same
 
-#include "gmock.h"
+#include "gmock/gmock.h"
 
 #if defined(FMT_COMPILE_TIME_CHECKS) && FMT_COMPILE_TIME_CHECKS
 #  include "fmt/format.h"

test/format-impl-test.cc

@@ -15,7 +15,7 @@
 
 #include "../src/format.cc"
 #include "fmt/printf.h"
-#include "gmock.h"
+#include "gmock/gmock.h"
 #include "gtest-extra.h"
 #include "util.h"
 

test/format-test.cc

@@ -30,7 +30,7 @@
 
 #undef index
 
-#include "gmock.h"
+#include "gmock/gmock.h"
 #include "gtest-extra.h"
 #include "mock-allocator.h"
 #include "util.h"

test/gtest-extra.h

@@ -11,7 +11,7 @@
 #include <string>
 
 #include "fmt/os.h"
-#include "gmock.h"
+#include "gmock/gmock.h"
 
 #define FMT_TEST_THROW_(statement, expected_exception, expected_message, fail) \
   GTEST_AMBIGUOUS_ELSE_BLOCKER_                                                \

test/gtest/CMakeLists.txt

@@ -0,0 +1,33 @@
+#------------------------------------------------------------------------------
+# Build the google test library
+
+# We compile Google Test ourselves instead of using pre-compiled libraries.
+# See the Google Test FAQ "Why is it not recommended to install a
+# pre-compiled copy of Google Test (for example, into /usr/local)?"
+# at http://code.google.com/p/googletest/wiki/FAQ for more details.
+add_library(gtest STATIC
+  gmock-gtest-all.cc gmock/gmock.h gtest/gtest.h gtest/gtest-spi.h)
+target_compile_definitions(gtest PUBLIC GTEST_HAS_STD_WSTRING=1)
+target_include_directories(gtest SYSTEM PUBLIC .)
+
+find_package(Threads)
+if (Threads_FOUND)
+  target_link_libraries(gtest ${CMAKE_THREAD_LIBS_INIT})
+else ()
+  target_compile_definitions(gtest PUBLIC GTEST_HAS_PTHREAD=0)
+endif ()
+
+target_compile_definitions(gtest PUBLIC GTEST_LANG_CXX11=1)
+
+if (MSVC)
+  # Disable MSVC warnings of _CRT_INSECURE_DEPRECATE functions.
+  target_compile_definitions(gtest PRIVATE _CRT_SECURE_NO_WARNINGS)
+  if (CMAKE_CXX_COMPILER_ID MATCHES "Clang")
+    # Disable MSVC warnings of POSIX functions.
+    target_compile_options(gtest PUBLIC -Wno-deprecated-declarations)
+  endif ()
+endif ()
+
+# Silence MSVC tr1 deprecation warning in gmock.
+target_compile_definitions(gtest
+  PUBLIC _SILENCE_TR1_NAMESPACE_DEPRECATION_WARNING=1)

test/locale-test.cc

@@ -9,7 +9,7 @@
 
 #include <complex>
 
-#include "gmock.h"
+#include "gmock/gmock.h"
 
 using fmt::detail::max_value;
 

test/mock-allocator.h

@@ -9,7 +9,7 @@
 #define FMT_MOCK_ALLOCATOR_H_
 
 #include "fmt/format.h"
-#include "gmock.h"
+#include "gmock/gmock.h"
 
 template <typename T> class mock_allocator {
  public:

test/ostream-test.cc

@@ -24,7 +24,7 @@ template <> struct formatter<test> : formatter<int> {
 
 #include "fmt/ostream.h"
 #include "fmt/ranges.h"
-#include "gmock.h"
+#include "gmock/gmock.h"
 #include "gtest-extra.h"
 #include "util.h"
 

test/posix-mock-test.cc

@@ -26,7 +26,7 @@
 #  undef ERROR
 #endif
 
-#include "gmock.h"
+#include "gmock/gmock.h"
 #include "gtest-extra.h"
 #include "util.h"
 

test/ranges-test.cc

@@ -16,7 +16,7 @@
 #include <string>
 #include <vector>
 
-#include "gtest.h"
+#include "gtest/gtest.h"
 
 #if !FMT_GCC_VERSION || FMT_GCC_VERSION >= 601
 #  define FMT_RANGES_TEST_ENABLE_C_STYLE_ARRAY

test/scan-test.cc

@@ -11,7 +11,7 @@
 
 #include <climits>
 
-#include "gmock.h"
+#include "gmock/gmock.h"
 #include "gtest-extra.h"
 
 TEST(ScanTest, ReadText) {

test/std-format-test.cc

@@ -1,6 +1,6 @@
 #include <format>
 
-#include "gtest.h"
+#include "gtest/gtest.h"
 
 TEST(StdFormatTest, Escaping) {
   using namespace std;

test/test-assert.h

@@ -10,7 +10,7 @@
 
 #include <stdexcept>
 
-#include "gtest.h"
+#include "gtest/gtest.h"
 
 class assertion_failure : public std::logic_error {
  public:

test/test-main.cc

@@ -7,7 +7,7 @@
 
 #include <cstdlib>
 
-#include "gtest.h"
+#include "gtest/gtest.h"
 
 #ifdef _WIN32
 #  include <windows.h>