cmTestGenerator: Evaluate generator expressions in test properties

This is useful for cases like:

  add_test(NAME mytest COMMAND mydriver $<TARGET_FILE:myexe>)
  set_tests_properties(mytest PROPERTIES
    REQUIRED_FILES "$<TARGET_FILE:myexe>"
    WORKING_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/$<CONFIGURATION>"
    )

In this example we require the actual test executable to exist to
run the test in addition to the test driver at argv[0].  Also the
$<CONFIGURATION> expression improves over \${CTEST_CONFIGURATION_TYPE}
because the latter is not normalized for case-sensitive filesystems.

Source/cmSetTestsPropertiesCommand.h

@@ -51,7 +51,8 @@ public:
       "  set_tests_properties(test1 [test2...] PROPERTIES prop1 value1 prop2"
       " value2)\n"
       "Set a property for the tests. If the property is not found, CMake "
-      "will report an error. The properties include:\n"
+      "will report an error. Generator expressions will be expanded the same "
+      "as supported by the test's add_test call. The properties include:\n"
       "WILL_FAIL: If set to true, this will invert the pass/fail flag of the"
       " test.\n"
       "PASS_REGULAR_EXPRESSION: If set, the test output will be checked "

Source/cmTestGenerator.cxx

@@ -117,7 +117,8 @@ void cmTestGenerator::GenerateScriptForConfig(std::ostream& os,
         i != pm.end(); ++i)
       {
       os << " " << i->first
-         << " " << lg->EscapeForCMake(i->second.GetValue());
+         << " " << lg->EscapeForCMake(
+           ge.Parse(i->second.GetValue())->Evaluate(mf, config));
       }
     os << ")" << std::endl;
     }

Tests/CMakeLists.txt

@@ -604,6 +604,7 @@ ${CMake_BINARY_DIR}/bin/cmake -DVERSION=master -P ${CMake_SOURCE_DIR}/Utilities/
     ${build_generator_args}
     --build-project GeneratorExpression
     --build-options -DCMAKE_BUILD_TYPE=\${CTEST_CONFIGURATION_TYPE}
+    --test-command ${CMAKE_CTEST_COMMAND} -C \${CTEST_CONFIGURATION_TYPE} -V
     )
   list(APPEND TEST_BUILD_DIRS "${CMake_BINARY_DIR}/Tests/GeneratorExpression")
 

Tests/GeneratorExpression/CMakeLists.txt

@@ -1,5 +1,7 @@
 cmake_minimum_required (VERSION 2.8.8)
-project(GeneratorExpression CXX)
+project(GeneratorExpression)
+
+include(CTest)
 
 # This test is split into multiple parts as needed to avoid NMake command
 # length limits.
@@ -190,3 +192,31 @@ add_custom_target(check-part3 ALL
   COMMAND ${CMAKE_COMMAND} -E echo "check done (part 3 of 3)"
   VERBATIM
   )
+
+#-----------------------------------------------------------------------------
+# Cover test properties with generator expressions.
+add_executable(echo echo.c)
+add_executable(pwd pwd.c)
+
+add_test(NAME echo-configuration COMMAND echo $<CONFIGURATION>)
+set_property(TEST echo-configuration PROPERTY
+  PASS_REGULAR_EXPRESSION "^$<CONFIGURATION>\n$")
+
+add_test(NAME echo-target-file COMMAND echo $<TARGET_FILE:echo>)
+set_property(TEST echo-target-file PROPERTY
+  PASS_REGULAR_EXPRESSION "/echo${CMAKE_EXECUTABLE_SUFFIX}\n$")
+set_property(TEST echo-target-file PROPERTY
+  REQUIRED_FILES "$<TARGET_FILE:echo>")
+
+add_test(NAME working-dir-arg
+  WORKING_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/WorkingDirectory/$<CONFIGURATION>"
+  COMMAND pwd)
+set_property(TEST working-dir-arg PROPERTY
+  PASS_REGULAR_EXPRESSION "WorkingDirectory/$<CONFIGURATION>\n$")
+foreach(c ${CMAKE_CONFIGURATION_TYPES} ${CMAKE_BUILD_TYPE})
+  file(MAKE_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/WorkingDirectory/${c}")
+endforeach()
+
+add_test(echo-old-style echo "\$<CONFIGURATION>")
+set_property(TEST echo-old-style PROPERTY
+    PASS_REGULAR_EXPRESSION "^\\$<CONFIGURATION>\n$")

Tests/GeneratorExpression/echo.c

@@ -0,0 +1,8 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+int main(int argc, char* argv[])
+{
+  printf("%s\n", argv[1]);
+  return EXIT_SUCCESS;
+}

Tests/GeneratorExpression/pwd.c

@@ -0,0 +1,34 @@
+#include <limits.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#ifdef _WIN32
+#include <direct.h>
+#define getcurdir _getcwd
+#else
+#include <unistd.h>
+#define getcurdir getcwd
+#endif
+
+int main(int argc, char* argv[])
+{
+#define BUFSZ 20000
+  char buf[BUFSZ + 1];
+#ifdef _WIN32
+  char *pos;
+#endif
+  getcurdir(buf, BUFSZ);
+#ifdef _WIN32
+  pos = buf;
+  while (*pos)
+    {
+    if (*pos == '\\')
+      {
+      *pos = '/';
+      }
+    ++pos;
+    }
+#endif
+  printf("%s\n", buf);
+  return EXIT_SUCCESS;
+}