chore(ci): Enable testing using lit and filecheck.

Implements: #37 and #39

Author: robertoraggi

.github/workflows/ci.yml

@@ -25,6 +25,10 @@ jobs:
           cmake -Bbuild -DCMAKE_BUILD_TYPE=Release -DCMAKE_EXPORT_COMPILE_COMMANDS=1 .
           cmake --build build
 
+      - name: Test
+        run: |
+          cmake --build build --target test
+
   build-windows:
     runs-on: windows-latest
 

CMakeLists.txt

@@ -121,3 +121,5 @@ add_custom_target(unit.tokens
 )
 
 enable_testing()
+
+add_subdirectory(tests)

tests/CMakeLists.txt

@@ -0,0 +1 @@
+add_subdirectory(unit_tests)

tests/unit_tests/CMakeLists.txt

@@ -0,0 +1,54 @@
+# Copyright (c) 2021 Roberto Raggi <[email protected]>
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy of
+# this software and associated documentation files (the "Software"), to deal in
+# the Software without restriction, including without limitation the rights to
+# use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+# the Software, and to permit persons to whom the Software is furnished to do so,
+# subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+# FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+# COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+# IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+find_program(LIT_EXECUTABLE lit)
+
+find_program(FILECHECK_EXECUTABLE filecheck)
+
+if(NOT LIT_EXECUTABLE)
+    message(STATUS "lit not found: skip unit tests")
+    return()
+endif()
+
+message(STATUS "Using lit: ${LIT_EXECUTABLE}")
+
+if(NOT FILECHECK_EXECUTABLE)
+    message(STATUS "filecheck not found: skip unit tests")
+    return()
+endif()
+
+message(STATUS "Using filecheck: ${FILECHECK_EXECUTABLE}")
+
+add_executable(lit::tool IMPORTED)
+set_target_properties(lit::tool PROPERTIES IMPORTED_LOCATION ${LIT_EXECUTABLE})
+
+add_executable(filecheck::tool IMPORTED)
+set_target_properties(filecheck::tool PROPERTIES IMPORTED_LOCATION ${FILECHECK_EXECUTABLE})
+
+set(CXX_FRONTEND_TARGET_FILE $<TARGET_FILE:cxx-frontend>)
+
+file(READ lit.site.cfg.py.in lit_cfg_in)
+
+string(CONFIGURE "${lit_cfg_in}" lit_cfg @ONLY)
+
+file(GENERATE
+    OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/lit.site.cfg.py
+    CONTENT "${lit_cfg}")
+
+add_subdirectory(preprocessor)

tests/unit_tests/lit.cfg.py

@@ -0,0 +1,33 @@
+# Copyright (c) 2021 Roberto Raggi <[email protected]>
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy of
+# this software and associated documentation files (the "Software"), to deal in
+# the Software without restriction, including without limitation the rights to
+# use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+# the Software, and to permit persons to whom the Software is furnished to do so,
+# subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+# FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+# COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+# IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+import os
+
+import lit.util
+import lit.formats
+
+config.name = "C++"
+
+config.test_format = lit.formats.ShTest()
+
+config.suffixes = [".cc"]
+
+config.test_source_root = os.path.dirname(__file__)
+
+config.substitutions.append(("%cxx", config.cxx))

tests/unit_tests/lit.site.cfg.py.in

@@ -0,0 +1,25 @@
+# Copyright (c) 2021 Roberto Raggi <[email protected]>
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy of
+# this software and associated documentation files (the "Software"), to deal in
+# the Software without restriction, including without limitation the rights to
+# use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+# the Software, and to permit persons to whom the Software is furnished to do so,
+# subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+# FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+# COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+# IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+config.cxx = "@CXX_FRONTEND_TARGET_FILE@"
+
+config.cxx_unit_tests_root = "@CMAKE_CURRENT_SOURCE_DIR@"
+
+lit_config.load_config(
+    config, os.path.join(config.cxx_unit_tests_root, "lit.cfg.py"))

tests/unit_tests/preprocessor/CMakeLists.txt

@@ -0,0 +1,21 @@
+# Copyright (c) 2021 Roberto Raggi <[email protected]>
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy of
+# this software and associated documentation files (the "Software"), to deal in
+# the Software without restriction, including without limitation the rights to
+# use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+# the Software, and to permit persons to whom the Software is furnished to do so,
+# subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+# FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+# COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+# IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+add_test(NAME preprocessor
+    COMMAND lit::tool -v ${CMAKE_CURRENT_BINARY_DIR})

tests/unit_tests/preprocessor/define.001.cc

@@ -0,0 +1,10 @@
+// RUN: %cxx -E %s -o - | filecheck %s
+
+#define RESULT 0
+
+int main() {
+  int result = RESULT;
+  return result;
+}
+
+// CHECK: int result = 0;